A majority of patients with mild traumatic brain injury (mTBI) have evidence of chronic traumatic encephalopathy (CTE), according to research published in the online December 2 Brain. Of 85 participants with a history of mTBI, 68 (80%) showed postmortem evidence of the degenerative brain disease. The persons with CTE were all males ages 17 to 98, most of whom were athletes and military veterans. The researchers used a four-stage system to classify CTE, and symptoms ranged from headache and concentration difficulties in stage one to dementia, aggression, and difficulty with words in stage four. Among American football players, stage of CTE correlated with increased duration of football play, survival after football, and age of death. “There is an ordered and predictable progression of hyperphosphorylated tau abnormalities through the nervous system in CTE that occurs in conjunction with widespread axonal disruption and loss,” the researchers said.
Persons who experience traumatic brain injury (TBI) and have also been exposed to the pesticide paraquat have triple the risk of developing Parkinson’s disease, according to research published in the November 13 Neurology. From 2001 to 2011, investigators examined 357 persons with idiopathic Parkinson’s disease and 754 population controls. A validated geographic information system based on records of pesticide application was used to assess paraquat exposure, while TBI was assessed through self-report of all head injuries that involved loss of consciousness for greater than five minutes. According to the researchers, exposure to paraquat and TBI each moderately increase the risk of Parkinson’s disease. However, the risk of developing Parkinson’s disease was threefold higher in study participants with both TBI and exposure to paraquat than in participants exposed to neither risk factor, the investigators said.
Preterm-born children have a significantly reduced capacity for cortical neuroplasticity, which affects learning and memory, researchers reported in the November 14 Journal of Neuroscience. The investigators used a noninvasive magnetic brain stimulation technique to induce long-term depressionlike neuroplasticity in groups of adolescents born after early preterm, late preterm, and term gestations. “Compared with term-born adolescents, both early and late preterm adolescents had reduced long-term depressionlike neuroplasticity in response to brain stimulation that was also associated with low salivary cortisol levels,” said the study authors, adding that these findings may show a potential mechanistic link between the brain physiology of preterm birth and behavioral deficits in learning and memory. Altered hypothalamic-pituitary-adrenal axis function may modulate the altered neuroplasticity and may offer options for therapeutic interventions, the researchers concluded.
MRI scans show that patients with mild traumatic brain injury (mTBI) have abnormal default-mode network connectivity patterns, researchers reported in the December Radiology. The study used resting-state functional MRI to characterize the default-mode network and included 18 healthy controls and 23 patients with mTBI who had post-traumatic symptoms less than two months after injury. Compared with controls, patients with mTBI showed significantly reduced connectivity in the posterior cingulate complex and parietal regions, which correlated positively with neurocognitive dysfunction. Patients with mTBI also showed increased frontal connectivity around the medial prefrontal cortex, which correlated with post-traumatic symptoms such as depression, anxiety, fatigue, and postconcussion syndrome. According to the researchers, the results may “provide insight into how neuronal communication and information integration are disrupted among default-mode network key structures after mild head injury.”

Increased concentration of phosphorylated neurofilament heavy subunit (pNF-H) in the plasma, serum, and CSF of patients with amyotrophic lateral sclerosis (ALS) may be associated with faster disease progression, according to research published in the online October 31 Journal of Neurology, Neurosurgery & Psychiatry. Investigators measured pNF-H concentration in the plasma and CSF of patients with ALS from the Mayo Clinic Florida and Emory University, as well as plasma from an earlier pilot study of 20 patients with ALS. Analysis showed that higher levels of pNF-H in plasma, serum, and CSF were linked with greater decline for ALS patients. The researchers also noted that patients with bulbar onset might have higher pNF-H concentration in plasma than those with spinal onset, though the results require confirmation. “These data support further study of pNF-H in CSF, serum, and plasma as a potential ALS biomarker,” the study authors said.
Paralyzed dogs who received intraspinal transplantation of cells derived from olfactory mucosal cultures regained some movement, researchers reported in the November Brain. The investigators conducted a randomized, double-blind clinical trial in which dogs with severe chronic thoracolumbar spinal injuries received an injection of either intraspinal autologous cells derived from olfactory mucosal cultures or cell transport medium alone. Dogs who received the olfactory mucosal transplants showed significantly better fore–hind coordination than those who received only the cell transport medium. “We conclude that intraspinal olfactory mucosal cell transplantation improves communication across the damaged region of the injured spinal cord, even in chronically injured individuals. However, we find no evidence for concomitant improvement in long tract function,” the researchers said.
Suvorexant, an orexin receptor antagonist, may offer a novel approach to treating insomnia, researchers reported in the December Neurology. In a randomized, double-blind, placebo-controlled study that took place during two periods of four weeks, patients received 10 mg, 20 mg, 40 mg, or 80 mg of suvorexant in one period and placebo in the other period. Coprimary end points were sleep efficiency on night one and at the end of week four. Patients receiving suvorexant showed significant dose-related improvements on both of the primary end points compared with those receiving placebo. “Dose-related effects were also observed for sleep induction (latency to persistent sleep) and maintenance (wake after sleep onset). Suvorexant was generally well tolerated,” the researchers said.
Persons born in April have significantly more risk of developing multiple sclerosis (MS) than those born in October and November, according to research published in the online November 14 Journal of Neurology, Neurosurgery & Psychiatry. The study was a meta-analysis of previously published data on month of birth of 151,978 patients with MS. According to the researchers, the month of birth effect is “likely to be due to ultraviolet light exposure and maternal vitamin D levels.” In a separate study published in the November 20 Neurology, investigators observed an association between high levels of vitamin D in the years prior to disease onset and a decreased risk of MS. However, there was no association between gestational levels of vitamin D and MS risk in the offspring. Decreasing levels of vitamin D in the population might help explain the increase in MS cases suggested from epidemiologic studies, the study authors said.
Mutations of the immune system gene TREM2 may be linked to an increased risk of Alzheimer’s disease, researchers reported in two studies in the online November 14 New England Journal of Medicine. In one study, investigators analyzed the genetic variability in TREM2 and performed a meta-analysis on imputed data for the TREM2 variant rs75932628, which is predicted to cause a R47H substitution. The R47H mutation was highly significantly associated with Alzheimer’s disease, said the authors. In the second study, researchers examined genome sequences of 2,261 Icelanders and found that the TREM2 mutation rs75932628-T conferred a significant risk of Alzheimer’s disease (odds ratio, 2.92). “Given the reported anti-inflammatory role of TREM2 in the brain, the R47H substitution may lead to an increased predisposition to Alzheimer’s disease through impaired containment of inflammatory processes,” the investigators concluded.
Exposure to traffic-related air pollution during pregnancy and the first year of life is associated with autism, according to a study published in the online November Archives of General Psychiatry. Researchers conducted a population-based case-control study that included data from 279 children with autism and 245 control children with typical development. Compared with controls, those with autism were more likely to live in areas with the highest quartile of exposure to traffic-related air pollution during gestation and during the first year of life. Exposure to particulate matter and nitrogen dioxide were also linked with autism. “Further epidemiological and toxicological examinations of likely biological pathways will help determine whether these associations are causal,” the researchers concluded.
Consumption of fish and long-chain omega 3 fatty acids may moderately reduce cerebrovascular risk, but fish oil supplements may not have the same beneficial effect, according to research published in the October 30 BMJ. The systemic review and meta-analysis examined 26 prospective cohort studies and 12 randomized controlled trials with aggregate data on 794,000 participants and 34,817 cerebrovascular outcomes. Results showed that persons who ate two to four servings of fish per week and those who ate five or more servings a week had a lower risk of cerebrovascular disease, compared with persons who ate one serving a week. However, no association was observed between risk for cerebrovascular disease and long-chain omega 3 fatty acids measured as circulating biomarkers in observational studies or supplements in primary and secondary prevention trials.
Depression is the most important factor affecting the health status of patients with Parkinson’s disease, according to early findings released as part of the Parkinson’s Outcome Project, a longitudinal study examining which treatments produce the best outcomes. The study, which began in 2009, includes data from more than 5,500 patients with Parkinson’s disease. Based on this research, the National Parkinson Foundation recommends screening patients for depression at least once a year and encouraging patients to discuss any mood change with a health care professional, particularly the physician treating them for Parkinson’s disease. Patients may also benefit from bringing a family member to doctor’s appointments and asking the family member to share any changes in the patient’s mood.                          

A majority of patients with mild traumatic brain injury (mTBI) have evidence of chronic traumatic encephalopathy (CTE), according to research published in the online December 2 Brain. Of 85 participants with a history of mTBI, 68 (80%) showed postmortem evidence of the degenerative brain disease. The persons with CTE were all males ages 17 to 98, most of whom were athletes and military veterans. The researchers used a four-stage system to classify CTE, and symptoms ranged from headache and concentration difficulties in stage one to dementia, aggression, and difficulty with words in stage four. Among American football players, stage of CTE correlated with increased duration of football play, survival after football, and age of death. “There is an ordered and predictable progression of hyperphosphorylated tau abnormalities through the nervous system in CTE that occurs in conjunction with widespread axonal disruption and loss,” the researchers said.
Persons who experience traumatic brain injury (TBI) and have also been exposed to the pesticide paraquat have triple the risk of developing Parkinson’s disease, according to research published in the November 13 Neurology. From 2001 to 2011, investigators examined 357 persons with idiopathic Parkinson’s disease and 754 population controls. A validated geographic information system based on records of pesticide application was used to assess paraquat exposure, while TBI was assessed through self-report of all head injuries that involved loss of consciousness for greater than five minutes. According to the researchers, exposure to paraquat and TBI each moderately increase the risk of Parkinson’s disease. However, the risk of developing Parkinson’s disease was threefold higher in study participants with both TBI and exposure to paraquat than in participants exposed to neither risk factor, the investigators said.
Preterm-born children have a significantly reduced capacity for cortical neuroplasticity, which affects learning and memory, researchers reported in the November 14 Journal of Neuroscience. The investigators used a noninvasive magnetic brain stimulation technique to induce long-term depressionlike neuroplasticity in groups of adolescents born after early preterm, late preterm, and term gestations. “Compared with term-born adolescents, both early and late preterm adolescents had reduced long-term depressionlike neuroplasticity in response to brain stimulation that was also associated with low salivary cortisol levels,” said the study authors, adding that these findings may show a potential mechanistic link between the brain physiology of preterm birth and behavioral deficits in learning and memory. Altered hypothalamic-pituitary-adrenal axis function may modulate the altered neuroplasticity and may offer options for therapeutic interventions, the researchers concluded.
MRI scans show that patients with mild traumatic brain injury (mTBI) have abnormal default-mode network connectivity patterns, researchers reported in the December Radiology. The study used resting-state functional MRI to characterize the default-mode network and included 18 healthy controls and 23 patients with mTBI who had post-traumatic symptoms less than two months after injury. Compared with controls, patients with mTBI showed significantly reduced connectivity in the posterior cingulate complex and parietal regions, which correlated positively with neurocognitive dysfunction. Patients with mTBI also showed increased frontal connectivity around the medial prefrontal cortex, which correlated with post-traumatic symptoms such as depression, anxiety, fatigue, and postconcussion syndrome. According to the researchers, the results may “provide insight into how neuronal communication and information integration are disrupted among default-mode network key structures after mild head injury.”

Increased concentration of phosphorylated neurofilament heavy subunit (pNF-H) in the plasma, serum, and CSF of patients with amyotrophic lateral sclerosis (ALS) may be associated with faster disease progression, according to research published in the online October 31 Journal of Neurology, Neurosurgery & Psychiatry. Investigators measured pNF-H concentration in the plasma and CSF of patients with ALS from the Mayo Clinic Florida and Emory University, as well as plasma from an earlier pilot study of 20 patients with ALS. Analysis showed that higher levels of pNF-H in plasma, serum, and CSF were linked with greater decline for ALS patients. The researchers also noted that patients with bulbar onset might have higher pNF-H concentration in plasma than those with spinal onset, though the results require confirmation. “These data support further study of pNF-H in CSF, serum, and plasma as a potential ALS biomarker,” the study authors said.
Paralyzed dogs who received intraspinal transplantation of cells derived from olfactory mucosal cultures regained some movement, researchers reported in the November Brain. The investigators conducted a randomized, double-blind clinical trial in which dogs with severe chronic thoracolumbar spinal injuries received an injection of either intraspinal autologous cells derived from olfactory mucosal cultures or cell transport medium alone. Dogs who received the olfactory mucosal transplants showed significantly better fore–hind coordination than those who received only the cell transport medium. “We conclude that intraspinal olfactory mucosal cell transplantation improves communication across the damaged region of the injured spinal cord, even in chronically injured individuals. However, we find no evidence for concomitant improvement in long tract function,” the researchers said.
Suvorexant, an orexin receptor antagonist, may offer a novel approach to treating insomnia, researchers reported in the December Neurology. In a randomized, double-blind, placebo-controlled study that took place during two periods of four weeks, patients received 10 mg, 20 mg, 40 mg, or 80 mg of suvorexant in one period and placebo in the other period. Coprimary end points were sleep efficiency on night one and at the end of week four. Patients receiving suvorexant showed significant dose-related improvements on both of the primary end points compared with those receiving placebo. “Dose-related effects were also observed for sleep induction (latency to persistent sleep) and maintenance (wake after sleep onset). Suvorexant was generally well tolerated,” the researchers said.
Persons born in April have significantly more risk of developing multiple sclerosis (MS) than those born in October and November, according to research published in the online November 14 Journal of Neurology, Neurosurgery & Psychiatry. The study was a meta-analysis of previously published data on month of birth of 151,978 patients with MS. According to the researchers, the month of birth effect is “likely to be due to ultraviolet light exposure and maternal vitamin D levels.” In a separate study published in the November 20 Neurology, investigators observed an association between high levels of vitamin D in the years prior to disease onset and a decreased risk of MS. However, there was no association between gestational levels of vitamin D and MS risk in the offspring. Decreasing levels of vitamin D in the population might help explain the increase in MS cases suggested from epidemiologic studies, the study authors said.
Mutations of the immune system gene TREM2 may be linked to an increased risk of Alzheimer’s disease, researchers reported in two studies in the online November 14 New England Journal of Medicine. In one study, investigators analyzed the genetic variability in TREM2 and performed a meta-analysis on imputed data for the TREM2 variant rs75932628, which is predicted to cause a R47H substitution. The R47H mutation was highly significantly associated with Alzheimer’s disease, said the authors. In the second study, researchers examined genome sequences of 2,261 Icelanders and found that the TREM2 mutation rs75932628-T conferred a significant risk of Alzheimer’s disease (odds ratio, 2.92). “Given the reported anti-inflammatory role of TREM2 in the brain, the R47H substitution may lead to an increased predisposition to Alzheimer’s disease through impaired containment of inflammatory processes,” the investigators concluded.
Exposure to traffic-related air pollution during pregnancy and the first year of life is associated with autism, according to a study published in the online November Archives of General Psychiatry. Researchers conducted a population-based case-control study that included data from 279 children with autism and 245 control children with typical development. Compared with controls, those with autism were more likely to live in areas with the highest quartile of exposure to traffic-related air pollution during gestation and during the first year of life. Exposure to particulate matter and nitrogen dioxide were also linked with autism. “Further epidemiological and toxicological examinations of likely biological pathways will help determine whether these associations are causal,” the researchers concluded.
Consumption of fish and long-chain omega 3 fatty acids may moderately reduce cerebrovascular risk, but fish oil supplements may not have the same beneficial effect, according to research published in the October 30 BMJ. The systemic review and meta-analysis examined 26 prospective cohort studies and 12 randomized controlled trials with aggregate data on 794,000 participants and 34,817 cerebrovascular outcomes. Results showed that persons who ate two to four servings of fish per week and those who ate five or more servings a week had a lower risk of cerebrovascular disease, compared with persons who ate one serving a week. However, no association was observed between risk for cerebrovascular disease and long-chain omega 3 fatty acids measured as circulating biomarkers in observational studies or supplements in primary and secondary prevention trials.
Depression is the most important factor affecting the health status of patients with Parkinson’s disease, according to early findings released as part of the Parkinson’s Outcome Project, a longitudinal study examining which treatments produce the best outcomes. The study, which began in 2009, includes data from more than 5,500 patients with Parkinson’s disease. Based on this research, the National Parkinson Foundation recommends screening patients for depression at least once a year and encouraging patients to discuss any mood change with a health care professional, particularly the physician treating them for Parkinson’s disease. Patients may also benefit from bringing a family member to doctor’s appointments and asking the family member to share any changes in the patient’s mood.                          

A majority of patients with mild traumatic brain injury (mTBI) have evidence of chronic traumatic encephalopathy (CTE), according to research published in the online December 2 Brain. Of 85 participants with a history of mTBI, 68 (80%) showed postmortem evidence of the degenerative brain disease. The persons with CTE were all males ages 17 to 98, most of whom were athletes and military veterans. The researchers used a four-stage system to classify CTE, and symptoms ranged from headache and concentration difficulties in stage one to dementia, aggression, and difficulty with words in stage four. Among American football players, stage of CTE correlated with increased duration of football play, survival after football, and age of death. “There is an ordered and predictable progression of hyperphosphorylated tau abnormalities through the nervous system in CTE that occurs in conjunction with widespread axonal disruption and loss,” the researchers said.
Persons who experience traumatic brain injury (TBI) and have also been exposed to the pesticide paraquat have triple the risk of developing Parkinson’s disease, according to research published in the November 13 Neurology. From 2001 to 2011, investigators examined 357 persons with idiopathic Parkinson’s disease and 754 population controls. A validated geographic information system based on records of pesticide application was used to assess paraquat exposure, while TBI was assessed through self-report of all head injuries that involved loss of consciousness for greater than five minutes. According to the researchers, exposure to paraquat and TBI each moderately increase the risk of Parkinson’s disease. However, the risk of developing Parkinson’s disease was threefold higher in study participants with both TBI and exposure to paraquat than in participants exposed to neither risk factor, the investigators said.
Preterm-born children have a significantly reduced capacity for cortical neuroplasticity, which affects learning and memory, researchers reported in the November 14 Journal of Neuroscience. The investigators used a noninvasive magnetic brain stimulation technique to induce long-term depressionlike neuroplasticity in groups of adolescents born after early preterm, late preterm, and term gestations. “Compared with term-born adolescents, both early and late preterm adolescents had reduced long-term depressionlike neuroplasticity in response to brain stimulation that was also associated with low salivary cortisol levels,” said the study authors, adding that these findings may show a potential mechanistic link between the brain physiology of preterm birth and behavioral deficits in learning and memory. Altered hypothalamic-pituitary-adrenal axis function may modulate the altered neuroplasticity and may offer options for therapeutic interventions, the researchers concluded.
MRI scans show that patients with mild traumatic brain injury (mTBI) have abnormal default-mode network connectivity patterns, researchers reported in the December Radiology. The study used resting-state functional MRI to characterize the default-mode network and included 18 healthy controls and 23 patients with mTBI who had post-traumatic symptoms less than two months after injury. Compared with controls, patients with mTBI showed significantly reduced connectivity in the posterior cingulate complex and parietal regions, which correlated positively with neurocognitive dysfunction. Patients with mTBI also showed increased frontal connectivity around the medial prefrontal cortex, which correlated with post-traumatic symptoms such as depression, anxiety, fatigue, and postconcussion syndrome. According to the researchers, the results may “provide insight into how neuronal communication and information integration are disrupted among default-mode network key structures after mild head injury.”

Increased concentration of phosphorylated neurofilament heavy subunit (pNF-H) in the plasma, serum, and CSF of patients with amyotrophic lateral sclerosis (ALS) may be associated with faster disease progression, according to research published in the online October 31 Journal of Neurology, Neurosurgery & Psychiatry. Investigators measured pNF-H concentration in the plasma and CSF of patients with ALS from the Mayo Clinic Florida and Emory University, as well as plasma from an earlier pilot study of 20 patients with ALS. Analysis showed that higher levels of pNF-H in plasma, serum, and CSF were linked with greater decline for ALS patients. The researchers also noted that patients with bulbar onset might have higher pNF-H concentration in plasma than those with spinal onset, though the results require confirmation. “These data support further study of pNF-H in CSF, serum, and plasma as a potential ALS biomarker,” the study authors said.
Paralyzed dogs who received intraspinal transplantation of cells derived from olfactory mucosal cultures regained some movement, researchers reported in the November Brain. The investigators conducted a randomized, double-blind clinical trial in which dogs with severe chronic thoracolumbar spinal injuries received an injection of either intraspinal autologous cells derived from olfactory mucosal cultures or cell transport medium alone. Dogs who received the olfactory mucosal transplants showed significantly better fore–hind coordination than those who received only the cell transport medium. “We conclude that intraspinal olfactory mucosal cell transplantation improves communication across the damaged region of the injured spinal cord, even in chronically injured individuals. However, we find no evidence for concomitant improvement in long tract function,” the researchers said.
Suvorexant, an orexin receptor antagonist, may offer a novel approach to treating insomnia, researchers reported in the December Neurology. In a randomized, double-blind, placebo-controlled study that took place during two periods of four weeks, patients received 10 mg, 20 mg, 40 mg, or 80 mg of suvorexant in one period and placebo in the other period. Coprimary end points were sleep efficiency on night one and at the end of week four. Patients receiving suvorexant showed significant dose-related improvements on both of the primary end points compared with those receiving placebo. “Dose-related effects were also observed for sleep induction (latency to persistent sleep) and maintenance (wake after sleep onset). Suvorexant was generally well tolerated,” the researchers said.
Persons born in April have significantly more risk of developing multiple sclerosis (MS) than those born in October and November, according to research published in the online November 14 Journal of Neurology, Neurosurgery & Psychiatry. The study was a meta-analysis of previously published data on month of birth of 151,978 patients with MS. According to the researchers, the month of birth effect is “likely to be due to ultraviolet light exposure and maternal vitamin D levels.” In a separate study published in the November 20 Neurology, investigators observed an association between high levels of vitamin D in the years prior to disease onset and a decreased risk of MS. However, there was no association between gestational levels of vitamin D and MS risk in the offspring. Decreasing levels of vitamin D in the population might help explain the increase in MS cases suggested from epidemiologic studies, the study authors said.
Mutations of the immune system gene TREM2 may be linked to an increased risk of Alzheimer’s disease, researchers reported in two studies in the online November 14 New England Journal of Medicine. In one study, investigators analyzed the genetic variability in TREM2 and performed a meta-analysis on imputed data for the TREM2 variant rs75932628, which is predicted to cause a R47H substitution. The R47H mutation was highly significantly associated with Alzheimer’s disease, said the authors. In the second study, researchers examined genome sequences of 2,261 Icelanders and found that the TREM2 mutation rs75932628-T conferred a significant risk of Alzheimer’s disease (odds ratio, 2.92). “Given the reported anti-inflammatory role of TREM2 in the brain, the R47H substitution may lead to an increased predisposition to Alzheimer’s disease through impaired containment of inflammatory processes,” the investigators concluded.
Exposure to traffic-related air pollution during pregnancy and the first year of life is associated with autism, according to a study published in the online November Archives of General Psychiatry. Researchers conducted a population-based case-control study that included data from 279 children with autism and 245 control children with typical development. Compared with controls, those with autism were more likely to live in areas with the highest quartile of exposure to traffic-related air pollution during gestation and during the first year of life. Exposure to particulate matter and nitrogen dioxide were also linked with autism. “Further epidemiological and toxicological examinations of likely biological pathways will help determine whether these associations are causal,” the researchers concluded.
Consumption of fish and long-chain omega 3 fatty acids may moderately reduce cerebrovascular risk, but fish oil supplements may not have the same beneficial effect, according to research published in the October 30 BMJ. The systemic review and meta-analysis examined 26 prospective cohort studies and 12 randomized controlled trials with aggregate data on 794,000 participants and 34,817 cerebrovascular outcomes. Results showed that persons who ate two to four servings of fish per week and those who ate five or more servings a week had a lower risk of cerebrovascular disease, compared with persons who ate one serving a week. However, no association was observed between risk for cerebrovascular disease and long-chain omega 3 fatty acids measured as circulating biomarkers in observational studies or supplements in primary and secondary prevention trials.
Depression is the most important factor affecting the health status of patients with Parkinson’s disease, according to early findings released as part of the Parkinson’s Outcome Project, a longitudinal study examining which treatments produce the best outcomes. The study, which began in 2009, includes data from more than 5,500 patients with Parkinson’s disease. Based on this research, the National Parkinson Foundation recommends screening patients for depression at least once a year and encouraging patients to discuss any mood change with a health care professional, particularly the physician treating them for Parkinson’s disease. Patients may also benefit from bringing a family member to doctor’s appointments and asking the family member to share any changes in the patient’s mood.                          

On an autumn day, a 38-year-old woman with a history of asthma presented to the emergency department (ED) with the chief complaint of shortness of breath (SOB). The patient described her SOB as sudden in onset and not relieved by use of her albuterol inhaler; hence the ED visit.

She denied any chest pain, palpitations, dizziness, orthopnea, upper respiratory tract infection, cough, wheezing, fever or chills, headache, vision changes, body aches, sick contacts, or pets at home. She said she uses her albuterol inhaler as needed, and that she had used it that day for the first time in “a few months.” She denied any history of intubation or steroid use. Additionally, she had not been seen by a primary care provider in years.

The woman, a native of Ghana, had been living in the United States for many years. She denied any recent travel or exposure to toxic chemicals; any use of tobacco, alcohol, or illicit drugs; or any history of sexually transmitted disease.

The patient was afebrile (temperature, 98.6°F), with a respiratory rate of 20 breaths/min; blood pressure, 144/69 mm Hg; and ventricular rate, 125 beats/min. On physical examination, her extraocular movements were intact; pupils were equal, round, reactive to light and accommodation; and sclera were nonicteric. The patient’s head was normocephalic and atraumatic, and the neck was supple with normal range of motion and no jugular venous distension or lymphadenopathy. Her mucous membranes were moist with no pharyngeal erythema or exudates. Cardiovascular examination, including ECG, revealed tachycardia but no murmurs or gallops.

While being evaluated in the ED, the patient became tachypneic and began to experience respiratory distress. She was intubated for airway protection, at which time she developed pulseless electrical activity (PEA), with 30 beats/min. She responded to atropine and epinephrine injections. A repeat ECG showed sinus tachycardia and right atrial enlargement with right-axis deviation. Chest x-ray (see Figure 1) showed no consolidation, pleural effusion, or pneumothorax.

Results from the patient’s lab work are shown in the table, above. Negative results were reported for a urine pregnancy test.

Since there was no clear etiology for the patient’s PEA, she underwent pan-culturing, with the following tests ordered: HIV antibody testing, immunovirology for influenza A and B viruses, and urine toxicology. Doppler ultrasound of the bilateral lower extremities was also ordered, in addition to chest CT and transthoracic and transesophageal echocardiography (TTE and TEE, respectively). The patient was intubated and transferred to the medical ICU for further management.

The differential diagnosis included cardiac tamponade, acute MI, acute pulmonary embolus (PE), tension pneumothorax, hypovolemia, and asthma exacerbated by viral or bacterial infection.^1,2 Although the case patient presented with PEA, she did not have the presenting signs of cardiac tamponade known as Beck’s triad: hypotension, jugular venous distension, and muffled heart sounds.³ TTE showed an ejection fraction of 65% and grade 2 diastolic dysfunction but no pericardial effusions (which accumulate rapidly in the patient with cardiac tamponade, resulting from fluid buildup in the pericardial layers),⁴ and TEE showed no atrial thrombi (which can masquerade as cardiac tamponade⁵). The patient had no signs of trauma and denied any history of malignancy (both potential causes of cardiac tamponade). Chest x-ray showed normal heart size and no pneumothorax, consolidations, or pleural effusions.^4,6-8 Thus, the diagnosis of cardiac tamponade was ruled out.

Common presenting symptoms of acute MI include sudden-onset chest pain, SOB, palpitations, dizziness, nausea, and/or vomiting. Women may experience less dramatic symptoms—often little more than SOB and fatigue.⁹ According to a 2000 consensus document from a joint European Society of Cardiology/American College of Cardiology committee¹⁰ in which MI was redefined, the diagnosis of MI relies on a rise in cardiac troponin levels, typical MI symptoms, and changes in ECG showing pathological Q waves or ST elevation or depression. The case patient’s troponin I level was less than 0.02 ng/mL, and ECG did not reveal Q waves or ST-T wave changes; additionally, since the patient had no chest pain, palpitations, diaphoresis, nausea, or vomiting, acute MI was ruled out.

Blood clots capable of blocking the pulmonary artery usually originate in the deep veins of the lower extremities.¹¹ Three main factors, called Virchow’s triad, are known to contribute to these deep vein thromboses (DVTs): venous stasis, endothelial injury, and a hypercoagulability state.^12,13 The patient had denied any trauma, recent travel, history of malignancy, or use of tobacco or oral contraceptives, and the result of her urine pregnancy test was negative. Even though the patient presented with tachypnea and acute SOB, with ECG showing right-axis deviation and tachycardia (common presenting signs and symptoms for PE), her chest CT showed no evidence of PE (see Figure 2); additionally, Doppler ultrasound of the bilateral lower extremities revealed no DVTs. Thus, PE was also excluded.

Tension pneumothorax was also ruled out, as chest x-ray showed neither mediastinal shift nor tracheal deviation, and the patient had denied any trauma. Laboratory analyses did not indicate hyponatremia, and the patient’s hemoglobin and hematocrit were satisfactory. She was tachycardic on admission, but her blood pressure was stable. As the patient denied any use of vasodilators or diuretics, hypovolemia was ruled out.

Patients experiencing asthma exacerbation can present with acute SOB, which usually resolves following use of IV steroids, nebulizer therapy, and inhaler treatments. Despite being administered IV methylprednisolone and magnesium sulfate in the ED, the patient experienced PEA and respiratory distress and required intubation for airway protection.

The HIV test was nonreactive, and blood and urine cultures did not show any growth. Results of tests for Legionella urinary antigen and Streptococcus pneumoniae antigen were negative. Sputum culture showed normal flora. Immunovirology testing, however, was positive for both influenza A and B antigens.

Chest X-ray showed no acute pulmonary pathology, nor did chest CT show any central, interlobar, or segmental embolism or mediastinal lymphadenopathy. It was determined that the patient’s acute SOB might represent asthma exacerbation secondary to influenza viral infection. Her PEA was attributed to possible acute pericarditis secondary to concomitant influenza A and B viral infection.

DISCUSSION
Currently, the CDC recognizes three types of influenza virus: A, B, and C.¹⁴ Only influenza A viruses are further classified into subtypes, based on the presence of surface proteins called hemagglutinin (HA) or neuraminidase (NA) glycoproteins. Humans can be infected by influenza A subtypes H1N1 and H3N2.¹⁴ Influenza B viruses, found mostly in humans, are associated with significant morbidity and mortality.

Influenza A and B viruses are further classified into strains that change with each flu season—thus, the need to update vaccinations against influenza A and B each year. No vaccination exists against influenza C virus, which is known to cause only mild illness in humans.¹⁵

In patients with asthma (as in the case patient), chronic bronchitis, or emphysema, infection with the influenza virus can manifest with SOB, in addition to the more common symptoms of fever, sore throat, headache, rhinorrhea, chills, muscle aches, and general discomfort.¹⁶ Patients with coronary artery disease, congestive heart failure (CHF), and/or a history of smoking may experience more severe symptoms and increased risk for influenza-associated mortality than do other patients.^17,18

Rare cardiac complications of influenza infections are myocarditis and benign acute pericarditis; myocarditis can progress to CHF and death.^19,20 A case of acute myopericarditis was reported by Proby et al²¹ in a patient with acute influenza A infection who developed pericardial effusions, myositis, tamponade, and pleurisy. That patient recovered after pericardiocentesis and administration of inotropic drugs.

In the literature, a few cases of acute pericarditis have been reported in association with administration of the influenza vaccination.^22,23

In the case patient, the diagnosis of influenza A and B was made following testing of nasal and nasopharyngeal swabs with an immunochromatographic assay that uses highly sensitive monoclonal antibodies to detect influenza A and B nucleoprotein antigens.^24,25

According to reports in the literature, two-thirds of cases of acute pericarditis are caused by infection, most commonly viral infection (including influenza virus, adenovirus, enterovirus, cytomegalovirus, hepatitis B virus, and herpes simplex virus).^26,27 Other etiologies for acute pericarditis are autoimmune (accounting for less than 10% of cases) and neoplastic conditions (5% to 7% of cases).²⁶

PATIENT OUTCOME
Consultation with an infectious disease specialist was obtained. The patient was placed under droplet isolation precautions and was started on a nebulizer, IV steroid treatments, and oseltamivir 75 mg by mouth every 12 hours. She was transferred to a medical floor, where she completed a five-day course of oseltamivir.

As a result of timely intervention, the patient was discharged in stable condition on a therapeutic regimen that included albuterol, fluticasone, and salmeterol inhalation, in addition to tapered-dose steroids. She was advised to follow up with her primary care provider and at the pulmonary clinic.

CONCLUSION
To our knowledge, this is the first reported case of acute pericarditis in a patient with concomitant acute infections with influenza A and B. According to conclusions reached in recent literature, further research is needed to explain the pathophysiology of influenza viral infections, associated cardiovascular morbidity and mortality, and the degree to which these can be prevented by influenza vaccination.^1,28 Also to be pursued through research is a better understanding of the morbidity and mortality associated with influenza viruses, especially in children and in adults affected by asthma, cardiac disease, and/or obesity.

REFERENCES
1. Finelli L, Chaves SS. Influenza and acute myocardial infarction. J Infect Dis. 2011;203(12):

1701-1704.

2. Steiger HV, Rimbach K, Müller E, Breitkreutz R. Focused emergency echocardiography: lifesaving tool for a 14-year-old girl suffering out-of-hospital pulseless electrical activity arrest because of cardiac tamponade. Eur J Emerg Med. 2009;16(2): 103-105.

3. Goodman A, Perera P, Mailhot T, Mandavia D. The role of bedside ultrasound in the diagnosis of pericardial effusion and cardiac tamponade.

J Emerg Trauma Shock. 2012;5(1):72-75.

4. Restrepo CS, Lemos DF, Lemos JA, et al. Imaging findings in cardiac tamponade with emphasis on CT. Radiographics. 2007;27(6):1595-1610.

5. Papanagnou D, Stone MB. Massive right atrial thrombus masquerading as cardiac tamponade. Acad Emerg Med. 2010;17(2):E11.

6. Saito Y, Donohue A, Attai S, et al. The syndrome of cardiac tamponade with “small” pericardial effusion. Echocardiography. 2008;25(3): 321-327.

7. Lin E, Boire A, Hemmige V, et al. Cardiac tamponade mimicking tuberculous pericarditis as the initial presentation of chronic lymphocytic leukemia in a 58-year-old woman: a case report. J Med Case Rep. 2010;4:246.

8. Meniconi A, Attenhofer Jost CH, Jenni R. How to survive myocardial rupture after myocardial infarction. Heart. 2000;84(5):552.

9. Kosuge M, Kimura K, Ishikawa T, et al. Differences between men and women in terms of clinical features of ST-segment elevation acute myocardial infarction. Circ J. 2006;70(3):222-226.

10. Alpert JS, Thygesen K, Antman E, Bassand JP. Myocardial infarction redefined: a consensus document of the Joint European Society of Cardiology/American College of Cardiology Committee for the redefinition of myocardial infarction. J Am Coll Cardiol. 2000;36(3):959-969.

11. Goldhaber SZ. Deep venous thrombosis and pulmonary thromboembolism. In: Fauci AS, Braunwald E, Kasper DL, et al. Harrison’s Principles of Internal Medicine. 17th ed. New York, NY: McGraw-Hill Medical; 2008:1651–1657.

12. Brooks EG, Trotman W, Wadsworth MP, et al. Valves of the deep venous system: an overlooked risk factor. Blood. 2009;114(6):1276-1279.

13. Kyrle PA, Eichinger S. Is Virchow’s triad complete? Blood. 2009;114(6):1138-1139.

14. CDC. Seasonal influenza (flu): types of influenza viruses (2012). www.cdc.gov/flu/about/viruses/types.htm. Accessed October 24, 2012.

15. CDC. Seasonal influenza (flu)(2012). www.cdc .gov/flu. Accessed October 24, 2012.

16. Eccles R. Understanding the symptoms of the common cold and influenza. Lancet Infect Dis. 2005;5(11):718-725.

17. Angelo SJ, Marshall PS, Chrissoheris MP, Chaves AM. Clinical characteristics associated with poor outcome in patients acutely infected with Influenza A. Conn Med. 2004;68(4):199-205.

18. Murin S, Bilello K. Respiratory tract infections: another reason not to smoke. Cleve Clin J Med. 2005;72(10):916-920.

19. Ray CG, Icenogle TB, Minnich LL, et al. The use of intravenous ribavirin to treat influenza virus–associated acute myocarditis. J Infect Dis. 1989; 159(5):829-836.

20. Fairley CK, Ryan M, Wall PG, Weinberg J. The organism reported to cause infective myocarditis and pericarditis in England and Wales. J Infect. 1996;32(3):223-225.

21. Proby CM, Hackett D, Gupta S, Cox TM. Acute myopericarditis in influenza A infection. Q J Med. 1986;60(233):887-892.

22. Streifler JJ, Dux S, Garty M, Rosenfeld JB. Recurrent pericarditis: a rare complication of influenza vaccination. Br Med J (Clin Res Ed). 1981; 283(6290):526-527.

23. Desson JF, Leprévost M, Vabret F, Davy A. Acute benign pericarditis after anti-influenza vaccination [in French]. Presse Med. 1997;26 (9):415.

24. BinaxNOW® Influenza A&B Test Kit (product instructions). www.diagnosticsdirect2u.com/images/PDF/Binax%20Now%20416-022%20PPI .pdf. Accessed October 24, 2012.

25. 510(k) Substantial Equivalence Determination Decision Summary [BinaxNow® Influenza A & B Test] (2009). www.accessdata.fda.gov/cdrh_docs/reviews/K062109.pdf. Accessed October 24, 2012.

26. Imazio M, Spodick DH, Brucato A, et al. Controversial issues in the management of pericardial diseases. Circulation. 2010;121(7):916-928.

27. Maisch B, Seferovic PM, Ristic AD, et al; Task Force on the Diagnosis and Management of Pericardial Diseases of the European Society of Cardiology. Guidelines on the diagnosis and management of pericardial diseases: executive summary. Eur Heart J. 2004;25(7):587-610.

28. McCullers JA, Hayden FG. Fatal influenza B infections: time to reexamine influenza research priorities. J Infect Dis. 2012;205(6):870-872.

On an autumn day, a 38-year-old woman with a history of asthma presented to the emergency department (ED) with the chief complaint of shortness of breath (SOB). The patient described her SOB as sudden in onset and not relieved by use of her albuterol inhaler; hence the ED visit.

She denied any chest pain, palpitations, dizziness, orthopnea, upper respiratory tract infection, cough, wheezing, fever or chills, headache, vision changes, body aches, sick contacts, or pets at home. She said she uses her albuterol inhaler as needed, and that she had used it that day for the first time in “a few months.” She denied any history of intubation or steroid use. Additionally, she had not been seen by a primary care provider in years.

The woman, a native of Ghana, had been living in the United States for many years. She denied any recent travel or exposure to toxic chemicals; any use of tobacco, alcohol, or illicit drugs; or any history of sexually transmitted disease.

The patient was afebrile (temperature, 98.6°F), with a respiratory rate of 20 breaths/min; blood pressure, 144/69 mm Hg; and ventricular rate, 125 beats/min. On physical examination, her extraocular movements were intact; pupils were equal, round, reactive to light and accommodation; and sclera were nonicteric. The patient’s head was normocephalic and atraumatic, and the neck was supple with normal range of motion and no jugular venous distension or lymphadenopathy. Her mucous membranes were moist with no pharyngeal erythema or exudates. Cardiovascular examination, including ECG, revealed tachycardia but no murmurs or gallops.

While being evaluated in the ED, the patient became tachypneic and began to experience respiratory distress. She was intubated for airway protection, at which time she developed pulseless electrical activity (PEA), with 30 beats/min. She responded to atropine and epinephrine injections. A repeat ECG showed sinus tachycardia and right atrial enlargement with right-axis deviation. Chest x-ray (see Figure 1) showed no consolidation, pleural effusion, or pneumothorax.

Results from the patient’s lab work are shown in the table, above. Negative results were reported for a urine pregnancy test.

Since there was no clear etiology for the patient’s PEA, she underwent pan-culturing, with the following tests ordered: HIV antibody testing, immunovirology for influenza A and B viruses, and urine toxicology. Doppler ultrasound of the bilateral lower extremities was also ordered, in addition to chest CT and transthoracic and transesophageal echocardiography (TTE and TEE, respectively). The patient was intubated and transferred to the medical ICU for further management.

The differential diagnosis included cardiac tamponade, acute MI, acute pulmonary embolus (PE), tension pneumothorax, hypovolemia, and asthma exacerbated by viral or bacterial infection.^1,2 Although the case patient presented with PEA, she did not have the presenting signs of cardiac tamponade known as Beck’s triad: hypotension, jugular venous distension, and muffled heart sounds.³ TTE showed an ejection fraction of 65% and grade 2 diastolic dysfunction but no pericardial effusions (which accumulate rapidly in the patient with cardiac tamponade, resulting from fluid buildup in the pericardial layers),⁴ and TEE showed no atrial thrombi (which can masquerade as cardiac tamponade⁵). The patient had no signs of trauma and denied any history of malignancy (both potential causes of cardiac tamponade). Chest x-ray showed normal heart size and no pneumothorax, consolidations, or pleural effusions.^4,6-8 Thus, the diagnosis of cardiac tamponade was ruled out.

Common presenting symptoms of acute MI include sudden-onset chest pain, SOB, palpitations, dizziness, nausea, and/or vomiting. Women may experience less dramatic symptoms—often little more than SOB and fatigue.⁹ According to a 2000 consensus document from a joint European Society of Cardiology/American College of Cardiology committee¹⁰ in which MI was redefined, the diagnosis of MI relies on a rise in cardiac troponin levels, typical MI symptoms, and changes in ECG showing pathological Q waves or ST elevation or depression. The case patient’s troponin I level was less than 0.02 ng/mL, and ECG did not reveal Q waves or ST-T wave changes; additionally, since the patient had no chest pain, palpitations, diaphoresis, nausea, or vomiting, acute MI was ruled out.

Blood clots capable of blocking the pulmonary artery usually originate in the deep veins of the lower extremities.¹¹ Three main factors, called Virchow’s triad, are known to contribute to these deep vein thromboses (DVTs): venous stasis, endothelial injury, and a hypercoagulability state.^12,13 The patient had denied any trauma, recent travel, history of malignancy, or use of tobacco or oral contraceptives, and the result of her urine pregnancy test was negative. Even though the patient presented with tachypnea and acute SOB, with ECG showing right-axis deviation and tachycardia (common presenting signs and symptoms for PE), her chest CT showed no evidence of PE (see Figure 2); additionally, Doppler ultrasound of the bilateral lower extremities revealed no DVTs. Thus, PE was also excluded.

Tension pneumothorax was also ruled out, as chest x-ray showed neither mediastinal shift nor tracheal deviation, and the patient had denied any trauma. Laboratory analyses did not indicate hyponatremia, and the patient’s hemoglobin and hematocrit were satisfactory. She was tachycardic on admission, but her blood pressure was stable. As the patient denied any use of vasodilators or diuretics, hypovolemia was ruled out.

Patients experiencing asthma exacerbation can present with acute SOB, which usually resolves following use of IV steroids, nebulizer therapy, and inhaler treatments. Despite being administered IV methylprednisolone and magnesium sulfate in the ED, the patient experienced PEA and respiratory distress and required intubation for airway protection.

The HIV test was nonreactive, and blood and urine cultures did not show any growth. Results of tests for Legionella urinary antigen and Streptococcus pneumoniae antigen were negative. Sputum culture showed normal flora. Immunovirology testing, however, was positive for both influenza A and B antigens.

Chest X-ray showed no acute pulmonary pathology, nor did chest CT show any central, interlobar, or segmental embolism or mediastinal lymphadenopathy. It was determined that the patient’s acute SOB might represent asthma exacerbation secondary to influenza viral infection. Her PEA was attributed to possible acute pericarditis secondary to concomitant influenza A and B viral infection.

DISCUSSION
Currently, the CDC recognizes three types of influenza virus: A, B, and C.¹⁴ Only influenza A viruses are further classified into subtypes, based on the presence of surface proteins called hemagglutinin (HA) or neuraminidase (NA) glycoproteins. Humans can be infected by influenza A subtypes H1N1 and H3N2.¹⁴ Influenza B viruses, found mostly in humans, are associated with significant morbidity and mortality.

Influenza A and B viruses are further classified into strains that change with each flu season—thus, the need to update vaccinations against influenza A and B each year. No vaccination exists against influenza C virus, which is known to cause only mild illness in humans.¹⁵

In patients with asthma (as in the case patient), chronic bronchitis, or emphysema, infection with the influenza virus can manifest with SOB, in addition to the more common symptoms of fever, sore throat, headache, rhinorrhea, chills, muscle aches, and general discomfort.¹⁶ Patients with coronary artery disease, congestive heart failure (CHF), and/or a history of smoking may experience more severe symptoms and increased risk for influenza-associated mortality than do other patients.^17,18

Rare cardiac complications of influenza infections are myocarditis and benign acute pericarditis; myocarditis can progress to CHF and death.^19,20 A case of acute myopericarditis was reported by Proby et al²¹ in a patient with acute influenza A infection who developed pericardial effusions, myositis, tamponade, and pleurisy. That patient recovered after pericardiocentesis and administration of inotropic drugs.

In the literature, a few cases of acute pericarditis have been reported in association with administration of the influenza vaccination.^22,23

In the case patient, the diagnosis of influenza A and B was made following testing of nasal and nasopharyngeal swabs with an immunochromatographic assay that uses highly sensitive monoclonal antibodies to detect influenza A and B nucleoprotein antigens.^24,25

According to reports in the literature, two-thirds of cases of acute pericarditis are caused by infection, most commonly viral infection (including influenza virus, adenovirus, enterovirus, cytomegalovirus, hepatitis B virus, and herpes simplex virus).^26,27 Other etiologies for acute pericarditis are autoimmune (accounting for less than 10% of cases) and neoplastic conditions (5% to 7% of cases).²⁶

PATIENT OUTCOME
Consultation with an infectious disease specialist was obtained. The patient was placed under droplet isolation precautions and was started on a nebulizer, IV steroid treatments, and oseltamivir 75 mg by mouth every 12 hours. She was transferred to a medical floor, where she completed a five-day course of oseltamivir.

As a result of timely intervention, the patient was discharged in stable condition on a therapeutic regimen that included albuterol, fluticasone, and salmeterol inhalation, in addition to tapered-dose steroids. She was advised to follow up with her primary care provider and at the pulmonary clinic.

CONCLUSION
To our knowledge, this is the first reported case of acute pericarditis in a patient with concomitant acute infections with influenza A and B. According to conclusions reached in recent literature, further research is needed to explain the pathophysiology of influenza viral infections, associated cardiovascular morbidity and mortality, and the degree to which these can be prevented by influenza vaccination.^1,28 Also to be pursued through research is a better understanding of the morbidity and mortality associated with influenza viruses, especially in children and in adults affected by asthma, cardiac disease, and/or obesity.

REFERENCES
1. Finelli L, Chaves SS. Influenza and acute myocardial infarction. J Infect Dis. 2011;203(12):

1701-1704.

2. Steiger HV, Rimbach K, Müller E, Breitkreutz R. Focused emergency echocardiography: lifesaving tool for a 14-year-old girl suffering out-of-hospital pulseless electrical activity arrest because of cardiac tamponade. Eur J Emerg Med. 2009;16(2): 103-105.

3. Goodman A, Perera P, Mailhot T, Mandavia D. The role of bedside ultrasound in the diagnosis of pericardial effusion and cardiac tamponade.

J Emerg Trauma Shock. 2012;5(1):72-75.

4. Restrepo CS, Lemos DF, Lemos JA, et al. Imaging findings in cardiac tamponade with emphasis on CT. Radiographics. 2007;27(6):1595-1610.

5. Papanagnou D, Stone MB. Massive right atrial thrombus masquerading as cardiac tamponade. Acad Emerg Med. 2010;17(2):E11.

6. Saito Y, Donohue A, Attai S, et al. The syndrome of cardiac tamponade with “small” pericardial effusion. Echocardiography. 2008;25(3): 321-327.

7. Lin E, Boire A, Hemmige V, et al. Cardiac tamponade mimicking tuberculous pericarditis as the initial presentation of chronic lymphocytic leukemia in a 58-year-old woman: a case report. J Med Case Rep. 2010;4:246.

8. Meniconi A, Attenhofer Jost CH, Jenni R. How to survive myocardial rupture after myocardial infarction. Heart. 2000;84(5):552.

9. Kosuge M, Kimura K, Ishikawa T, et al. Differences between men and women in terms of clinical features of ST-segment elevation acute myocardial infarction. Circ J. 2006;70(3):222-226.

10. Alpert JS, Thygesen K, Antman E, Bassand JP. Myocardial infarction redefined: a consensus document of the Joint European Society of Cardiology/American College of Cardiology Committee for the redefinition of myocardial infarction. J Am Coll Cardiol. 2000;36(3):959-969.

11. Goldhaber SZ. Deep venous thrombosis and pulmonary thromboembolism. In: Fauci AS, Braunwald E, Kasper DL, et al. Harrison’s Principles of Internal Medicine. 17th ed. New York, NY: McGraw-Hill Medical; 2008:1651–1657.

12. Brooks EG, Trotman W, Wadsworth MP, et al. Valves of the deep venous system: an overlooked risk factor. Blood. 2009;114(6):1276-1279.

13. Kyrle PA, Eichinger S. Is Virchow’s triad complete? Blood. 2009;114(6):1138-1139.

14. CDC. Seasonal influenza (flu): types of influenza viruses (2012). www.cdc.gov/flu/about/viruses/types.htm. Accessed October 24, 2012.

15. CDC. Seasonal influenza (flu)(2012). www.cdc .gov/flu. Accessed October 24, 2012.

16. Eccles R. Understanding the symptoms of the common cold and influenza. Lancet Infect Dis. 2005;5(11):718-725.

17. Angelo SJ, Marshall PS, Chrissoheris MP, Chaves AM. Clinical characteristics associated with poor outcome in patients acutely infected with Influenza A. Conn Med. 2004;68(4):199-205.

18. Murin S, Bilello K. Respiratory tract infections: another reason not to smoke. Cleve Clin J Med. 2005;72(10):916-920.

19. Ray CG, Icenogle TB, Minnich LL, et al. The use of intravenous ribavirin to treat influenza virus–associated acute myocarditis. J Infect Dis. 1989; 159(5):829-836.

20. Fairley CK, Ryan M, Wall PG, Weinberg J. The organism reported to cause infective myocarditis and pericarditis in England and Wales. J Infect. 1996;32(3):223-225.

21. Proby CM, Hackett D, Gupta S, Cox TM. Acute myopericarditis in influenza A infection. Q J Med. 1986;60(233):887-892.

22. Streifler JJ, Dux S, Garty M, Rosenfeld JB. Recurrent pericarditis: a rare complication of influenza vaccination. Br Med J (Clin Res Ed). 1981; 283(6290):526-527.

23. Desson JF, Leprévost M, Vabret F, Davy A. Acute benign pericarditis after anti-influenza vaccination [in French]. Presse Med. 1997;26 (9):415.

24. BinaxNOW® Influenza A&B Test Kit (product instructions). www.diagnosticsdirect2u.com/images/PDF/Binax%20Now%20416-022%20PPI .pdf. Accessed October 24, 2012.

25. 510(k) Substantial Equivalence Determination Decision Summary [BinaxNow® Influenza A & B Test] (2009). www.accessdata.fda.gov/cdrh_docs/reviews/K062109.pdf. Accessed October 24, 2012.

26. Imazio M, Spodick DH, Brucato A, et al. Controversial issues in the management of pericardial diseases. Circulation. 2010;121(7):916-928.

27. Maisch B, Seferovic PM, Ristic AD, et al; Task Force on the Diagnosis and Management of Pericardial Diseases of the European Society of Cardiology. Guidelines on the diagnosis and management of pericardial diseases: executive summary. Eur Heart J. 2004;25(7):587-610.

28. McCullers JA, Hayden FG. Fatal influenza B infections: time to reexamine influenza research priorities. J Infect Dis. 2012;205(6):870-872.

On an autumn day, a 38-year-old woman with a history of asthma presented to the emergency department (ED) with the chief complaint of shortness of breath (SOB). The patient described her SOB as sudden in onset and not relieved by use of her albuterol inhaler; hence the ED visit.

She denied any chest pain, palpitations, dizziness, orthopnea, upper respiratory tract infection, cough, wheezing, fever or chills, headache, vision changes, body aches, sick contacts, or pets at home. She said she uses her albuterol inhaler as needed, and that she had used it that day for the first time in “a few months.” She denied any history of intubation or steroid use. Additionally, she had not been seen by a primary care provider in years.

The woman, a native of Ghana, had been living in the United States for many years. She denied any recent travel or exposure to toxic chemicals; any use of tobacco, alcohol, or illicit drugs; or any history of sexually transmitted disease.

The patient was afebrile (temperature, 98.6°F), with a respiratory rate of 20 breaths/min; blood pressure, 144/69 mm Hg; and ventricular rate, 125 beats/min. On physical examination, her extraocular movements were intact; pupils were equal, round, reactive to light and accommodation; and sclera were nonicteric. The patient’s head was normocephalic and atraumatic, and the neck was supple with normal range of motion and no jugular venous distension or lymphadenopathy. Her mucous membranes were moist with no pharyngeal erythema or exudates. Cardiovascular examination, including ECG, revealed tachycardia but no murmurs or gallops.

While being evaluated in the ED, the patient became tachypneic and began to experience respiratory distress. She was intubated for airway protection, at which time she developed pulseless electrical activity (PEA), with 30 beats/min. She responded to atropine and epinephrine injections. A repeat ECG showed sinus tachycardia and right atrial enlargement with right-axis deviation. Chest x-ray (see Figure 1) showed no consolidation, pleural effusion, or pneumothorax.

Results from the patient’s lab work are shown in the table, above. Negative results were reported for a urine pregnancy test.

Since there was no clear etiology for the patient’s PEA, she underwent pan-culturing, with the following tests ordered: HIV antibody testing, immunovirology for influenza A and B viruses, and urine toxicology. Doppler ultrasound of the bilateral lower extremities was also ordered, in addition to chest CT and transthoracic and transesophageal echocardiography (TTE and TEE, respectively). The patient was intubated and transferred to the medical ICU for further management.

The differential diagnosis included cardiac tamponade, acute MI, acute pulmonary embolus (PE), tension pneumothorax, hypovolemia, and asthma exacerbated by viral or bacterial infection.^1,2 Although the case patient presented with PEA, she did not have the presenting signs of cardiac tamponade known as Beck’s triad: hypotension, jugular venous distension, and muffled heart sounds.³ TTE showed an ejection fraction of 65% and grade 2 diastolic dysfunction but no pericardial effusions (which accumulate rapidly in the patient with cardiac tamponade, resulting from fluid buildup in the pericardial layers),⁴ and TEE showed no atrial thrombi (which can masquerade as cardiac tamponade⁵). The patient had no signs of trauma and denied any history of malignancy (both potential causes of cardiac tamponade). Chest x-ray showed normal heart size and no pneumothorax, consolidations, or pleural effusions.^4,6-8 Thus, the diagnosis of cardiac tamponade was ruled out.

Common presenting symptoms of acute MI include sudden-onset chest pain, SOB, palpitations, dizziness, nausea, and/or vomiting. Women may experience less dramatic symptoms—often little more than SOB and fatigue.⁹ According to a 2000 consensus document from a joint European Society of Cardiology/American College of Cardiology committee¹⁰ in which MI was redefined, the diagnosis of MI relies on a rise in cardiac troponin levels, typical MI symptoms, and changes in ECG showing pathological Q waves or ST elevation or depression. The case patient’s troponin I level was less than 0.02 ng/mL, and ECG did not reveal Q waves or ST-T wave changes; additionally, since the patient had no chest pain, palpitations, diaphoresis, nausea, or vomiting, acute MI was ruled out.

Blood clots capable of blocking the pulmonary artery usually originate in the deep veins of the lower extremities.¹¹ Three main factors, called Virchow’s triad, are known to contribute to these deep vein thromboses (DVTs): venous stasis, endothelial injury, and a hypercoagulability state.^12,13 The patient had denied any trauma, recent travel, history of malignancy, or use of tobacco or oral contraceptives, and the result of her urine pregnancy test was negative. Even though the patient presented with tachypnea and acute SOB, with ECG showing right-axis deviation and tachycardia (common presenting signs and symptoms for PE), her chest CT showed no evidence of PE (see Figure 2); additionally, Doppler ultrasound of the bilateral lower extremities revealed no DVTs. Thus, PE was also excluded.

Tension pneumothorax was also ruled out, as chest x-ray showed neither mediastinal shift nor tracheal deviation, and the patient had denied any trauma. Laboratory analyses did not indicate hyponatremia, and the patient’s hemoglobin and hematocrit were satisfactory. She was tachycardic on admission, but her blood pressure was stable. As the patient denied any use of vasodilators or diuretics, hypovolemia was ruled out.

Patients experiencing asthma exacerbation can present with acute SOB, which usually resolves following use of IV steroids, nebulizer therapy, and inhaler treatments. Despite being administered IV methylprednisolone and magnesium sulfate in the ED, the patient experienced PEA and respiratory distress and required intubation for airway protection.

The HIV test was nonreactive, and blood and urine cultures did not show any growth. Results of tests for Legionella urinary antigen and Streptococcus pneumoniae antigen were negative. Sputum culture showed normal flora. Immunovirology testing, however, was positive for both influenza A and B antigens.

Chest X-ray showed no acute pulmonary pathology, nor did chest CT show any central, interlobar, or segmental embolism or mediastinal lymphadenopathy. It was determined that the patient’s acute SOB might represent asthma exacerbation secondary to influenza viral infection. Her PEA was attributed to possible acute pericarditis secondary to concomitant influenza A and B viral infection.

DISCUSSION
Currently, the CDC recognizes three types of influenza virus: A, B, and C.¹⁴ Only influenza A viruses are further classified into subtypes, based on the presence of surface proteins called hemagglutinin (HA) or neuraminidase (NA) glycoproteins. Humans can be infected by influenza A subtypes H1N1 and H3N2.¹⁴ Influenza B viruses, found mostly in humans, are associated with significant morbidity and mortality.

Influenza A and B viruses are further classified into strains that change with each flu season—thus, the need to update vaccinations against influenza A and B each year. No vaccination exists against influenza C virus, which is known to cause only mild illness in humans.¹⁵

In patients with asthma (as in the case patient), chronic bronchitis, or emphysema, infection with the influenza virus can manifest with SOB, in addition to the more common symptoms of fever, sore throat, headache, rhinorrhea, chills, muscle aches, and general discomfort.¹⁶ Patients with coronary artery disease, congestive heart failure (CHF), and/or a history of smoking may experience more severe symptoms and increased risk for influenza-associated mortality than do other patients.^17,18

Rare cardiac complications of influenza infections are myocarditis and benign acute pericarditis; myocarditis can progress to CHF and death.^19,20 A case of acute myopericarditis was reported by Proby et al²¹ in a patient with acute influenza A infection who developed pericardial effusions, myositis, tamponade, and pleurisy. That patient recovered after pericardiocentesis and administration of inotropic drugs.

In the literature, a few cases of acute pericarditis have been reported in association with administration of the influenza vaccination.^22,23

In the case patient, the diagnosis of influenza A and B was made following testing of nasal and nasopharyngeal swabs with an immunochromatographic assay that uses highly sensitive monoclonal antibodies to detect influenza A and B nucleoprotein antigens.^24,25

According to reports in the literature, two-thirds of cases of acute pericarditis are caused by infection, most commonly viral infection (including influenza virus, adenovirus, enterovirus, cytomegalovirus, hepatitis B virus, and herpes simplex virus).^26,27 Other etiologies for acute pericarditis are autoimmune (accounting for less than 10% of cases) and neoplastic conditions (5% to 7% of cases).²⁶

PATIENT OUTCOME
Consultation with an infectious disease specialist was obtained. The patient was placed under droplet isolation precautions and was started on a nebulizer, IV steroid treatments, and oseltamivir 75 mg by mouth every 12 hours. She was transferred to a medical floor, where she completed a five-day course of oseltamivir.

As a result of timely intervention, the patient was discharged in stable condition on a therapeutic regimen that included albuterol, fluticasone, and salmeterol inhalation, in addition to tapered-dose steroids. She was advised to follow up with her primary care provider and at the pulmonary clinic.

CONCLUSION
To our knowledge, this is the first reported case of acute pericarditis in a patient with concomitant acute infections with influenza A and B. According to conclusions reached in recent literature, further research is needed to explain the pathophysiology of influenza viral infections, associated cardiovascular morbidity and mortality, and the degree to which these can be prevented by influenza vaccination.^1,28 Also to be pursued through research is a better understanding of the morbidity and mortality associated with influenza viruses, especially in children and in adults affected by asthma, cardiac disease, and/or obesity.

REFERENCES
1. Finelli L, Chaves SS. Influenza and acute myocardial infarction. J Infect Dis. 2011;203(12):

1701-1704.

2. Steiger HV, Rimbach K, Müller E, Breitkreutz R. Focused emergency echocardiography: lifesaving tool for a 14-year-old girl suffering out-of-hospital pulseless electrical activity arrest because of cardiac tamponade. Eur J Emerg Med. 2009;16(2): 103-105.

3. Goodman A, Perera P, Mailhot T, Mandavia D. The role of bedside ultrasound in the diagnosis of pericardial effusion and cardiac tamponade.

J Emerg Trauma Shock. 2012;5(1):72-75.

4. Restrepo CS, Lemos DF, Lemos JA, et al. Imaging findings in cardiac tamponade with emphasis on CT. Radiographics. 2007;27(6):1595-1610.

5. Papanagnou D, Stone MB. Massive right atrial thrombus masquerading as cardiac tamponade. Acad Emerg Med. 2010;17(2):E11.

6. Saito Y, Donohue A, Attai S, et al. The syndrome of cardiac tamponade with “small” pericardial effusion. Echocardiography. 2008;25(3): 321-327.

7. Lin E, Boire A, Hemmige V, et al. Cardiac tamponade mimicking tuberculous pericarditis as the initial presentation of chronic lymphocytic leukemia in a 58-year-old woman: a case report. J Med Case Rep. 2010;4:246.

8. Meniconi A, Attenhofer Jost CH, Jenni R. How to survive myocardial rupture after myocardial infarction. Heart. 2000;84(5):552.

9. Kosuge M, Kimura K, Ishikawa T, et al. Differences between men and women in terms of clinical features of ST-segment elevation acute myocardial infarction. Circ J. 2006;70(3):222-226.

10. Alpert JS, Thygesen K, Antman E, Bassand JP. Myocardial infarction redefined: a consensus document of the Joint European Society of Cardiology/American College of Cardiology Committee for the redefinition of myocardial infarction. J Am Coll Cardiol. 2000;36(3):959-969.

11. Goldhaber SZ. Deep venous thrombosis and pulmonary thromboembolism. In: Fauci AS, Braunwald E, Kasper DL, et al. Harrison’s Principles of Internal Medicine. 17th ed. New York, NY: McGraw-Hill Medical; 2008:1651–1657.

12. Brooks EG, Trotman W, Wadsworth MP, et al. Valves of the deep venous system: an overlooked risk factor. Blood. 2009;114(6):1276-1279.

13. Kyrle PA, Eichinger S. Is Virchow’s triad complete? Blood. 2009;114(6):1138-1139.

14. CDC. Seasonal influenza (flu): types of influenza viruses (2012). www.cdc.gov/flu/about/viruses/types.htm. Accessed October 24, 2012.

15. CDC. Seasonal influenza (flu)(2012). www.cdc .gov/flu. Accessed October 24, 2012.

16. Eccles R. Understanding the symptoms of the common cold and influenza. Lancet Infect Dis. 2005;5(11):718-725.

17. Angelo SJ, Marshall PS, Chrissoheris MP, Chaves AM. Clinical characteristics associated with poor outcome in patients acutely infected with Influenza A. Conn Med. 2004;68(4):199-205.

18. Murin S, Bilello K. Respiratory tract infections: another reason not to smoke. Cleve Clin J Med. 2005;72(10):916-920.

19. Ray CG, Icenogle TB, Minnich LL, et al. The use of intravenous ribavirin to treat influenza virus–associated acute myocarditis. J Infect Dis. 1989; 159(5):829-836.

20. Fairley CK, Ryan M, Wall PG, Weinberg J. The organism reported to cause infective myocarditis and pericarditis in England and Wales. J Infect. 1996;32(3):223-225.

21. Proby CM, Hackett D, Gupta S, Cox TM. Acute myopericarditis in influenza A infection. Q J Med. 1986;60(233):887-892.

22. Streifler JJ, Dux S, Garty M, Rosenfeld JB. Recurrent pericarditis: a rare complication of influenza vaccination. Br Med J (Clin Res Ed). 1981; 283(6290):526-527.

23. Desson JF, Leprévost M, Vabret F, Davy A. Acute benign pericarditis after anti-influenza vaccination [in French]. Presse Med. 1997;26 (9):415.

24. BinaxNOW® Influenza A&B Test Kit (product instructions). www.diagnosticsdirect2u.com/images/PDF/Binax%20Now%20416-022%20PPI .pdf. Accessed October 24, 2012.

25. 510(k) Substantial Equivalence Determination Decision Summary [BinaxNow® Influenza A & B Test] (2009). www.accessdata.fda.gov/cdrh_docs/reviews/K062109.pdf. Accessed October 24, 2012.

26. Imazio M, Spodick DH, Brucato A, et al. Controversial issues in the management of pericardial diseases. Circulation. 2010;121(7):916-928.

27. Maisch B, Seferovic PM, Ristic AD, et al; Task Force on the Diagnosis and Management of Pericardial Diseases of the European Society of Cardiology. Guidelines on the diagnosis and management of pericardial diseases: executive summary. Eur Heart J. 2004;25(7):587-610.

28. McCullers JA, Hayden FG. Fatal influenza B infections: time to reexamine influenza research priorities. J Infect Dis. 2012;205(6):870-872.

CASE: Behavioral changes

Mr. K, age 45, is brought to the emergency department (ED) by his wife for severe paranoia, combative behavior, confusion, and slowed cognition. Mr. K tells the ED staff that a chemical abrasion he sustained a few weeks earlier has spread to his penis, and insists that his penis is retracting into his body. He has tied a string around his penis to keep it from disappearing into his body. According to Mr. K’s wife, he went to an urgent care clinic 2 weeks ago after he sustained chemical abrasions from exposure to cleaning solution at home. The provider at the urgent care clinic started Mr. K on an unknown dose of oral prednisone.

Mr. K’s wife reports that her husband had a dysphoric episode approximately 6 months ago when his business was struggling but his mood improved without psychiatric care. Mr. K’s medical history includes episodic sarcoidosis of the eyes, skin, and lungs. In the past these symptoms remitted after he received oral prednisone.

ED clinicians consider neurosarcoidosis and substance-induced delirium in the differential diagnosis (Table).¹ A CT scan of the head fails to show lesions suggestive of neurosarcoidosis. Chest radiography does not reveal lesions suggestive of lung sarcoids and Mr. K has no skin lesions.

Table

DSM-IV-TR criteria for substance-induced delirium

Mr. K is admitted to the psychiatric inpatient unit for acute stabilization, where he remains aggressive and combative. He throws chairs at his peers and staff on the unit and is placed in physical restraints. He requires several doses of IM haloperidol, 5 mg, lorazepam, 2 mg, and diphenhydramine, 50 mg, for severe agitation. Mr. K is guarded, perseverative, and selectively mute. He avoids eye contact and has poor grooming. He has slow thought processing and displays concrete thought process. Prednisone is discontinued and olanzapine, titrated to 30 mg/d, and mirtazapine, titrated to 30 mg/d, are started for psychosis and depression.

Mr. K’s mood and behavior eventually return to baseline but slowed cognition persists. He is discharged from our facility.

The authors’ observations

Cortisone was first used to treat rheumatoid arthritis in 1948 and corticosteroids have been linked to multiple neuropsychiatric complications that have been broadly defined as steroid psychosis. This syndrome includes reversible behavioral manifestations such as hypomania, irritability, mood reactivity, anxiety, and insomnia in addition to more severe symptoms such as depression, mania, and psychosis.² Although mild cognitive deficits have been noted in patients taking corticosteroids, most published cases have focused on steroid-induced psychosis.

In 1984, Varney et al³ noted a phenomenon they called “steroid dementia” in 6 patients treated with corticosteroids. On first evaluation, these patients presented with symptoms similar to early Alzheimer’s dementia—impaired memory, attention, and concentration. Three patients initially were diagnosed first with Alzheimer’s dementia until their symptoms spontaneously improved when steroids were reduced or discontinued. Although their presentation resembled Alzheimer’s dementia, patients with steroid dementia had a specific cognitive presentation associated with corticosteroid use. Symptoms included impaired verbal memory and spatial thinking but normal procedural memory. These patients showed intact immediate recall but impaired delayed recall with difficulty tracking conversations and word finding. Overall, patients with steroid dementia showed a predominance of verbal declarative memory deficits out of proportion to other cognitive symptoms. These symptoms and recent corticosteroid exposure differentiated steroid dementia from other forms of dementia.

In a later article, Varney reviewed electroencephalography (EEG) and CT findings associated with steroid dementia, noting bilateral EEG abnormalities and acute cortical atrophy on CT.⁴ Steroid dementia largely was reversible, resolving 3 to 11 months after corticosteroid discontinuation. Additionally, Varney noted that patients who had psychosis and dementia had more severe and longer-lasting dementia.

TREATMENT: Progressive decline

Mr. K is college educated, has been married for 15 years, has 2 children, age 9 and 11, and owns a successful basketball coaching business. He has no history of substance abuse, legal issues, or violence. He reports a good childhood with normal developmental milestones and no history of trauma.

In the 6 months after his initial psychiatric admission, Mr. K sees various outpatient providers, who change his psychotropics multiple times. He also receives 4 courses of prednisone for ocular sarcoidosis. He is admitted twice to other psychiatric facilities. After he has paranoid interactions with colleagues and families of the youth he coaches, his business fails.

After his third psychiatric inpatient hospitalization, Mr. K becomes severely paranoid, believing his wife is having an affair. He becomes physically abusive to his wife, who obtains a restraining order and leaves with their children. Mr. K barely leaves his house and stops grooming. A friend notes that Mr. K’s home has become uninhabitable, and it goes into foreclosure. After Mr. K’s neighbors report combative behavior and paranoia, police bring him in on an involuntary hold for a fourth psychiatric hospitalization (the second in our facility).

During this hospitalization—6 months after the initial ED presentation—the neurology team conducts a repeat medical workup. EEG shows generalized slowing. Head CT and MRI show diffuse cortical atrophy that was not seen in previous imaging. Mr. K has ocular lesions characteristic of ocular sarcoidosis. His mental status examination is similar to his first presentation except that the psychosis and thought disorganization are considerably worse. His cognitive functioning also shows significant decline. Cognitive screening reveals intact remote memory with impaired recent memory. His thinking is concrete and his verbal memory is markedly impaired. His Mini-Mental State Examination score is 27/30, indicating functional capacity that is better than his clinical presentation. Because of difficulty with concentration and verbal processing, Mr. K is unable to complete the Minnesota Multiphasic Personality Inventory despite substantial assistance. On most days he cannot recall recent conversations with his wife, staff, or physicians. He is taking no medications at this time.

Mr. K is restarted on olanzapine, titrated to 30 mg/d, to control his psychosis; this medication was effective during his last stay in our facility. Oral prednisone is discontinued and methotrexate, 10 mg/week, is initiated for ocular sarcoidosis. Based on recommendations from a case series report,⁵ we start Mr. K on lithium, titrated to 600 mg twice a day, for steroid-induced mood symptoms, Mr. K’s psychosis and mood improve dramatically once he reaches a therapeutic lithium level; however, his cognition remains slowed and he is unable to care for his basic needs.

The authors’ observations

Steroid dementia may be the result of effects in the medial temporal lobe, specifically dorsolateral prefrontal cortex, which impairs working memory, and the parahippocampal gyrus.^6,7 The cognitive presentation of steroid dementia Varney et al³ described has been replicated in healthy volunteers who received corticosteroids.³ Patients with Cushing’s syndrome also have been noted to have diminished hippocampal volume and similar cognitive deficits. Cognitive impairment experienced by patients treated with corticosteroids may be caused by neuronal death in the hippocampus and dorsolateral prefrontal cortex. The etiology of cell death is multifactorial and includes glutamate-mediated excitotoxicity, activation of proinflammatory pathways, inhibited utilization of glucose in the hippocampus, telomere shortening, and diminished cell repair by brain-derived neurotrophic factor. The net result is significant, widespread damage that in some cases is irreversible.⁸

Because of the severity of Mr. K’s psychosis and personality change from baseline, his cognitive symptoms were largely overlooked during his first psychiatric hospitalization. The affective flattening, delayed verbal response, and markedly concrete thought process were considered within the spectrum of resolving psychosis. After further hospitalizations and abnormal results on cognitive testing, Mr. K’s cognitive impairment was fully noted. His symptoms match those of previously documented cases of steroid dementia, including verbal deficits out of proportion to other impairment, acute cerebral atrophy on CT after corticosteroid treatment, and gradual improvement of symptoms when corticosteroids were discontinued.

Management recommendations

Educate patients taking steroids about possible side effects of mood changes, psychosis, and cognitive deficits. Close monitoring of patients on corticosteroids is paramount. If psychiatric or cognitive symptoms develop, gradually discontinue the corticosteroid and seek other treatments.

Randomized, placebo-controlled trials of lamotrigine and memantine have shown these medications are cognitively protective for patients taking prednisone.⁹

OUTCOME: Long-term deficits

After a 33-day stay in our adult inpatient psychiatric facility, the county places Mr. K in a permanent conservatorship for severe grave disability. He is discharged to a long-term psychiatric care locked facility for ongoing management. Mr. K spends 20 months in the long-term care facility while his family remains hopeful for his recovery and return home. He is admitted to our facility for acute stabilization of psychotic symptoms after he is released from the locked facility. Although no imaging studies are conducted, he remains significantly forgetful. Additionally, his paranoia persists.

Mr. K is poorly compliant with his psychotropics, which include divalproex, 1,000 mg/d, and olanzapine, 30 mg/d. Although he is discharged home with his family, his functional capacity is less than expected and he requires continuous support. Insisting that Mr. K abstain from steroids after the first psychiatric hospitalization might have prevented this seemingly irreversible dementia.

Related Resources

• Sacks O, Shulman M. Steroid dementia: an overlooked diagnosis? Neurology. 2005;64(4):707-709.
• Cipriani G, Picchi L, Vedovello M, et al. Reversible dementia from corticosteroid therapy. Clinical Geriatrics. 2012;20(7):38-41.

Drug Brand Names

• Diphenhydramine • Benadryl
• Divalproex • Depakote
• Haloperidol • Haldol
• Lamotrigine • Lamictal
• Lithium • Eskalith, Lithobid
• Lorazepam • Ativan
• Memantine • Namenda
• Methotrexate • Rheumatrex, Trexall
• Mirtazapine • Remeron
• Olanzapine • Zyprexa
• Prednisone • Deltasone, Meticorten, others

Disclosure

The authors report no financial relationship with any company whose products are mentioned in this article or with manufacturers of competing products.

CASE: Behavioral changes

Mr. K, age 45, is brought to the emergency department (ED) by his wife for severe paranoia, combative behavior, confusion, and slowed cognition. Mr. K tells the ED staff that a chemical abrasion he sustained a few weeks earlier has spread to his penis, and insists that his penis is retracting into his body. He has tied a string around his penis to keep it from disappearing into his body. According to Mr. K’s wife, he went to an urgent care clinic 2 weeks ago after he sustained chemical abrasions from exposure to cleaning solution at home. The provider at the urgent care clinic started Mr. K on an unknown dose of oral prednisone.

Mr. K’s wife reports that her husband had a dysphoric episode approximately 6 months ago when his business was struggling but his mood improved without psychiatric care. Mr. K’s medical history includes episodic sarcoidosis of the eyes, skin, and lungs. In the past these symptoms remitted after he received oral prednisone.

ED clinicians consider neurosarcoidosis and substance-induced delirium in the differential diagnosis (Table).¹ A CT scan of the head fails to show lesions suggestive of neurosarcoidosis. Chest radiography does not reveal lesions suggestive of lung sarcoids and Mr. K has no skin lesions.

Table

DSM-IV-TR criteria for substance-induced delirium

Mr. K is admitted to the psychiatric inpatient unit for acute stabilization, where he remains aggressive and combative. He throws chairs at his peers and staff on the unit and is placed in physical restraints. He requires several doses of IM haloperidol, 5 mg, lorazepam, 2 mg, and diphenhydramine, 50 mg, for severe agitation. Mr. K is guarded, perseverative, and selectively mute. He avoids eye contact and has poor grooming. He has slow thought processing and displays concrete thought process. Prednisone is discontinued and olanzapine, titrated to 30 mg/d, and mirtazapine, titrated to 30 mg/d, are started for psychosis and depression.

Mr. K’s mood and behavior eventually return to baseline but slowed cognition persists. He is discharged from our facility.

The authors’ observations

Cortisone was first used to treat rheumatoid arthritis in 1948 and corticosteroids have been linked to multiple neuropsychiatric complications that have been broadly defined as steroid psychosis. This syndrome includes reversible behavioral manifestations such as hypomania, irritability, mood reactivity, anxiety, and insomnia in addition to more severe symptoms such as depression, mania, and psychosis.² Although mild cognitive deficits have been noted in patients taking corticosteroids, most published cases have focused on steroid-induced psychosis.

In 1984, Varney et al³ noted a phenomenon they called “steroid dementia” in 6 patients treated with corticosteroids. On first evaluation, these patients presented with symptoms similar to early Alzheimer’s dementia—impaired memory, attention, and concentration. Three patients initially were diagnosed first with Alzheimer’s dementia until their symptoms spontaneously improved when steroids were reduced or discontinued. Although their presentation resembled Alzheimer’s dementia, patients with steroid dementia had a specific cognitive presentation associated with corticosteroid use. Symptoms included impaired verbal memory and spatial thinking but normal procedural memory. These patients showed intact immediate recall but impaired delayed recall with difficulty tracking conversations and word finding. Overall, patients with steroid dementia showed a predominance of verbal declarative memory deficits out of proportion to other cognitive symptoms. These symptoms and recent corticosteroid exposure differentiated steroid dementia from other forms of dementia.

In a later article, Varney reviewed electroencephalography (EEG) and CT findings associated with steroid dementia, noting bilateral EEG abnormalities and acute cortical atrophy on CT.⁴ Steroid dementia largely was reversible, resolving 3 to 11 months after corticosteroid discontinuation. Additionally, Varney noted that patients who had psychosis and dementia had more severe and longer-lasting dementia.

TREATMENT: Progressive decline

Mr. K is college educated, has been married for 15 years, has 2 children, age 9 and 11, and owns a successful basketball coaching business. He has no history of substance abuse, legal issues, or violence. He reports a good childhood with normal developmental milestones and no history of trauma.

In the 6 months after his initial psychiatric admission, Mr. K sees various outpatient providers, who change his psychotropics multiple times. He also receives 4 courses of prednisone for ocular sarcoidosis. He is admitted twice to other psychiatric facilities. After he has paranoid interactions with colleagues and families of the youth he coaches, his business fails.

After his third psychiatric inpatient hospitalization, Mr. K becomes severely paranoid, believing his wife is having an affair. He becomes physically abusive to his wife, who obtains a restraining order and leaves with their children. Mr. K barely leaves his house and stops grooming. A friend notes that Mr. K’s home has become uninhabitable, and it goes into foreclosure. After Mr. K’s neighbors report combative behavior and paranoia, police bring him in on an involuntary hold for a fourth psychiatric hospitalization (the second in our facility).

During this hospitalization—6 months after the initial ED presentation—the neurology team conducts a repeat medical workup. EEG shows generalized slowing. Head CT and MRI show diffuse cortical atrophy that was not seen in previous imaging. Mr. K has ocular lesions characteristic of ocular sarcoidosis. His mental status examination is similar to his first presentation except that the psychosis and thought disorganization are considerably worse. His cognitive functioning also shows significant decline. Cognitive screening reveals intact remote memory with impaired recent memory. His thinking is concrete and his verbal memory is markedly impaired. His Mini-Mental State Examination score is 27/30, indicating functional capacity that is better than his clinical presentation. Because of difficulty with concentration and verbal processing, Mr. K is unable to complete the Minnesota Multiphasic Personality Inventory despite substantial assistance. On most days he cannot recall recent conversations with his wife, staff, or physicians. He is taking no medications at this time.

Mr. K is restarted on olanzapine, titrated to 30 mg/d, to control his psychosis; this medication was effective during his last stay in our facility. Oral prednisone is discontinued and methotrexate, 10 mg/week, is initiated for ocular sarcoidosis. Based on recommendations from a case series report,⁵ we start Mr. K on lithium, titrated to 600 mg twice a day, for steroid-induced mood symptoms, Mr. K’s psychosis and mood improve dramatically once he reaches a therapeutic lithium level; however, his cognition remains slowed and he is unable to care for his basic needs.

The authors’ observations

Steroid dementia may be the result of effects in the medial temporal lobe, specifically dorsolateral prefrontal cortex, which impairs working memory, and the parahippocampal gyrus.^6,7 The cognitive presentation of steroid dementia Varney et al³ described has been replicated in healthy volunteers who received corticosteroids.³ Patients with Cushing’s syndrome also have been noted to have diminished hippocampal volume and similar cognitive deficits. Cognitive impairment experienced by patients treated with corticosteroids may be caused by neuronal death in the hippocampus and dorsolateral prefrontal cortex. The etiology of cell death is multifactorial and includes glutamate-mediated excitotoxicity, activation of proinflammatory pathways, inhibited utilization of glucose in the hippocampus, telomere shortening, and diminished cell repair by brain-derived neurotrophic factor. The net result is significant, widespread damage that in some cases is irreversible.⁸

Because of the severity of Mr. K’s psychosis and personality change from baseline, his cognitive symptoms were largely overlooked during his first psychiatric hospitalization. The affective flattening, delayed verbal response, and markedly concrete thought process were considered within the spectrum of resolving psychosis. After further hospitalizations and abnormal results on cognitive testing, Mr. K’s cognitive impairment was fully noted. His symptoms match those of previously documented cases of steroid dementia, including verbal deficits out of proportion to other impairment, acute cerebral atrophy on CT after corticosteroid treatment, and gradual improvement of symptoms when corticosteroids were discontinued.

Management recommendations

Educate patients taking steroids about possible side effects of mood changes, psychosis, and cognitive deficits. Close monitoring of patients on corticosteroids is paramount. If psychiatric or cognitive symptoms develop, gradually discontinue the corticosteroid and seek other treatments.

Randomized, placebo-controlled trials of lamotrigine and memantine have shown these medications are cognitively protective for patients taking prednisone.⁹

OUTCOME: Long-term deficits

After a 33-day stay in our adult inpatient psychiatric facility, the county places Mr. K in a permanent conservatorship for severe grave disability. He is discharged to a long-term psychiatric care locked facility for ongoing management. Mr. K spends 20 months in the long-term care facility while his family remains hopeful for his recovery and return home. He is admitted to our facility for acute stabilization of psychotic symptoms after he is released from the locked facility. Although no imaging studies are conducted, he remains significantly forgetful. Additionally, his paranoia persists.

Mr. K is poorly compliant with his psychotropics, which include divalproex, 1,000 mg/d, and olanzapine, 30 mg/d. Although he is discharged home with his family, his functional capacity is less than expected and he requires continuous support. Insisting that Mr. K abstain from steroids after the first psychiatric hospitalization might have prevented this seemingly irreversible dementia.

Related Resources

• Sacks O, Shulman M. Steroid dementia: an overlooked diagnosis? Neurology. 2005;64(4):707-709.
• Cipriani G, Picchi L, Vedovello M, et al. Reversible dementia from corticosteroid therapy. Clinical Geriatrics. 2012;20(7):38-41.

Drug Brand Names

• Diphenhydramine • Benadryl
• Divalproex • Depakote
• Haloperidol • Haldol
• Lamotrigine • Lamictal
• Lithium • Eskalith, Lithobid
• Lorazepam • Ativan
• Memantine • Namenda
• Methotrexate • Rheumatrex, Trexall
• Mirtazapine • Remeron
• Olanzapine • Zyprexa
• Prednisone • Deltasone, Meticorten, others

Disclosure

The authors report no financial relationship with any company whose products are mentioned in this article or with manufacturers of competing products.

CASE: Behavioral changes

Mr. K, age 45, is brought to the emergency department (ED) by his wife for severe paranoia, combative behavior, confusion, and slowed cognition. Mr. K tells the ED staff that a chemical abrasion he sustained a few weeks earlier has spread to his penis, and insists that his penis is retracting into his body. He has tied a string around his penis to keep it from disappearing into his body. According to Mr. K’s wife, he went to an urgent care clinic 2 weeks ago after he sustained chemical abrasions from exposure to cleaning solution at home. The provider at the urgent care clinic started Mr. K on an unknown dose of oral prednisone.

Mr. K’s wife reports that her husband had a dysphoric episode approximately 6 months ago when his business was struggling but his mood improved without psychiatric care. Mr. K’s medical history includes episodic sarcoidosis of the eyes, skin, and lungs. In the past these symptoms remitted after he received oral prednisone.

ED clinicians consider neurosarcoidosis and substance-induced delirium in the differential diagnosis (Table).¹ A CT scan of the head fails to show lesions suggestive of neurosarcoidosis. Chest radiography does not reveal lesions suggestive of lung sarcoids and Mr. K has no skin lesions.

Table

DSM-IV-TR criteria for substance-induced delirium

Mr. K is admitted to the psychiatric inpatient unit for acute stabilization, where he remains aggressive and combative. He throws chairs at his peers and staff on the unit and is placed in physical restraints. He requires several doses of IM haloperidol, 5 mg, lorazepam, 2 mg, and diphenhydramine, 50 mg, for severe agitation. Mr. K is guarded, perseverative, and selectively mute. He avoids eye contact and has poor grooming. He has slow thought processing and displays concrete thought process. Prednisone is discontinued and olanzapine, titrated to 30 mg/d, and mirtazapine, titrated to 30 mg/d, are started for psychosis and depression.

Mr. K’s mood and behavior eventually return to baseline but slowed cognition persists. He is discharged from our facility.

The authors’ observations

Cortisone was first used to treat rheumatoid arthritis in 1948 and corticosteroids have been linked to multiple neuropsychiatric complications that have been broadly defined as steroid psychosis. This syndrome includes reversible behavioral manifestations such as hypomania, irritability, mood reactivity, anxiety, and insomnia in addition to more severe symptoms such as depression, mania, and psychosis.² Although mild cognitive deficits have been noted in patients taking corticosteroids, most published cases have focused on steroid-induced psychosis.

In 1984, Varney et al³ noted a phenomenon they called “steroid dementia” in 6 patients treated with corticosteroids. On first evaluation, these patients presented with symptoms similar to early Alzheimer’s dementia—impaired memory, attention, and concentration. Three patients initially were diagnosed first with Alzheimer’s dementia until their symptoms spontaneously improved when steroids were reduced or discontinued. Although their presentation resembled Alzheimer’s dementia, patients with steroid dementia had a specific cognitive presentation associated with corticosteroid use. Symptoms included impaired verbal memory and spatial thinking but normal procedural memory. These patients showed intact immediate recall but impaired delayed recall with difficulty tracking conversations and word finding. Overall, patients with steroid dementia showed a predominance of verbal declarative memory deficits out of proportion to other cognitive symptoms. These symptoms and recent corticosteroid exposure differentiated steroid dementia from other forms of dementia.

In a later article, Varney reviewed electroencephalography (EEG) and CT findings associated with steroid dementia, noting bilateral EEG abnormalities and acute cortical atrophy on CT.⁴ Steroid dementia largely was reversible, resolving 3 to 11 months after corticosteroid discontinuation. Additionally, Varney noted that patients who had psychosis and dementia had more severe and longer-lasting dementia.

TREATMENT: Progressive decline

Mr. K is college educated, has been married for 15 years, has 2 children, age 9 and 11, and owns a successful basketball coaching business. He has no history of substance abuse, legal issues, or violence. He reports a good childhood with normal developmental milestones and no history of trauma.

In the 6 months after his initial psychiatric admission, Mr. K sees various outpatient providers, who change his psychotropics multiple times. He also receives 4 courses of prednisone for ocular sarcoidosis. He is admitted twice to other psychiatric facilities. After he has paranoid interactions with colleagues and families of the youth he coaches, his business fails.

After his third psychiatric inpatient hospitalization, Mr. K becomes severely paranoid, believing his wife is having an affair. He becomes physically abusive to his wife, who obtains a restraining order and leaves with their children. Mr. K barely leaves his house and stops grooming. A friend notes that Mr. K’s home has become uninhabitable, and it goes into foreclosure. After Mr. K’s neighbors report combative behavior and paranoia, police bring him in on an involuntary hold for a fourth psychiatric hospitalization (the second in our facility).

During this hospitalization—6 months after the initial ED presentation—the neurology team conducts a repeat medical workup. EEG shows generalized slowing. Head CT and MRI show diffuse cortical atrophy that was not seen in previous imaging. Mr. K has ocular lesions characteristic of ocular sarcoidosis. His mental status examination is similar to his first presentation except that the psychosis and thought disorganization are considerably worse. His cognitive functioning also shows significant decline. Cognitive screening reveals intact remote memory with impaired recent memory. His thinking is concrete and his verbal memory is markedly impaired. His Mini-Mental State Examination score is 27/30, indicating functional capacity that is better than his clinical presentation. Because of difficulty with concentration and verbal processing, Mr. K is unable to complete the Minnesota Multiphasic Personality Inventory despite substantial assistance. On most days he cannot recall recent conversations with his wife, staff, or physicians. He is taking no medications at this time.

Mr. K is restarted on olanzapine, titrated to 30 mg/d, to control his psychosis; this medication was effective during his last stay in our facility. Oral prednisone is discontinued and methotrexate, 10 mg/week, is initiated for ocular sarcoidosis. Based on recommendations from a case series report,⁵ we start Mr. K on lithium, titrated to 600 mg twice a day, for steroid-induced mood symptoms, Mr. K’s psychosis and mood improve dramatically once he reaches a therapeutic lithium level; however, his cognition remains slowed and he is unable to care for his basic needs.

The authors’ observations

Steroid dementia may be the result of effects in the medial temporal lobe, specifically dorsolateral prefrontal cortex, which impairs working memory, and the parahippocampal gyrus.^6,7 The cognitive presentation of steroid dementia Varney et al³ described has been replicated in healthy volunteers who received corticosteroids.³ Patients with Cushing’s syndrome also have been noted to have diminished hippocampal volume and similar cognitive deficits. Cognitive impairment experienced by patients treated with corticosteroids may be caused by neuronal death in the hippocampus and dorsolateral prefrontal cortex. The etiology of cell death is multifactorial and includes glutamate-mediated excitotoxicity, activation of proinflammatory pathways, inhibited utilization of glucose in the hippocampus, telomere shortening, and diminished cell repair by brain-derived neurotrophic factor. The net result is significant, widespread damage that in some cases is irreversible.⁸

Because of the severity of Mr. K’s psychosis and personality change from baseline, his cognitive symptoms were largely overlooked during his first psychiatric hospitalization. The affective flattening, delayed verbal response, and markedly concrete thought process were considered within the spectrum of resolving psychosis. After further hospitalizations and abnormal results on cognitive testing, Mr. K’s cognitive impairment was fully noted. His symptoms match those of previously documented cases of steroid dementia, including verbal deficits out of proportion to other impairment, acute cerebral atrophy on CT after corticosteroid treatment, and gradual improvement of symptoms when corticosteroids were discontinued.

Management recommendations

Educate patients taking steroids about possible side effects of mood changes, psychosis, and cognitive deficits. Close monitoring of patients on corticosteroids is paramount. If psychiatric or cognitive symptoms develop, gradually discontinue the corticosteroid and seek other treatments.

Randomized, placebo-controlled trials of lamotrigine and memantine have shown these medications are cognitively protective for patients taking prednisone.⁹

OUTCOME: Long-term deficits

After a 33-day stay in our adult inpatient psychiatric facility, the county places Mr. K in a permanent conservatorship for severe grave disability. He is discharged to a long-term psychiatric care locked facility for ongoing management. Mr. K spends 20 months in the long-term care facility while his family remains hopeful for his recovery and return home. He is admitted to our facility for acute stabilization of psychotic symptoms after he is released from the locked facility. Although no imaging studies are conducted, he remains significantly forgetful. Additionally, his paranoia persists.

Mr. K is poorly compliant with his psychotropics, which include divalproex, 1,000 mg/d, and olanzapine, 30 mg/d. Although he is discharged home with his family, his functional capacity is less than expected and he requires continuous support. Insisting that Mr. K abstain from steroids after the first psychiatric hospitalization might have prevented this seemingly irreversible dementia.

Related Resources

• Sacks O, Shulman M. Steroid dementia: an overlooked diagnosis? Neurology. 2005;64(4):707-709.
• Cipriani G, Picchi L, Vedovello M, et al. Reversible dementia from corticosteroid therapy. Clinical Geriatrics. 2012;20(7):38-41.

Drug Brand Names

• Diphenhydramine • Benadryl
• Divalproex • Depakote
• Haloperidol • Haldol
• Lamotrigine • Lamictal
• Lithium • Eskalith, Lithobid
• Lorazepam • Ativan
• Memantine • Namenda
• Methotrexate • Rheumatrex, Trexall
• Mirtazapine • Remeron
• Olanzapine • Zyprexa
• Prednisone • Deltasone, Meticorten, others

Disclosure

The authors report no financial relationship with any company whose products are mentioned in this article or with manufacturers of competing products.

A 63-YEAR-OLD MAN came to our clinic complaining of a rash on his penis. He indicated that the rash had been there for almost 2 years and that he’d seen 2 other doctors about it, but they’d been unable to make a diagnosis.

The patient said the rash was mildly painful and tender. He denied pain on urination, discharge, fever, malaise, or arthralgias. He also denied any sexual contact outside of his marriage and indicated that he had not been able to have intimate contact with his wife because of the problem.

The patient was uncircumcised and when the foreskin was retracted, a bright red erythematous nonscaly circumferential plaque was visible on the glans penis, spreading to the foreskin (FIGURE 1).

FIGURE 1
A nonscaly, circumferential plaque on the glans penis

WHAT IS YOUR DIAGNOSIS?
HOW WOULD YOU TREAT THIS PATIENT?

Diagnosis: Zoon’s balanitis

We ordered a biopsy because we suspected that the cause of the rash was either erythroplasia of Queyrat (a premalignant condition also known as Bowen’s disease of the glans penis) or Zoon’s balanitis (plasma cell balanitis or balanitis circumscripta plasmacellularis). The biopsy report confirmed the diagnosis of Zoon’s balanitis and showed no signs of malignancy. The features of Zoon’s balanitis include epidermal atrophy, loss of rete ridges, spongiosis, and subepidermal plasma cell infiltrate without evidence of malignancy (FIGURE 2).

FIGURE 2
Dense plasmacytic infiltration underlying the mucosal epidermis

Condition affects older, uncircumcised men
Zoon’s balanitis is thought to be a benign condition that typically affects uncircumcised middle-aged to elderly men.^1,2 Worldwide prevalence among uncircumcised men is approximately 3%.² The etiology is unknown; it’s thought that this condition may be caused by friction, trauma, heat, lack of hygiene, exogenous or infectious agents, an IgE hypersensitivity, or a chronic infection with Mycobacterium smegmatis.^1,2

Typically, the appearance of the lesion precedes diagnosis by about one to 2 years.¹ The patient usually complains of mild pruritus and tenderness. Undergarments may be bloodstained.

The differential for penile lesions is extensive, and includes psoriasis, nummular eczema, candidiasis, herpes simplex, scabies, lichen sclerosus et atrophicus or lichen planus, syphilis, balanitis, and erythroplasia of Queyrat.

The lesion associated with Zoon’s balanitis is a solitary, glistening, shiny, red-to-orange plaque of the glans penis or prepuce of an uncircumcised male. Pinpoint erythematous spots or “cayenne pepper spots” may also be associated with this condition.

Patients with erythroplasia of Queyrat have either a solitary or multiple nonhealing erythematous plaques on the glans penis. These lesions may also affect the adjacent mucosal epithelium. As is true with Zoon’s balanitis, the typical patient is uncircumcised and middle-aged to elderly.^1,2

Presentations may be similar, but treatment differs

Because the treatments for Zoon’s balanitis and erythroplasia of Queyrat are different, a biopsy is imperative. Erythroplasia of Queyrat is a premalignant condition that is treated with topical fluorouracil or surgical excision.³ Treatment for Zoon’s balanitis consists of a topical corticosteroid with or without topical anticandidal agents and circumcision after the acute inflammation resolves.^1,2 (If a skin biopsy cannot be obtained in the clinic, the foreskin [if affected] can be sent for biopsy after the circumcision.)

If resolution is not seen with topical steroid treatment, other treatments have demonstrated efficacy. These include topical tacrolimus, as well as YAG and carbon dioxide laser treatments.^4-6

Although information is limited on rates of recurrence, circumcision is considered the treatment of choice and is usually curative.¹

Ointment does the trick for our patient

Our patient was treated with a single combined topical ointment consisting of nystatin and triamcinolone cream with zinc oxide. The lesion resolved completely after 10 days. We requested a urology consult so that a circumcision could be performed.

CORRESPONDENCE Matthew R. Noss, DO, MSEd, Fort Belvoir Community Hospital Family Medicine Clinic, 1st Floor, Eagle Pavilion, 9300 Dewitt Loop, Ft. Belvoir, VA 22060; [email protected]

A 63-YEAR-OLD MAN came to our clinic complaining of a rash on his penis. He indicated that the rash had been there for almost 2 years and that he’d seen 2 other doctors about it, but they’d been unable to make a diagnosis.

The patient said the rash was mildly painful and tender. He denied pain on urination, discharge, fever, malaise, or arthralgias. He also denied any sexual contact outside of his marriage and indicated that he had not been able to have intimate contact with his wife because of the problem.

The patient was uncircumcised and when the foreskin was retracted, a bright red erythematous nonscaly circumferential plaque was visible on the glans penis, spreading to the foreskin (FIGURE 1).

FIGURE 1
A nonscaly, circumferential plaque on the glans penis

WHAT IS YOUR DIAGNOSIS?
HOW WOULD YOU TREAT THIS PATIENT?

Diagnosis: Zoon’s balanitis

We ordered a biopsy because we suspected that the cause of the rash was either erythroplasia of Queyrat (a premalignant condition also known as Bowen’s disease of the glans penis) or Zoon’s balanitis (plasma cell balanitis or balanitis circumscripta plasmacellularis). The biopsy report confirmed the diagnosis of Zoon’s balanitis and showed no signs of malignancy. The features of Zoon’s balanitis include epidermal atrophy, loss of rete ridges, spongiosis, and subepidermal plasma cell infiltrate without evidence of malignancy (FIGURE 2).

FIGURE 2
Dense plasmacytic infiltration underlying the mucosal epidermis

Condition affects older, uncircumcised men
Zoon’s balanitis is thought to be a benign condition that typically affects uncircumcised middle-aged to elderly men.^1,2 Worldwide prevalence among uncircumcised men is approximately 3%.² The etiology is unknown; it’s thought that this condition may be caused by friction, trauma, heat, lack of hygiene, exogenous or infectious agents, an IgE hypersensitivity, or a chronic infection with Mycobacterium smegmatis.^1,2

Typically, the appearance of the lesion precedes diagnosis by about one to 2 years.¹ The patient usually complains of mild pruritus and tenderness. Undergarments may be bloodstained.

The differential for penile lesions is extensive, and includes psoriasis, nummular eczema, candidiasis, herpes simplex, scabies, lichen sclerosus et atrophicus or lichen planus, syphilis, balanitis, and erythroplasia of Queyrat.

The lesion associated with Zoon’s balanitis is a solitary, glistening, shiny, red-to-orange plaque of the glans penis or prepuce of an uncircumcised male. Pinpoint erythematous spots or “cayenne pepper spots” may also be associated with this condition.

Patients with erythroplasia of Queyrat have either a solitary or multiple nonhealing erythematous plaques on the glans penis. These lesions may also affect the adjacent mucosal epithelium. As is true with Zoon’s balanitis, the typical patient is uncircumcised and middle-aged to elderly.^1,2

Presentations may be similar, but treatment differs

Because the treatments for Zoon’s balanitis and erythroplasia of Queyrat are different, a biopsy is imperative. Erythroplasia of Queyrat is a premalignant condition that is treated with topical fluorouracil or surgical excision.³ Treatment for Zoon’s balanitis consists of a topical corticosteroid with or without topical anticandidal agents and circumcision after the acute inflammation resolves.^1,2 (If a skin biopsy cannot be obtained in the clinic, the foreskin [if affected] can be sent for biopsy after the circumcision.)

If resolution is not seen with topical steroid treatment, other treatments have demonstrated efficacy. These include topical tacrolimus, as well as YAG and carbon dioxide laser treatments.^4-6

Although information is limited on rates of recurrence, circumcision is considered the treatment of choice and is usually curative.¹

Ointment does the trick for our patient

Our patient was treated with a single combined topical ointment consisting of nystatin and triamcinolone cream with zinc oxide. The lesion resolved completely after 10 days. We requested a urology consult so that a circumcision could be performed.

CORRESPONDENCE Matthew R. Noss, DO, MSEd, Fort Belvoir Community Hospital Family Medicine Clinic, 1st Floor, Eagle Pavilion, 9300 Dewitt Loop, Ft. Belvoir, VA 22060; [email protected]

A 63-YEAR-OLD MAN came to our clinic complaining of a rash on his penis. He indicated that the rash had been there for almost 2 years and that he’d seen 2 other doctors about it, but they’d been unable to make a diagnosis.

The patient said the rash was mildly painful and tender. He denied pain on urination, discharge, fever, malaise, or arthralgias. He also denied any sexual contact outside of his marriage and indicated that he had not been able to have intimate contact with his wife because of the problem.

The patient was uncircumcised and when the foreskin was retracted, a bright red erythematous nonscaly circumferential plaque was visible on the glans penis, spreading to the foreskin (FIGURE 1).

FIGURE 1
A nonscaly, circumferential plaque on the glans penis

WHAT IS YOUR DIAGNOSIS?
HOW WOULD YOU TREAT THIS PATIENT?

Diagnosis: Zoon’s balanitis

We ordered a biopsy because we suspected that the cause of the rash was either erythroplasia of Queyrat (a premalignant condition also known as Bowen’s disease of the glans penis) or Zoon’s balanitis (plasma cell balanitis or balanitis circumscripta plasmacellularis). The biopsy report confirmed the diagnosis of Zoon’s balanitis and showed no signs of malignancy. The features of Zoon’s balanitis include epidermal atrophy, loss of rete ridges, spongiosis, and subepidermal plasma cell infiltrate without evidence of malignancy (FIGURE 2).

FIGURE 2
Dense plasmacytic infiltration underlying the mucosal epidermis

Condition affects older, uncircumcised men
Zoon’s balanitis is thought to be a benign condition that typically affects uncircumcised middle-aged to elderly men.^1,2 Worldwide prevalence among uncircumcised men is approximately 3%.² The etiology is unknown; it’s thought that this condition may be caused by friction, trauma, heat, lack of hygiene, exogenous or infectious agents, an IgE hypersensitivity, or a chronic infection with Mycobacterium smegmatis.^1,2

Typically, the appearance of the lesion precedes diagnosis by about one to 2 years.¹ The patient usually complains of mild pruritus and tenderness. Undergarments may be bloodstained.

The differential for penile lesions is extensive, and includes psoriasis, nummular eczema, candidiasis, herpes simplex, scabies, lichen sclerosus et atrophicus or lichen planus, syphilis, balanitis, and erythroplasia of Queyrat.

The lesion associated with Zoon’s balanitis is a solitary, glistening, shiny, red-to-orange plaque of the glans penis or prepuce of an uncircumcised male. Pinpoint erythematous spots or “cayenne pepper spots” may also be associated with this condition.

Patients with erythroplasia of Queyrat have either a solitary or multiple nonhealing erythematous plaques on the glans penis. These lesions may also affect the adjacent mucosal epithelium. As is true with Zoon’s balanitis, the typical patient is uncircumcised and middle-aged to elderly.^1,2

Presentations may be similar, but treatment differs

Because the treatments for Zoon’s balanitis and erythroplasia of Queyrat are different, a biopsy is imperative. Erythroplasia of Queyrat is a premalignant condition that is treated with topical fluorouracil or surgical excision.³ Treatment for Zoon’s balanitis consists of a topical corticosteroid with or without topical anticandidal agents and circumcision after the acute inflammation resolves.^1,2 (If a skin biopsy cannot be obtained in the clinic, the foreskin [if affected] can be sent for biopsy after the circumcision.)

If resolution is not seen with topical steroid treatment, other treatments have demonstrated efficacy. These include topical tacrolimus, as well as YAG and carbon dioxide laser treatments.^4-6

Although information is limited on rates of recurrence, circumcision is considered the treatment of choice and is usually curative.¹

Ointment does the trick for our patient

Our patient was treated with a single combined topical ointment consisting of nystatin and triamcinolone cream with zinc oxide. The lesion resolved completely after 10 days. We requested a urology consult so that a circumcision could be performed.

CORRESPONDENCE Matthew R. Noss, DO, MSEd, Fort Belvoir Community Hospital Family Medicine Clinic, 1st Floor, Eagle Pavilion, 9300 Dewitt Loop, Ft. Belvoir, VA 22060; [email protected]

Death follows a normal EKG

MID-CHEST DISCOMFORT, A COUGH, AND SWEATING brought a 59-year-old man to his primary care physician. The patient had normal vital signs and reported that belching relieved the chest discomfort. He had a history of severe coronary artery disease and had undergone angioplasty and stenting several years earlier.

The primary care physician performed an electrocardiogram (EKG), which was normal and unchanged from one done the year before. The doctor suspected bronchitis, but prescribed omeprazole because the patient had previously been diagnosed with gastroesophageal reflux disease. He ordered a chemical stress test to be performed within a month and a chest radiograph to be done if the patient’s symptoms didn’t improve.

Two hours after returning home, the patient called an ambulance. He told paramedics that he’d been having chest pain for an hour. While they were putting the patient into the ambulance, he went into cardiac arrest. Four defibrillation attempts en route to the hospital and additional resuscitation attempts in the ED failed; he was pronounced dead 3½ hours after leaving his physician’s office.

No autopsy was performed. The patient’s widow found the omeprazole bottle, with one pill missing, and fast-food hamburger wrappers on the kitchen table.

PLAINTIFF’S CLAIM The primary care physician should have sent the patient to the ED to determine whether the chest pain had a cardiac cause; the patient was suffering from acute cardiac syndrome when the doctor saw him.

THE DEFENSE The patient’s normal EKG and vital signs and the fact that belching relieved his chest symptoms indicated that the complaints did not arise from cardiac causes or require emergency assessment. The patient didn’t report chest pain at the office visit; the later cardiac arrest probably resulted from a sudden plaque rupture unrelated to the earlier chest discomfort.

VERDICT $1.5 million Illinois verdict.

COMMENT I hope most doctors won’t have to learn this lesson from their own experience. A normal EKG does not rule out acute ischemia in a high-risk patient with chest pain and sweating. Admit such patients immediately to a cardiac observation unit.

Kidney failure after multiple meds

A MAN WAS TAKING MULTIPLE MEDICATIONS: 3 blood pressure drugs prescribed by his primary care physician, an NSAID prescribed by another doctor, and sizable doses of BC Powder, an over-the-counter analgesic containing aspirin, salicylamide, and caffeine. After 4 years on this medication regimen, the patient’s kidneys failed.

PLAINTIFF’S CLAIM The primary care physician failed to properly monitor kidney function with blood and urine tests while his patient was taking the medications. Proper testing would have resulted in a diagnosis of kidney disease before the patient’s kidneys failed completely. In addition, the primary care physician failed to explain the risks and side effects of the medications to the patient.

THE DEFENSE The patient refused kidney function testing and did not follow medical advice. He consumed excessive amounts of alcohol against medical advice, did not tell the primary care physician about other drugs he was taking, and had allowed his supply of blood pressure medication to run out.

VERDICT $2 million gross verdict in Georgia, with a finding of 47% comparative negligence.

COMMENT This case offers several lessons: First, each BC Powder packet contains the equivalent of 2 aspirin. Second, chronic, high-dose NSAIDs can cause renal failure, especially in patients whose renal function is compromised by hypertension. Third, all patients with hypertension should undergo periodic monitoring of renal function.

Death follows a normal EKG

MID-CHEST DISCOMFORT, A COUGH, AND SWEATING brought a 59-year-old man to his primary care physician. The patient had normal vital signs and reported that belching relieved the chest discomfort. He had a history of severe coronary artery disease and had undergone angioplasty and stenting several years earlier.

The primary care physician performed an electrocardiogram (EKG), which was normal and unchanged from one done the year before. The doctor suspected bronchitis, but prescribed omeprazole because the patient had previously been diagnosed with gastroesophageal reflux disease. He ordered a chemical stress test to be performed within a month and a chest radiograph to be done if the patient’s symptoms didn’t improve.

Two hours after returning home, the patient called an ambulance. He told paramedics that he’d been having chest pain for an hour. While they were putting the patient into the ambulance, he went into cardiac arrest. Four defibrillation attempts en route to the hospital and additional resuscitation attempts in the ED failed; he was pronounced dead 3½ hours after leaving his physician’s office.

No autopsy was performed. The patient’s widow found the omeprazole bottle, with one pill missing, and fast-food hamburger wrappers on the kitchen table.

PLAINTIFF’S CLAIM The primary care physician should have sent the patient to the ED to determine whether the chest pain had a cardiac cause; the patient was suffering from acute cardiac syndrome when the doctor saw him.

THE DEFENSE The patient’s normal EKG and vital signs and the fact that belching relieved his chest symptoms indicated that the complaints did not arise from cardiac causes or require emergency assessment. The patient didn’t report chest pain at the office visit; the later cardiac arrest probably resulted from a sudden plaque rupture unrelated to the earlier chest discomfort.

VERDICT $1.5 million Illinois verdict.

COMMENT I hope most doctors won’t have to learn this lesson from their own experience. A normal EKG does not rule out acute ischemia in a high-risk patient with chest pain and sweating. Admit such patients immediately to a cardiac observation unit.

Kidney failure after multiple meds

A MAN WAS TAKING MULTIPLE MEDICATIONS: 3 blood pressure drugs prescribed by his primary care physician, an NSAID prescribed by another doctor, and sizable doses of BC Powder, an over-the-counter analgesic containing aspirin, salicylamide, and caffeine. After 4 years on this medication regimen, the patient’s kidneys failed.

PLAINTIFF’S CLAIM The primary care physician failed to properly monitor kidney function with blood and urine tests while his patient was taking the medications. Proper testing would have resulted in a diagnosis of kidney disease before the patient’s kidneys failed completely. In addition, the primary care physician failed to explain the risks and side effects of the medications to the patient.

THE DEFENSE The patient refused kidney function testing and did not follow medical advice. He consumed excessive amounts of alcohol against medical advice, did not tell the primary care physician about other drugs he was taking, and had allowed his supply of blood pressure medication to run out.

VERDICT $2 million gross verdict in Georgia, with a finding of 47% comparative negligence.

COMMENT This case offers several lessons: First, each BC Powder packet contains the equivalent of 2 aspirin. Second, chronic, high-dose NSAIDs can cause renal failure, especially in patients whose renal function is compromised by hypertension. Third, all patients with hypertension should undergo periodic monitoring of renal function.

Death follows a normal EKG

MID-CHEST DISCOMFORT, A COUGH, AND SWEATING brought a 59-year-old man to his primary care physician. The patient had normal vital signs and reported that belching relieved the chest discomfort. He had a history of severe coronary artery disease and had undergone angioplasty and stenting several years earlier.

The primary care physician performed an electrocardiogram (EKG), which was normal and unchanged from one done the year before. The doctor suspected bronchitis, but prescribed omeprazole because the patient had previously been diagnosed with gastroesophageal reflux disease. He ordered a chemical stress test to be performed within a month and a chest radiograph to be done if the patient’s symptoms didn’t improve.

Two hours after returning home, the patient called an ambulance. He told paramedics that he’d been having chest pain for an hour. While they were putting the patient into the ambulance, he went into cardiac arrest. Four defibrillation attempts en route to the hospital and additional resuscitation attempts in the ED failed; he was pronounced dead 3½ hours after leaving his physician’s office.

No autopsy was performed. The patient’s widow found the omeprazole bottle, with one pill missing, and fast-food hamburger wrappers on the kitchen table.

PLAINTIFF’S CLAIM The primary care physician should have sent the patient to the ED to determine whether the chest pain had a cardiac cause; the patient was suffering from acute cardiac syndrome when the doctor saw him.

THE DEFENSE The patient’s normal EKG and vital signs and the fact that belching relieved his chest symptoms indicated that the complaints did not arise from cardiac causes or require emergency assessment. The patient didn’t report chest pain at the office visit; the later cardiac arrest probably resulted from a sudden plaque rupture unrelated to the earlier chest discomfort.

VERDICT $1.5 million Illinois verdict.

COMMENT I hope most doctors won’t have to learn this lesson from their own experience. A normal EKG does not rule out acute ischemia in a high-risk patient with chest pain and sweating. Admit such patients immediately to a cardiac observation unit.

Kidney failure after multiple meds

A MAN WAS TAKING MULTIPLE MEDICATIONS: 3 blood pressure drugs prescribed by his primary care physician, an NSAID prescribed by another doctor, and sizable doses of BC Powder, an over-the-counter analgesic containing aspirin, salicylamide, and caffeine. After 4 years on this medication regimen, the patient’s kidneys failed.

PLAINTIFF’S CLAIM The primary care physician failed to properly monitor kidney function with blood and urine tests while his patient was taking the medications. Proper testing would have resulted in a diagnosis of kidney disease before the patient’s kidneys failed completely. In addition, the primary care physician failed to explain the risks and side effects of the medications to the patient.

THE DEFENSE The patient refused kidney function testing and did not follow medical advice. He consumed excessive amounts of alcohol against medical advice, did not tell the primary care physician about other drugs he was taking, and had allowed his supply of blood pressure medication to run out.

VERDICT $2 million gross verdict in Georgia, with a finding of 47% comparative negligence.

COMMENT This case offers several lessons: First, each BC Powder packet contains the equivalent of 2 aspirin. Second, chronic, high-dose NSAIDs can cause renal failure, especially in patients whose renal function is compromised by hypertension. Third, all patients with hypertension should undergo periodic monitoring of renal function.

The Centers for Disease Control and Prevention (CDC) recently released new recommendations for screening for hepatitis C virus (HCV) infection that include a one-time screening for everyone in the United States born between 1945 and 1965, regardless of risk.¹ These new recommendations are an enhancement of, but not a replacement for, the recommendations for HCV screening made in 1998, which called for screening those at high risk.²

HCV causes considerable morbidity and mortality in this country. Approximately 17,000 new infections occurred in 2010.¹ Between 2.7 and 3.9 million Americans (1%-1.5% of the population) are living with chronic HCV infection, and many do not know they are infected.¹ This lack of awareness appears to be due to a failure of both health care providers to offer testing to those at known risk and patients to either acknowledge or recall past high-risk behaviors.

Those at highest risk for HCV infection are current or past users of illegal injected drugs and recipients of a blood transfusion before 1992 (when HCV screening of the blood supply was instituted). Other risk factors are listed in TABLE 1.¹ Many of those with HCV infection do not report injection drug use or having received a transfusion prior to 1992, and they are not detected by current risk-based testing.

TABLE 1
Risk factors for HCV infection¹

Approximately three-fourths of those who acquire HCV are unable to clear the virus and become chronically infected.¹ Twenty percent of these individuals will develop cirrhosis and 5% will die from an HCV-related liver disease, such as decompensated cirrhosis or hepatocellular carcinoma (HCC).³

New treatments. In 2011, 2 protease inhibitor drugs, telaprevir and boceprevir, were approved for the treatment of HCV geno-type 1. These are the first generation of a class of drugs called direct-acting antiviral agents (DAAs). When a DAA is added to the standard therapy of ribavirin and pegylated interferon, the rate of viral clearance increases (from 44% to 75% for telaprevir and from 38% to 63% for boceprevir).¹ However, the adverse reactions caused by these new drugs can lead to a 34% rise in the rate at which patients stop treatment.¹ Twenty potential new HCV antivirals are in clinical trials, and it is expected that treatment recommendations will change rapidly as some of these are approved.

Does treatment improve long-term outcomes?

Clinical guidelines recommend antiviral treatment for anyone with HCV infection and biopsy evidence of bridging fibrosis, septal fibrosis, or cirrhosis.⁴

A look at Tx and all-cause mortality. Studies looking at patient-oriented outcomes such as all-cause mortality and incidence of HCC have been conducted with pegylated interferon and ribavirin, without the newer DAAs. The most commonly cited study assessed all-cause mortality in a large sample of veterans with multiple comorbidities.

Those who achieved a sustained virological response after treatment exhibited a reduction in all-cause mortality >50% compared with nonresponders. This endpoint included substantially lower rates of liver-related deaths and cirrhosis complicated by ascites, variceal bleeding, or encephalopathy.⁵ However, in such a nonrandom clinical trial, an improved outcome for responders could be due to their relatively good health, with fewer comorbid conditions, and other undetected biases. While this study attempted to control for such biases, it didn’t provide evidence that treating infection detected by screening a low-risk population would improve intermediate or long-term outcomes.

Observational studies look at carcinoma incidence. Twelve observational studies have addressed treatment effects on HCC incidence. They showed a 75% reduction in HCC rates in those who achieved viral clearance compared with those who did not.¹ Again, these studies did not compare treated and untreated patients in a controlled clinical trial; they looked only at treated individuals and compared the outcomes of responders and nonresponders.

HCV transmission research is lacking. The CDC found no studies in its evidence review that addressed the issue of HCV transmission. Nevertheless, the new recommendations state that HCV transmission was a critical factor in determining the strength of the recommendation for age cohort screening. It is expected that those who have a sustained viral response will be less likely to transmit the virus to others.

Why the 1945-1965 birth cohort?
The prevalence of HCV infection in those born between 1945 and 1965 is 3.25%, and three-fourths of all those with HCV infection in the United States are in this cohort. The FIGURE depicts the large difference in prevalence between this age group and others. Within 3 cohorts defined by date of birth (1945-1965, 1950-1970, and 1945-1970), the prevalence of HCV infection is twice as high in men than in women, and in black non-Hispanics than in white non-Hispanics and Mexican Americans. However, extending the birth cohort to those born through 1970 yields only a marginal difference in prevalence figures. The CDC justifies restricting the new universal screening recommendation to the 1945-1965 age group mainly on the results of focus groups in which the public identified this cohort as “baby boomers” who would likely adopt the recommendation.

FIGURE
Prevalence of hepatitis C virus antibody by year of birth¹

*National Health and Nutrition Examination Survey, United States, 1988–1994 and 1999–2002.

Two-step screening process
Screen individuals using a test for antibodies to HCV (anti-HCV). If the anti-HCV test result is positive, order a test for HCV nucleic acid that gives either a quantitative measure of viral load or a qualitative assessment of presence or absence of virus. If the confirmatory nucleic acid test result is negative, the individual does not have chronic HCV infection and is among the approximately 25% who clear the virus on their own. They do not need further testing or treatment.

What to tell infected patients

If the confirmatory test result is positive, presume the patient has HCV infection and offer the advice contained in TABLE 2.¹ Patients should undergo further assessment for possible chronic liver disease and, with the counsel of their physician, decide whether to initiate treatment. They should also take measures to protect the liver from further damage, such as reducing alcohol consumption, avoiding medication and herbal products that can damage the liver, maintaining an optimal weight, and receiving vaccines against hepatitis A and B, if still susceptible to these viruses. Finally, encourage patients to take steps to avoid transmission of HCV to others.

TABLE 2
Advice for your patients with HCV infection¹

The decision on whether to begin treatment immediately is complicated by the large number of new antivirals in development, which will be available in the near future and may be more effective with fewer adverse effects.

Lingering controversies
Given the lack of evidence of improved outcomes with HCV screening in the general population, it will be interesting to see how widely accepted the new CDC recommendations will be. The US Preventive Services Task Force is in the process of revising its HCV screening recommendations. Given the Task Force’s evidence-based methodology and the lack of evidence on the benefits and harms of screening those with no reported risks, there may be some differences with the new CDC recommendations.

If the CDC’s assumption proves correct—ie, that the benefits of treating high-risk populations will also occur with treating detected infection in the general population—and if the age cohort screening recommendation is fully implemented, 47,000 cases of HCC and 15,000 liver transplants will be prevented.¹

The Centers for Disease Control and Prevention (CDC) recently released new recommendations for screening for hepatitis C virus (HCV) infection that include a one-time screening for everyone in the United States born between 1945 and 1965, regardless of risk.¹ These new recommendations are an enhancement of, but not a replacement for, the recommendations for HCV screening made in 1998, which called for screening those at high risk.²

HCV causes considerable morbidity and mortality in this country. Approximately 17,000 new infections occurred in 2010.¹ Between 2.7 and 3.9 million Americans (1%-1.5% of the population) are living with chronic HCV infection, and many do not know they are infected.¹ This lack of awareness appears to be due to a failure of both health care providers to offer testing to those at known risk and patients to either acknowledge or recall past high-risk behaviors.

Those at highest risk for HCV infection are current or past users of illegal injected drugs and recipients of a blood transfusion before 1992 (when HCV screening of the blood supply was instituted). Other risk factors are listed in TABLE 1.¹ Many of those with HCV infection do not report injection drug use or having received a transfusion prior to 1992, and they are not detected by current risk-based testing.

TABLE 1
Risk factors for HCV infection¹

Approximately three-fourths of those who acquire HCV are unable to clear the virus and become chronically infected.¹ Twenty percent of these individuals will develop cirrhosis and 5% will die from an HCV-related liver disease, such as decompensated cirrhosis or hepatocellular carcinoma (HCC).³

New treatments. In 2011, 2 protease inhibitor drugs, telaprevir and boceprevir, were approved for the treatment of HCV geno-type 1. These are the first generation of a class of drugs called direct-acting antiviral agents (DAAs). When a DAA is added to the standard therapy of ribavirin and pegylated interferon, the rate of viral clearance increases (from 44% to 75% for telaprevir and from 38% to 63% for boceprevir).¹ However, the adverse reactions caused by these new drugs can lead to a 34% rise in the rate at which patients stop treatment.¹ Twenty potential new HCV antivirals are in clinical trials, and it is expected that treatment recommendations will change rapidly as some of these are approved.

Does treatment improve long-term outcomes?

Clinical guidelines recommend antiviral treatment for anyone with HCV infection and biopsy evidence of bridging fibrosis, septal fibrosis, or cirrhosis.⁴

A look at Tx and all-cause mortality. Studies looking at patient-oriented outcomes such as all-cause mortality and incidence of HCC have been conducted with pegylated interferon and ribavirin, without the newer DAAs. The most commonly cited study assessed all-cause mortality in a large sample of veterans with multiple comorbidities.

Those who achieved a sustained virological response after treatment exhibited a reduction in all-cause mortality >50% compared with nonresponders. This endpoint included substantially lower rates of liver-related deaths and cirrhosis complicated by ascites, variceal bleeding, or encephalopathy.⁵ However, in such a nonrandom clinical trial, an improved outcome for responders could be due to their relatively good health, with fewer comorbid conditions, and other undetected biases. While this study attempted to control for such biases, it didn’t provide evidence that treating infection detected by screening a low-risk population would improve intermediate or long-term outcomes.

Observational studies look at carcinoma incidence. Twelve observational studies have addressed treatment effects on HCC incidence. They showed a 75% reduction in HCC rates in those who achieved viral clearance compared with those who did not.¹ Again, these studies did not compare treated and untreated patients in a controlled clinical trial; they looked only at treated individuals and compared the outcomes of responders and nonresponders.

HCV transmission research is lacking. The CDC found no studies in its evidence review that addressed the issue of HCV transmission. Nevertheless, the new recommendations state that HCV transmission was a critical factor in determining the strength of the recommendation for age cohort screening. It is expected that those who have a sustained viral response will be less likely to transmit the virus to others.

Why the 1945-1965 birth cohort?
The prevalence of HCV infection in those born between 1945 and 1965 is 3.25%, and three-fourths of all those with HCV infection in the United States are in this cohort. The FIGURE depicts the large difference in prevalence between this age group and others. Within 3 cohorts defined by date of birth (1945-1965, 1950-1970, and 1945-1970), the prevalence of HCV infection is twice as high in men than in women, and in black non-Hispanics than in white non-Hispanics and Mexican Americans. However, extending the birth cohort to those born through 1970 yields only a marginal difference in prevalence figures. The CDC justifies restricting the new universal screening recommendation to the 1945-1965 age group mainly on the results of focus groups in which the public identified this cohort as “baby boomers” who would likely adopt the recommendation.

FIGURE
Prevalence of hepatitis C virus antibody by year of birth¹

*National Health and Nutrition Examination Survey, United States, 1988–1994 and 1999–2002.

Two-step screening process
Screen individuals using a test for antibodies to HCV (anti-HCV). If the anti-HCV test result is positive, order a test for HCV nucleic acid that gives either a quantitative measure of viral load or a qualitative assessment of presence or absence of virus. If the confirmatory nucleic acid test result is negative, the individual does not have chronic HCV infection and is among the approximately 25% who clear the virus on their own. They do not need further testing or treatment.

What to tell infected patients

If the confirmatory test result is positive, presume the patient has HCV infection and offer the advice contained in TABLE 2.¹ Patients should undergo further assessment for possible chronic liver disease and, with the counsel of their physician, decide whether to initiate treatment. They should also take measures to protect the liver from further damage, such as reducing alcohol consumption, avoiding medication and herbal products that can damage the liver, maintaining an optimal weight, and receiving vaccines against hepatitis A and B, if still susceptible to these viruses. Finally, encourage patients to take steps to avoid transmission of HCV to others.

TABLE 2
Advice for your patients with HCV infection¹

The decision on whether to begin treatment immediately is complicated by the large number of new antivirals in development, which will be available in the near future and may be more effective with fewer adverse effects.

Lingering controversies
Given the lack of evidence of improved outcomes with HCV screening in the general population, it will be interesting to see how widely accepted the new CDC recommendations will be. The US Preventive Services Task Force is in the process of revising its HCV screening recommendations. Given the Task Force’s evidence-based methodology and the lack of evidence on the benefits and harms of screening those with no reported risks, there may be some differences with the new CDC recommendations.

If the CDC’s assumption proves correct—ie, that the benefits of treating high-risk populations will also occur with treating detected infection in the general population—and if the age cohort screening recommendation is fully implemented, 47,000 cases of HCC and 15,000 liver transplants will be prevented.¹

The Centers for Disease Control and Prevention (CDC) recently released new recommendations for screening for hepatitis C virus (HCV) infection that include a one-time screening for everyone in the United States born between 1945 and 1965, regardless of risk.¹ These new recommendations are an enhancement of, but not a replacement for, the recommendations for HCV screening made in 1998, which called for screening those at high risk.²

HCV causes considerable morbidity and mortality in this country. Approximately 17,000 new infections occurred in 2010.¹ Between 2.7 and 3.9 million Americans (1%-1.5% of the population) are living with chronic HCV infection, and many do not know they are infected.¹ This lack of awareness appears to be due to a failure of both health care providers to offer testing to those at known risk and patients to either acknowledge or recall past high-risk behaviors.

Those at highest risk for HCV infection are current or past users of illegal injected drugs and recipients of a blood transfusion before 1992 (when HCV screening of the blood supply was instituted). Other risk factors are listed in TABLE 1.¹ Many of those with HCV infection do not report injection drug use or having received a transfusion prior to 1992, and they are not detected by current risk-based testing.

TABLE 1
Risk factors for HCV infection¹

Approximately three-fourths of those who acquire HCV are unable to clear the virus and become chronically infected.¹ Twenty percent of these individuals will develop cirrhosis and 5% will die from an HCV-related liver disease, such as decompensated cirrhosis or hepatocellular carcinoma (HCC).³

New treatments. In 2011, 2 protease inhibitor drugs, telaprevir and boceprevir, were approved for the treatment of HCV geno-type 1. These are the first generation of a class of drugs called direct-acting antiviral agents (DAAs). When a DAA is added to the standard therapy of ribavirin and pegylated interferon, the rate of viral clearance increases (from 44% to 75% for telaprevir and from 38% to 63% for boceprevir).¹ However, the adverse reactions caused by these new drugs can lead to a 34% rise in the rate at which patients stop treatment.¹ Twenty potential new HCV antivirals are in clinical trials, and it is expected that treatment recommendations will change rapidly as some of these are approved.

Does treatment improve long-term outcomes?

Clinical guidelines recommend antiviral treatment for anyone with HCV infection and biopsy evidence of bridging fibrosis, septal fibrosis, or cirrhosis.⁴

A look at Tx and all-cause mortality. Studies looking at patient-oriented outcomes such as all-cause mortality and incidence of HCC have been conducted with pegylated interferon and ribavirin, without the newer DAAs. The most commonly cited study assessed all-cause mortality in a large sample of veterans with multiple comorbidities.

Those who achieved a sustained virological response after treatment exhibited a reduction in all-cause mortality >50% compared with nonresponders. This endpoint included substantially lower rates of liver-related deaths and cirrhosis complicated by ascites, variceal bleeding, or encephalopathy.⁵ However, in such a nonrandom clinical trial, an improved outcome for responders could be due to their relatively good health, with fewer comorbid conditions, and other undetected biases. While this study attempted to control for such biases, it didn’t provide evidence that treating infection detected by screening a low-risk population would improve intermediate or long-term outcomes.

Observational studies look at carcinoma incidence. Twelve observational studies have addressed treatment effects on HCC incidence. They showed a 75% reduction in HCC rates in those who achieved viral clearance compared with those who did not.¹ Again, these studies did not compare treated and untreated patients in a controlled clinical trial; they looked only at treated individuals and compared the outcomes of responders and nonresponders.

HCV transmission research is lacking. The CDC found no studies in its evidence review that addressed the issue of HCV transmission. Nevertheless, the new recommendations state that HCV transmission was a critical factor in determining the strength of the recommendation for age cohort screening. It is expected that those who have a sustained viral response will be less likely to transmit the virus to others.

Why the 1945-1965 birth cohort?
The prevalence of HCV infection in those born between 1945 and 1965 is 3.25%, and three-fourths of all those with HCV infection in the United States are in this cohort. The FIGURE depicts the large difference in prevalence between this age group and others. Within 3 cohorts defined by date of birth (1945-1965, 1950-1970, and 1945-1970), the prevalence of HCV infection is twice as high in men than in women, and in black non-Hispanics than in white non-Hispanics and Mexican Americans. However, extending the birth cohort to those born through 1970 yields only a marginal difference in prevalence figures. The CDC justifies restricting the new universal screening recommendation to the 1945-1965 age group mainly on the results of focus groups in which the public identified this cohort as “baby boomers” who would likely adopt the recommendation.

FIGURE
Prevalence of hepatitis C virus antibody by year of birth¹

*National Health and Nutrition Examination Survey, United States, 1988–1994 and 1999–2002.

Two-step screening process
Screen individuals using a test for antibodies to HCV (anti-HCV). If the anti-HCV test result is positive, order a test for HCV nucleic acid that gives either a quantitative measure of viral load or a qualitative assessment of presence or absence of virus. If the confirmatory nucleic acid test result is negative, the individual does not have chronic HCV infection and is among the approximately 25% who clear the virus on their own. They do not need further testing or treatment.

What to tell infected patients

If the confirmatory test result is positive, presume the patient has HCV infection and offer the advice contained in TABLE 2.¹ Patients should undergo further assessment for possible chronic liver disease and, with the counsel of their physician, decide whether to initiate treatment. They should also take measures to protect the liver from further damage, such as reducing alcohol consumption, avoiding medication and herbal products that can damage the liver, maintaining an optimal weight, and receiving vaccines against hepatitis A and B, if still susceptible to these viruses. Finally, encourage patients to take steps to avoid transmission of HCV to others.

TABLE 2
Advice for your patients with HCV infection¹

The decision on whether to begin treatment immediately is complicated by the large number of new antivirals in development, which will be available in the near future and may be more effective with fewer adverse effects.

Lingering controversies
Given the lack of evidence of improved outcomes with HCV screening in the general population, it will be interesting to see how widely accepted the new CDC recommendations will be. The US Preventive Services Task Force is in the process of revising its HCV screening recommendations. Given the Task Force’s evidence-based methodology and the lack of evidence on the benefits and harms of screening those with no reported risks, there may be some differences with the new CDC recommendations.

If the CDC’s assumption proves correct—ie, that the benefits of treating high-risk populations will also occur with treating detected infection in the general population—and if the age cohort screening recommendation is fully implemented, 47,000 cases of HCC and 15,000 liver transplants will be prevented.¹

Hip pain is a common complaint, and commonly misunderstood. Although the pain can be associated with a broad spectrum of conditions, the presentation is often vague and nonspecific.

Thus, hip pain and injury are frequently attributed, often incorrectly, to a “hip pointer”—a contusion of soft tissues against the iliac crest. It’s not unusual for patients who receive this diagnosis to be treated conservatively for prolonged periods, leading some previously active individuals to abandon their favorite sport or self-impose limits on the activities they engage in.¹

But it doesn’t have to be this way.

Minimally invasive hip arthroscopy and advances in imaging, instrumentation, and devices have made it easier to identify and address underlying pathology associated with hip pain, helping patients return to their previous level of activity more rapidly.^2,3 And, while many conditions associated with hip pain can be treated conservatively, family physicians—whom patients often go to first—should not hesitate to provide a referral when more aggressive treatment or diagnostic confirmation is needed.

We created this guide with family physicians in mind. Our focus here is primarily on anterior hip pain—the most common presentation—in active, or athletic, patients.

When did the pain begin? Where does it hurt?

Before performing a physical examination, find out as much as possible about the onset of pain and when and under what circumstances it occurs. (A review of hip anatomy is provided here.) Did it begin suddenly, after an acute injury or a particular physical maneuver? Or is the pain insidious, as was the case with one of our patients?

Hip anatomy: A brief review

Osseous morphology of the hip includes the anterior superior iliac spine, the origin of the sartorius muscle and the ilioinguinal ligament. The anterior inferior iliac spine attaches to the rectus femoris, a major hip flexor and knee extender. The adductors of the hip originate in the anterior pelvic region.

The inguinal canal contains the ilioinguinal nerve, which is responsible for radiation of pain to the anterior hip. The hip joint itself is a spheroid comprising the femoral head and acetabulum, with most of the articular hip innervated by the femoral or obturator nerves.

Most intra-articular conditions radiate to the anterior groin or hip, although there are cases in which the pain is referred to either the lateral aspect of the hip or the buttocks. The iliopsoas muscle is the major hip flexor, and crosses under the ilioinguinal ligament to insert on the lesser tuberosity after crossing over the anterior capsule of the hip. A large bursa surrounds it, helping the tendon glide smoothly over the hip.

CASE Mack Q, a 27-year-old man with an 8-month history of right hip pain, sought care at our medical center for an achy pain in his right groin; he also described an occasional “clicking and popping sensation” in his groin but denied any trauma. The pain worsened with prolonged sitting and certain activities, such as squatting, twisting, and putting on shoes and socks. Our patient had stopped playing soccer because it hurt too much. He had tried physical therapy, oral anti-inflammatories, and a corticosteroid injection, with little relief.

Start with a gait assessment
The physical examination should begin with a gait assessment. Consider the patient’s ability to bear weight and his or her foot angle.

An individual with a stress fracture will have difficulty bearing weight on the affected side, resulting in a limp, or antalgic gait. A patient with femoral acetabular impingement (FAI) will often exhibit greater external rotation of the foot on the affected side compared with the other foot. And a patient with weakened abductor muscles, typically because of severe osteoarthritis, will exhibit the Trendelenburg sign—a pelvic tilt when the weight is shifted to the affected extremity.

Although most individuals with hip pain will not have an obvious gait abnormality, any patient who walks with a limp or needs crutches requires an immediate referral to an orthopedic surgeon.

Include these elements in the physical exam
Examine the hip with the patient sitting on the side of the exam table. Assess range of motion (ROM), comparing the range of flexion, extension, and internal/external rotation on the affected and unaffected sides. Include the following maneuvers:

Impingement testing. In patients with FAI and osteoarthritis, impingement testing—encompassing Flexion, ADDuction, and Internal Rotation (FADDIR)—will elicit pain. The maneuver can be tested starting at 45° of hip flexion, increasing to approximately 120°. Pain with <45° of hip flexion indicates that the impingement is severe.

Such testing can also reveal labral tears, which may be caused by FAI or other structural abnormalities. In a patient with anterior labral tears, FADDIR will produce groin pain; posterior labral tears will produce pain when the patient is sitting with legs hanging off the exam table and the contralateral leg is brought to the chest and the affected limb fully extended.

In patients with hip pain and bursitis, applying downward pressure will elicit a snapping sound as the iliopsoas snaps over the iliopectineal eminence or femoral head. Flexion, ABduction, and External Rotation (FABER) can also be used to diagnose iliopsoas tendonitis: The test is positive if it elicits pain in the affected extremity or in the sacroiliac joint on the opposite side.

Log roll. A painful response to this test, which involves internally and externally rotating the affected hip while it is relaxed and the knee fully extended, is an indication of synovitis of the hip caused by intra-articular pathology. To test hip stability, externally rotate the leg while it is extended. If the hip is stable, the leg will return to a neutral position; microinstability of the hip is likely if the leg remains in the rotated position.

Muscular strength testing. To assess for tendinopathy in the hip area, the patient should be in a seated position and contract the internal and external rotators and the adductor muscles while you apply resistance. To test abductor strength, have the patient assume a lateral position and hold and abduct the leg on the affected side while you apply resistance.

Hip flexion strength should be tested with the patient in both supine and seated positions. A patient with quadriceps tendonitis will have much greater pain with resisted hip flexion in the supine position vs the seated position; the opposite is true for a patient with iliopsoas tendonitis. (See “Did you know…? Hip pain facts and findings” on for additional diagnostic tips.)

Perform a neurologic evaluation to rule out a back condition that might radiate pain into the anterior hip; ask the patient to do a sit-up while you apply resistance to test for abdominal wall pathology, as well.

Hip palpation. This aspect of the physical exam is important regardless of the cause of the pain but especially crucial for pediatric and adolescent patients, whose anterior hip pain may be related to apophyseal injury. Palpate the superior iliac spine (and over the inferior iliac spine in thin patients) to determine if the sartorius or rectus femoris has been injured. The area just lateral to the symphysis will be tender to palpation in patients with osteitis pubis.

Refer or treat? Here’s what to consider

While the history and physical should provide ample information for a differential diagnosis, imaging studies are generally required for confirmation. Clinical assessment— including physical exam, imaging, and intra-articular injection—of patients with hip pain is up to 98% accurate in identifying hip abnormalities, with arthroscopy as the gold standard.⁴

CASE On physical examination, Mr. Q had right hip extension to 0°, flexion to 110°, external rotation to 50°, and internal rotation to neutral; he also had positive impingement and subspine impingement tests, a painful arc of motion from 12 to 4 o’clock, tenderness over the hip adductor, and pain with resisted hip adduction. He did not walk with a limp.

Diagnostic studies included plain radiographs, which demonstrated that the joint space was well preserved. We identified subtle anatomical abnormalities on the femoral head-neck junction, known as a cam deformity. Magnetic resonance imaging (MRI) revealed an anterior superior labral tear with cartilage delamination.

Stress fractures affect runners, military recruits
In addition to long-distance runners who have recently increased the frequency, duration, or intensity of training,^5,6 military recruits have a higher incidence of stress fractures due to the rapid onset of intensive training. Stress fractures can also occur in patients who do not have a history of intense activity but have metabolically weakened bone, in some cases as a result of an eating disorder.⁷

Patients with femoral neck stress fractures typically present with activity-related anterior groin pain that is relieved by rest; initially, they may be only mildly affected, but the condition worsens in those who continue to “work through the pain.” By the time such individuals seek treatment, they almost always have pain with weight bearing and an antalgic gait.

Symptoms consistent with a femoral neck stress fracture can be further evaluated with plain radiographs. However, x-rays are often negative for up to 4 weeks after the onset of pain.⁸ In cases in which radiographs are negative but the physical exam is suggestive of a stress fracture, MRI—which can detect an abnormality within a day or 2 of injury^8,9—should be used to confirm the diagnosis (FIGURE 1).

FIGURE 1
MRI reveals a femoral neck stress fracture

Treatment. A complete femoral neck fracture portends impending displacement and requires emergent evaluation by an orthopedist, and superior neck changes, also known as tension-sided stress fractures, require urgent treatment with percutaneous screw fixation.⁹ However, compression-sided, or inferior, stress fractures can be treated with restricted weight bearing and activity modification. Gradual resumption of activity is allowed only after the patient has been asymptomatic for 6 weeks; recurrent pain indicates residual stress reaction, and signals that activities should be abated.

Osteonecrosis has many causes

Necrosis of the femoral head is a debilitating and progressive condition primarily affecting patients between the ages of 20 and 50 years.¹⁰ It has multiple (and diverse) causes, including trauma, steroids, alcohol, smoking, lupus, sickle cell anemia, and coagulopathies, as well as scuba diving. But about 20% of cases have no apparent cause.^11,12

Patients with osteonecrosis of the hip typically present with groin pain, often described as a deep, intermittent ache that interferes with activities of daily living. Exam findings depend on the stage of presentation. Early on, pain will occur only with extreme ROM; in advanced cases, ROM is restricted and pain occurs even with limited motion.

Femoral head collapse due to loss of the structural integrity of the subchondral bone—which occurs in 80% of cases¹²—is thought to be caused by decreased blood flow. Plain radiography can confirm a diagnosis of osteonecrosis in patients with advanced disease, but MRI is useful for evaluating patients with earlier clinical presentations.

Treatment of osteonecrosis is dictated by the stage of the disease, but remains controversial because no intervention has been shown to prevent progression in all cases.¹² All patients should be referred to a specialist. Those without collapse or cartilage damage can be treated surgically with core decompression, possibly with additional vascularized bone grafting,^13,14 while those with more advanced disease typically require a total hip replacement at a relatively young age. Results for total hip replacement in patients with osteonecrosis are thought to be inferior to hip replacement in patients with osteoarthritis, although comparison is difficult because of the differences in age and activity levels in these 2 groups.^15,16

Femoral acetabular impingement can occur on the cam or pincer side
FAI pathology can exist on either the femoral (cam) or acetabular (pincer) side,¹⁷ or both.¹⁸ In pure cam impingement, the anterior femoral neck loses its normal concave anatomy and develops a “bump,” which impinges on the anterosuperior labrum during hip flexion, causing labral tears and delamination of the adjacent cartilage.

Pure pincer impingement arises from a prominent acetabular rim, causing overcoverage of the femoral head. Acetabular labral tears result from the repetitive impaction with flexion and internal rotation.

Patients report an insidious onset of groin pain that is exacerbated by flexion-type sports, such as hockey, football, and golf,¹⁹ as well as activities of daily living. In patients with cartilage damage, even walking can be painful. Physical examination of patients with FAI reveals findings that are similar to those of patients with acetabular labral tears. Abnormally large cam lesions or acetabular overcoverage will result in restriction of hip ROM, especially internal rotation and flexion due to a mechanical block.

Radiographs (FIGURE 2) are essential to diagnose FAI and to distinguish this condition from an isolated labral tear.²⁰ Cam impingement will be best demonstrated on a cross-table lateral radiograph, which shows an asphericity of the femoral head/neck junction anteriorly, while pincer impingement will show overcoverage of the femoral head on an AP radiograph. MRI or magnetic resonance arthrography (MRA) is frequently obtained to see whether any cartilage deterioration has occurred. Computed tomography, which can provide a 3-dimensional reproduction of the hip morphology, is often used for preoperative planning when surgical intervention is required.

FIGURE 2
Femoral acetabular impingement with a prominent pincer lesion

Treatment. Surgical intervention is often needed to correct or remove the abnormal anatomy, and both arthroscopic and open surgery are recommended.²⁰ Both methods include osteoplasty at the femoral head/neck junction and/or the acetabular rim to allow the proximal femur to articulate with the acetabulum without injury to the labrum with flexion and internal rotation.²¹

Results of both open and arthroscopic osteoplasty of the femur and acetabulum are still preliminary, with only a few studies reporting mid-term results. Open surgery typically has longer recovery and rehabilitation, but advocates emphasize the improved ability to contour the femur or acetabulum. Both open and arthroscopic procedures have about an 8% to 13% rate of revision in short-term follow-up.¹⁷

Labral tears occur with trauma and certain sports

In addition to FAI, causes of labral tears include dysplasia, instability, trauma, and degeneration, as well as sports that require repetitive hip flexion and/or pivoting, such as hockey, soccer, and football.^22,23

Patients with labral tears typically present with anterior hip pain radiating to the groin, worsening with twisting motions, running, walking, and sitting for prolonged periods. Clicking or catching may occur, as well. Patients may exhibit what one researcher called the “c-sign”—so named for the shape patients make with their hand as they grip their hip just above the greater trochanter to indicate where it hurts.⁴ The work-up for labral tears includes radiographs and, often, MRA, which is nearly 100% specific.²⁴

Treatment. Conservative treatment, which may include activity modification or rest and ice, nonsteroidal anti-inflammatory drugs (NSAIDs), and physical therapy, is often effective for labral tears; when such measures fail, surgical intervention is indicated. A systematic review found a 67% satisfaction rate after 3.5 years in patients who had undergone labral debridement, and complete resolution of mechanical symptoms in nearly 50%.²⁵ Another study showed similar results for hip arthroscopy, with symptom relief continuing for 4.8 years after surgery, on average, and 84% of patients able to return to their previous level of activity.²⁶

The long-term results of labral debridement are unknown, however, and the possibility of an association between this procedure and the development of arthritis remains. Most specialists prefer anatomic repair to restore normal hip kinematics and, potentially, long-term hip function,^27,28 but structural abnormalities must also be addressed to prevent failure of the repair or recurrent tears.

Iliopsoas tendonitis: You know the snap
Often referred to as internal snapping of the hip or internal coxa saltans, iliopsoas tendonitis/bursitis can be a recalcitrant cause of anterior hip pain. Snapping of the iliopsoas leading to bursitis or tendonitis can occur at the iliopectineal eminence, the femoral head, or the lesser trochanter.²⁹ Runners and ballet dancers are often affected.^30,31

Snapping in itself is not an indication of pathology, but chronicity of symptoms is. Patients with relatively acute symptoms typically have only bursitis, while a longer duration of symptoms leads to tendonitis or tendinopathy.³²

Treatment. First-line therapy is nonoperative, and includes activity modification, rest, ice, NSAIDs, and physical therapy. Advise patients to refrain from activities causing pain, and to apply ice to the affected every 20 minutes (with a 20- to 30-minute off period) for one to 2 hours. Physical therapy focuses on stretching the iliopsoas and rectus femoris muscles and strengthening the hamstring muscles to relieve the stress on the anterior pelvis. If such treatment is unsuccessful, ultrasound can be used to guide a therapeutic injection of cortisone.³³ If this fails to bring relief, fractional lengthening of the iliopsoas tendon can be performed to eliminate snapping and relieve pain.³⁴

Muscular strains/avulsion fractures: Sports and age play a role
Although strains can affect any of the anterior muscles around the hip, in active individuals the adductors are most commonly affected. Skeletally immature patients are an exception: apophyseal fractures at the origin of the sartorius and rectus femoris muscles are more common than muscular strains in this patient population.

Athletes who experience adductor strains often play sports in which kicking or frequent changes in direction are required—eg, football, hockey, and soccer³⁵—and generally are able to tell you exactly what they were doing when the injury occurred. Physical examination can reveal focal findings, with swelling and tenderness confined to the anteromedial aspect of the hip along the adductor muscle group. MRI can help differentiate the site of true pathology.³⁶

Treatment of adductor strains is nonoperative, with rest, ice, and activity modification until the tendon heals. In the rare case in which complete tendon avulsion is found, surgical reattachment is needed.

Apophyseal fracture in skeletally immature patients typically occurs during participation in a sport that requires rapid acceleration and deceleration with the hip in an extended position. In such patients, stretching the affected muscle should reproduce the pain. Radiographs are diagnostic and will often show minimal displacement of the apophysis. Treatment is almost always nonoperative. Surgical intervention is rarely needed, and only indicated with displacement >2 cm.³⁷

Athletic pubalgia: A challenging Dx
Also referred to as sports hernia, athletic pubalgia is an enigmatic cause of anterior hip pain in athletes. Diagnosis can be especially challenging, and patients may have lingering symptoms for years before the cause is discovered.³⁸ A sports hernia, unlike other hernias, does not involve a bulge of tissue protruding through one body part into another. In contrast, a sports hernia occurs when the oblique abdominal muscles strain or completely tear away from the pubis. A recent systematic review found that the underlying etiology involves posterior inguinal wall weakening, which can be a result of poorly balanced hip adductor and abdominal muscle activation.³⁹

Patients with sports hernia will often present with anterior hip and/or groin pain, especially with hip extension, twisting, and turning. In addition, patients can have pain in the lower abdomen and, in males, in the testicles. Physical examination will usually show pubic point tenderness, which is exacerbated by resisted hip adduction.⁴⁰ MRI and ultrasound are extremely helpful in diagnosing and forming a treatment plan.³⁹

The initial treatment of choice for sports hernias is nonoperative, and the first step is always activity modification or temporary avoidance of symptom-producing activities. Additional modalities include NSAIDs, ice, and physical therapy to strengthen the surrounding muscles. Surgical intervention, if needed, may be done laparoscopically or via an open approach with direct repair.^40,41

Less common causes to consider
While the conditions detailed here account for most anterior hip etiologies, there are other less common causes to consider. One such cause is osteitis pubis, an umbrella term for conditions that affect the area surrounding the symphysis pubis. Patients with osteitis pubis present with pain over the anterior aspect of the pelvis that is worse with sit-ups, rising from a chair, or any activity where contraction of the rectus muscles occurs.²⁹ Tenderness is found directly over and just lateral to the pubic symphysis. Radiographs are frequently negative, but occasionally chronic degenerative changes at the symphysis are present in addition to symphyseal narrowing. Additional imaging is often necessary for diagnosis.

Neuropathies. When history, physical examination, and imaging studies have ruled out other causes, neuropathies (ilioinguinal, genitofemoral, and obturator) should be considered, particularly in patients with vague, radiating anterior hip and/or groin pain.⁴² In pediatric patients, Legg-Calve-Perthes disease and slipped capital femoral epiphysis are possibilities, as well.

Getting patients back on track

Rehabilitation after hip injury resulting in anterior hip pain will be determined by the site, type, and mechanism of injury, as well as the severity. Restrictions in weight bearing and the use of an assistive device may be needed to prevent excessive stress on bone and supporting soft-tissue structures in the early stages of healing. Physical therapy, as needed, should initially focus on early controlled ROM of the hip joint to prevent both intra- and extra-articular adhesions and excessive scar tissue formation.²

For patients who undergo surgery, much of the focus will be on strengthening the supporting musculature—the hip abductor group, anterior and posterior thigh musculature, and core stabilizing muscles. Neuromuscular training may be needed to promote normal biomechanics and minimize compensatory movement patterns. For athletes, cardiovascular training and a return-to-play program should be implemented, as well.^2,43,44

CASE Mr. Q was diagnosed with right hip pain due to a labral tear secondary to a cam femoral acetabular impingement. Given that he had failed nonoperative treatment and had long-standing pain, we recommended surgery for this patient. He underwent right hip arthroscopic labral repair, acetabular rim trimming, acetabular microfracture, femoral osteochondroplasty with capsular plication. At 12-month follow-up, he was doing well, with resolution of the presurgical pain and return to all athletic activities.

CORRESPONDENCE Rachel M. Frank, MD, Department of Orthopedic Surgery, Rush University Medical Center, 1611 West Harrison Street, Suite 300, Chicago, IL 60612; [email protected]

Hip pain is a common complaint, and commonly misunderstood. Although the pain can be associated with a broad spectrum of conditions, the presentation is often vague and nonspecific.

Thus, hip pain and injury are frequently attributed, often incorrectly, to a “hip pointer”—a contusion of soft tissues against the iliac crest. It’s not unusual for patients who receive this diagnosis to be treated conservatively for prolonged periods, leading some previously active individuals to abandon their favorite sport or self-impose limits on the activities they engage in.¹

But it doesn’t have to be this way.

Minimally invasive hip arthroscopy and advances in imaging, instrumentation, and devices have made it easier to identify and address underlying pathology associated with hip pain, helping patients return to their previous level of activity more rapidly.^2,3 And, while many conditions associated with hip pain can be treated conservatively, family physicians—whom patients often go to first—should not hesitate to provide a referral when more aggressive treatment or diagnostic confirmation is needed.

We created this guide with family physicians in mind. Our focus here is primarily on anterior hip pain—the most common presentation—in active, or athletic, patients.

When did the pain begin? Where does it hurt?

Before performing a physical examination, find out as much as possible about the onset of pain and when and under what circumstances it occurs. (A review of hip anatomy is provided here.) Did it begin suddenly, after an acute injury or a particular physical maneuver? Or is the pain insidious, as was the case with one of our patients?

Hip anatomy: A brief review

Osseous morphology of the hip includes the anterior superior iliac spine, the origin of the sartorius muscle and the ilioinguinal ligament. The anterior inferior iliac spine attaches to the rectus femoris, a major hip flexor and knee extender. The adductors of the hip originate in the anterior pelvic region.

The inguinal canal contains the ilioinguinal nerve, which is responsible for radiation of pain to the anterior hip. The hip joint itself is a spheroid comprising the femoral head and acetabulum, with most of the articular hip innervated by the femoral or obturator nerves.

Most intra-articular conditions radiate to the anterior groin or hip, although there are cases in which the pain is referred to either the lateral aspect of the hip or the buttocks. The iliopsoas muscle is the major hip flexor, and crosses under the ilioinguinal ligament to insert on the lesser tuberosity after crossing over the anterior capsule of the hip. A large bursa surrounds it, helping the tendon glide smoothly over the hip.

CASE Mack Q, a 27-year-old man with an 8-month history of right hip pain, sought care at our medical center for an achy pain in his right groin; he also described an occasional “clicking and popping sensation” in his groin but denied any trauma. The pain worsened with prolonged sitting and certain activities, such as squatting, twisting, and putting on shoes and socks. Our patient had stopped playing soccer because it hurt too much. He had tried physical therapy, oral anti-inflammatories, and a corticosteroid injection, with little relief.

Start with a gait assessment
The physical examination should begin with a gait assessment. Consider the patient’s ability to bear weight and his or her foot angle.

An individual with a stress fracture will have difficulty bearing weight on the affected side, resulting in a limp, or antalgic gait. A patient with femoral acetabular impingement (FAI) will often exhibit greater external rotation of the foot on the affected side compared with the other foot. And a patient with weakened abductor muscles, typically because of severe osteoarthritis, will exhibit the Trendelenburg sign—a pelvic tilt when the weight is shifted to the affected extremity.

Although most individuals with hip pain will not have an obvious gait abnormality, any patient who walks with a limp or needs crutches requires an immediate referral to an orthopedic surgeon.

Include these elements in the physical exam
Examine the hip with the patient sitting on the side of the exam table. Assess range of motion (ROM), comparing the range of flexion, extension, and internal/external rotation on the affected and unaffected sides. Include the following maneuvers:

Impingement testing. In patients with FAI and osteoarthritis, impingement testing—encompassing Flexion, ADDuction, and Internal Rotation (FADDIR)—will elicit pain. The maneuver can be tested starting at 45° of hip flexion, increasing to approximately 120°. Pain with <45° of hip flexion indicates that the impingement is severe.

Such testing can also reveal labral tears, which may be caused by FAI or other structural abnormalities. In a patient with anterior labral tears, FADDIR will produce groin pain; posterior labral tears will produce pain when the patient is sitting with legs hanging off the exam table and the contralateral leg is brought to the chest and the affected limb fully extended.

In patients with hip pain and bursitis, applying downward pressure will elicit a snapping sound as the iliopsoas snaps over the iliopectineal eminence or femoral head. Flexion, ABduction, and External Rotation (FABER) can also be used to diagnose iliopsoas tendonitis: The test is positive if it elicits pain in the affected extremity or in the sacroiliac joint on the opposite side.

Log roll. A painful response to this test, which involves internally and externally rotating the affected hip while it is relaxed and the knee fully extended, is an indication of synovitis of the hip caused by intra-articular pathology. To test hip stability, externally rotate the leg while it is extended. If the hip is stable, the leg will return to a neutral position; microinstability of the hip is likely if the leg remains in the rotated position.

Muscular strength testing. To assess for tendinopathy in the hip area, the patient should be in a seated position and contract the internal and external rotators and the adductor muscles while you apply resistance. To test abductor strength, have the patient assume a lateral position and hold and abduct the leg on the affected side while you apply resistance.

Hip flexion strength should be tested with the patient in both supine and seated positions. A patient with quadriceps tendonitis will have much greater pain with resisted hip flexion in the supine position vs the seated position; the opposite is true for a patient with iliopsoas tendonitis. (See “Did you know…? Hip pain facts and findings” on for additional diagnostic tips.)

Perform a neurologic evaluation to rule out a back condition that might radiate pain into the anterior hip; ask the patient to do a sit-up while you apply resistance to test for abdominal wall pathology, as well.

Hip palpation. This aspect of the physical exam is important regardless of the cause of the pain but especially crucial for pediatric and adolescent patients, whose anterior hip pain may be related to apophyseal injury. Palpate the superior iliac spine (and over the inferior iliac spine in thin patients) to determine if the sartorius or rectus femoris has been injured. The area just lateral to the symphysis will be tender to palpation in patients with osteitis pubis.

Refer or treat? Here’s what to consider

While the history and physical should provide ample information for a differential diagnosis, imaging studies are generally required for confirmation. Clinical assessment— including physical exam, imaging, and intra-articular injection—of patients with hip pain is up to 98% accurate in identifying hip abnormalities, with arthroscopy as the gold standard.⁴

CASE On physical examination, Mr. Q had right hip extension to 0°, flexion to 110°, external rotation to 50°, and internal rotation to neutral; he also had positive impingement and subspine impingement tests, a painful arc of motion from 12 to 4 o’clock, tenderness over the hip adductor, and pain with resisted hip adduction. He did not walk with a limp.

Diagnostic studies included plain radiographs, which demonstrated that the joint space was well preserved. We identified subtle anatomical abnormalities on the femoral head-neck junction, known as a cam deformity. Magnetic resonance imaging (MRI) revealed an anterior superior labral tear with cartilage delamination.

Stress fractures affect runners, military recruits
In addition to long-distance runners who have recently increased the frequency, duration, or intensity of training,^5,6 military recruits have a higher incidence of stress fractures due to the rapid onset of intensive training. Stress fractures can also occur in patients who do not have a history of intense activity but have metabolically weakened bone, in some cases as a result of an eating disorder.⁷

Patients with femoral neck stress fractures typically present with activity-related anterior groin pain that is relieved by rest; initially, they may be only mildly affected, but the condition worsens in those who continue to “work through the pain.” By the time such individuals seek treatment, they almost always have pain with weight bearing and an antalgic gait.

Symptoms consistent with a femoral neck stress fracture can be further evaluated with plain radiographs. However, x-rays are often negative for up to 4 weeks after the onset of pain.⁸ In cases in which radiographs are negative but the physical exam is suggestive of a stress fracture, MRI—which can detect an abnormality within a day or 2 of injury^8,9—should be used to confirm the diagnosis (FIGURE 1).

FIGURE 1
MRI reveals a femoral neck stress fracture

Treatment. A complete femoral neck fracture portends impending displacement and requires emergent evaluation by an orthopedist, and superior neck changes, also known as tension-sided stress fractures, require urgent treatment with percutaneous screw fixation.⁹ However, compression-sided, or inferior, stress fractures can be treated with restricted weight bearing and activity modification. Gradual resumption of activity is allowed only after the patient has been asymptomatic for 6 weeks; recurrent pain indicates residual stress reaction, and signals that activities should be abated.

Osteonecrosis has many causes

Necrosis of the femoral head is a debilitating and progressive condition primarily affecting patients between the ages of 20 and 50 years.¹⁰ It has multiple (and diverse) causes, including trauma, steroids, alcohol, smoking, lupus, sickle cell anemia, and coagulopathies, as well as scuba diving. But about 20% of cases have no apparent cause.^11,12

Patients with osteonecrosis of the hip typically present with groin pain, often described as a deep, intermittent ache that interferes with activities of daily living. Exam findings depend on the stage of presentation. Early on, pain will occur only with extreme ROM; in advanced cases, ROM is restricted and pain occurs even with limited motion.

Femoral head collapse due to loss of the structural integrity of the subchondral bone—which occurs in 80% of cases¹²—is thought to be caused by decreased blood flow. Plain radiography can confirm a diagnosis of osteonecrosis in patients with advanced disease, but MRI is useful for evaluating patients with earlier clinical presentations.

Treatment of osteonecrosis is dictated by the stage of the disease, but remains controversial because no intervention has been shown to prevent progression in all cases.¹² All patients should be referred to a specialist. Those without collapse or cartilage damage can be treated surgically with core decompression, possibly with additional vascularized bone grafting,^13,14 while those with more advanced disease typically require a total hip replacement at a relatively young age. Results for total hip replacement in patients with osteonecrosis are thought to be inferior to hip replacement in patients with osteoarthritis, although comparison is difficult because of the differences in age and activity levels in these 2 groups.^15,16

Femoral acetabular impingement can occur on the cam or pincer side
FAI pathology can exist on either the femoral (cam) or acetabular (pincer) side,¹⁷ or both.¹⁸ In pure cam impingement, the anterior femoral neck loses its normal concave anatomy and develops a “bump,” which impinges on the anterosuperior labrum during hip flexion, causing labral tears and delamination of the adjacent cartilage.

Pure pincer impingement arises from a prominent acetabular rim, causing overcoverage of the femoral head. Acetabular labral tears result from the repetitive impaction with flexion and internal rotation.

Patients report an insidious onset of groin pain that is exacerbated by flexion-type sports, such as hockey, football, and golf,¹⁹ as well as activities of daily living. In patients with cartilage damage, even walking can be painful. Physical examination of patients with FAI reveals findings that are similar to those of patients with acetabular labral tears. Abnormally large cam lesions or acetabular overcoverage will result in restriction of hip ROM, especially internal rotation and flexion due to a mechanical block.

Radiographs (FIGURE 2) are essential to diagnose FAI and to distinguish this condition from an isolated labral tear.²⁰ Cam impingement will be best demonstrated on a cross-table lateral radiograph, which shows an asphericity of the femoral head/neck junction anteriorly, while pincer impingement will show overcoverage of the femoral head on an AP radiograph. MRI or magnetic resonance arthrography (MRA) is frequently obtained to see whether any cartilage deterioration has occurred. Computed tomography, which can provide a 3-dimensional reproduction of the hip morphology, is often used for preoperative planning when surgical intervention is required.

FIGURE 2
Femoral acetabular impingement with a prominent pincer lesion

Treatment. Surgical intervention is often needed to correct or remove the abnormal anatomy, and both arthroscopic and open surgery are recommended.²⁰ Both methods include osteoplasty at the femoral head/neck junction and/or the acetabular rim to allow the proximal femur to articulate with the acetabulum without injury to the labrum with flexion and internal rotation.²¹

Results of both open and arthroscopic osteoplasty of the femur and acetabulum are still preliminary, with only a few studies reporting mid-term results. Open surgery typically has longer recovery and rehabilitation, but advocates emphasize the improved ability to contour the femur or acetabulum. Both open and arthroscopic procedures have about an 8% to 13% rate of revision in short-term follow-up.¹⁷

Labral tears occur with trauma and certain sports

In addition to FAI, causes of labral tears include dysplasia, instability, trauma, and degeneration, as well as sports that require repetitive hip flexion and/or pivoting, such as hockey, soccer, and football.^22,23

Patients with labral tears typically present with anterior hip pain radiating to the groin, worsening with twisting motions, running, walking, and sitting for prolonged periods. Clicking or catching may occur, as well. Patients may exhibit what one researcher called the “c-sign”—so named for the shape patients make with their hand as they grip their hip just above the greater trochanter to indicate where it hurts.⁴ The work-up for labral tears includes radiographs and, often, MRA, which is nearly 100% specific.²⁴

Treatment. Conservative treatment, which may include activity modification or rest and ice, nonsteroidal anti-inflammatory drugs (NSAIDs), and physical therapy, is often effective for labral tears; when such measures fail, surgical intervention is indicated. A systematic review found a 67% satisfaction rate after 3.5 years in patients who had undergone labral debridement, and complete resolution of mechanical symptoms in nearly 50%.²⁵ Another study showed similar results for hip arthroscopy, with symptom relief continuing for 4.8 years after surgery, on average, and 84% of patients able to return to their previous level of activity.²⁶

The long-term results of labral debridement are unknown, however, and the possibility of an association between this procedure and the development of arthritis remains. Most specialists prefer anatomic repair to restore normal hip kinematics and, potentially, long-term hip function,^27,28 but structural abnormalities must also be addressed to prevent failure of the repair or recurrent tears.

Iliopsoas tendonitis: You know the snap
Often referred to as internal snapping of the hip or internal coxa saltans, iliopsoas tendonitis/bursitis can be a recalcitrant cause of anterior hip pain. Snapping of the iliopsoas leading to bursitis or tendonitis can occur at the iliopectineal eminence, the femoral head, or the lesser trochanter.²⁹ Runners and ballet dancers are often affected.^30,31

Snapping in itself is not an indication of pathology, but chronicity of symptoms is. Patients with relatively acute symptoms typically have only bursitis, while a longer duration of symptoms leads to tendonitis or tendinopathy.³²

Treatment. First-line therapy is nonoperative, and includes activity modification, rest, ice, NSAIDs, and physical therapy. Advise patients to refrain from activities causing pain, and to apply ice to the affected every 20 minutes (with a 20- to 30-minute off period) for one to 2 hours. Physical therapy focuses on stretching the iliopsoas and rectus femoris muscles and strengthening the hamstring muscles to relieve the stress on the anterior pelvis. If such treatment is unsuccessful, ultrasound can be used to guide a therapeutic injection of cortisone.³³ If this fails to bring relief, fractional lengthening of the iliopsoas tendon can be performed to eliminate snapping and relieve pain.³⁴

Muscular strains/avulsion fractures: Sports and age play a role
Although strains can affect any of the anterior muscles around the hip, in active individuals the adductors are most commonly affected. Skeletally immature patients are an exception: apophyseal fractures at the origin of the sartorius and rectus femoris muscles are more common than muscular strains in this patient population.

Athletes who experience adductor strains often play sports in which kicking or frequent changes in direction are required—eg, football, hockey, and soccer³⁵—and generally are able to tell you exactly what they were doing when the injury occurred. Physical examination can reveal focal findings, with swelling and tenderness confined to the anteromedial aspect of the hip along the adductor muscle group. MRI can help differentiate the site of true pathology.³⁶

Treatment of adductor strains is nonoperative, with rest, ice, and activity modification until the tendon heals. In the rare case in which complete tendon avulsion is found, surgical reattachment is needed.

Apophyseal fracture in skeletally immature patients typically occurs during participation in a sport that requires rapid acceleration and deceleration with the hip in an extended position. In such patients, stretching the affected muscle should reproduce the pain. Radiographs are diagnostic and will often show minimal displacement of the apophysis. Treatment is almost always nonoperative. Surgical intervention is rarely needed, and only indicated with displacement >2 cm.³⁷

Athletic pubalgia: A challenging Dx
Also referred to as sports hernia, athletic pubalgia is an enigmatic cause of anterior hip pain in athletes. Diagnosis can be especially challenging, and patients may have lingering symptoms for years before the cause is discovered.³⁸ A sports hernia, unlike other hernias, does not involve a bulge of tissue protruding through one body part into another. In contrast, a sports hernia occurs when the oblique abdominal muscles strain or completely tear away from the pubis. A recent systematic review found that the underlying etiology involves posterior inguinal wall weakening, which can be a result of poorly balanced hip adductor and abdominal muscle activation.³⁹

Patients with sports hernia will often present with anterior hip and/or groin pain, especially with hip extension, twisting, and turning. In addition, patients can have pain in the lower abdomen and, in males, in the testicles. Physical examination will usually show pubic point tenderness, which is exacerbated by resisted hip adduction.⁴⁰ MRI and ultrasound are extremely helpful in diagnosing and forming a treatment plan.³⁹

The initial treatment of choice for sports hernias is nonoperative, and the first step is always activity modification or temporary avoidance of symptom-producing activities. Additional modalities include NSAIDs, ice, and physical therapy to strengthen the surrounding muscles. Surgical intervention, if needed, may be done laparoscopically or via an open approach with direct repair.^40,41

Less common causes to consider
While the conditions detailed here account for most anterior hip etiologies, there are other less common causes to consider. One such cause is osteitis pubis, an umbrella term for conditions that affect the area surrounding the symphysis pubis. Patients with osteitis pubis present with pain over the anterior aspect of the pelvis that is worse with sit-ups, rising from a chair, or any activity where contraction of the rectus muscles occurs.²⁹ Tenderness is found directly over and just lateral to the pubic symphysis. Radiographs are frequently negative, but occasionally chronic degenerative changes at the symphysis are present in addition to symphyseal narrowing. Additional imaging is often necessary for diagnosis.

Neuropathies. When history, physical examination, and imaging studies have ruled out other causes, neuropathies (ilioinguinal, genitofemoral, and obturator) should be considered, particularly in patients with vague, radiating anterior hip and/or groin pain.⁴² In pediatric patients, Legg-Calve-Perthes disease and slipped capital femoral epiphysis are possibilities, as well.

Getting patients back on track

Rehabilitation after hip injury resulting in anterior hip pain will be determined by the site, type, and mechanism of injury, as well as the severity. Restrictions in weight bearing and the use of an assistive device may be needed to prevent excessive stress on bone and supporting soft-tissue structures in the early stages of healing. Physical therapy, as needed, should initially focus on early controlled ROM of the hip joint to prevent both intra- and extra-articular adhesions and excessive scar tissue formation.²

For patients who undergo surgery, much of the focus will be on strengthening the supporting musculature—the hip abductor group, anterior and posterior thigh musculature, and core stabilizing muscles. Neuromuscular training may be needed to promote normal biomechanics and minimize compensatory movement patterns. For athletes, cardiovascular training and a return-to-play program should be implemented, as well.^2,43,44

CASE Mr. Q was diagnosed with right hip pain due to a labral tear secondary to a cam femoral acetabular impingement. Given that he had failed nonoperative treatment and had long-standing pain, we recommended surgery for this patient. He underwent right hip arthroscopic labral repair, acetabular rim trimming, acetabular microfracture, femoral osteochondroplasty with capsular plication. At 12-month follow-up, he was doing well, with resolution of the presurgical pain and return to all athletic activities.

CORRESPONDENCE Rachel M. Frank, MD, Department of Orthopedic Surgery, Rush University Medical Center, 1611 West Harrison Street, Suite 300, Chicago, IL 60612; [email protected]

Hip pain is a common complaint, and commonly misunderstood. Although the pain can be associated with a broad spectrum of conditions, the presentation is often vague and nonspecific.

Thus, hip pain and injury are frequently attributed, often incorrectly, to a “hip pointer”—a contusion of soft tissues against the iliac crest. It’s not unusual for patients who receive this diagnosis to be treated conservatively for prolonged periods, leading some previously active individuals to abandon their favorite sport or self-impose limits on the activities they engage in.¹

But it doesn’t have to be this way.

Minimally invasive hip arthroscopy and advances in imaging, instrumentation, and devices have made it easier to identify and address underlying pathology associated with hip pain, helping patients return to their previous level of activity more rapidly.^2,3 And, while many conditions associated with hip pain can be treated conservatively, family physicians—whom patients often go to first—should not hesitate to provide a referral when more aggressive treatment or diagnostic confirmation is needed.

We created this guide with family physicians in mind. Our focus here is primarily on anterior hip pain—the most common presentation—in active, or athletic, patients.

When did the pain begin? Where does it hurt?

Before performing a physical examination, find out as much as possible about the onset of pain and when and under what circumstances it occurs. (A review of hip anatomy is provided here.) Did it begin suddenly, after an acute injury or a particular physical maneuver? Or is the pain insidious, as was the case with one of our patients?

Hip anatomy: A brief review

Osseous morphology of the hip includes the anterior superior iliac spine, the origin of the sartorius muscle and the ilioinguinal ligament. The anterior inferior iliac spine attaches to the rectus femoris, a major hip flexor and knee extender. The adductors of the hip originate in the anterior pelvic region.

The inguinal canal contains the ilioinguinal nerve, which is responsible for radiation of pain to the anterior hip. The hip joint itself is a spheroid comprising the femoral head and acetabulum, with most of the articular hip innervated by the femoral or obturator nerves.

Most intra-articular conditions radiate to the anterior groin or hip, although there are cases in which the pain is referred to either the lateral aspect of the hip or the buttocks. The iliopsoas muscle is the major hip flexor, and crosses under the ilioinguinal ligament to insert on the lesser tuberosity after crossing over the anterior capsule of the hip. A large bursa surrounds it, helping the tendon glide smoothly over the hip.

CASE Mack Q, a 27-year-old man with an 8-month history of right hip pain, sought care at our medical center for an achy pain in his right groin; he also described an occasional “clicking and popping sensation” in his groin but denied any trauma. The pain worsened with prolonged sitting and certain activities, such as squatting, twisting, and putting on shoes and socks. Our patient had stopped playing soccer because it hurt too much. He had tried physical therapy, oral anti-inflammatories, and a corticosteroid injection, with little relief.

Start with a gait assessment
The physical examination should begin with a gait assessment. Consider the patient’s ability to bear weight and his or her foot angle.

An individual with a stress fracture will have difficulty bearing weight on the affected side, resulting in a limp, or antalgic gait. A patient with femoral acetabular impingement (FAI) will often exhibit greater external rotation of the foot on the affected side compared with the other foot. And a patient with weakened abductor muscles, typically because of severe osteoarthritis, will exhibit the Trendelenburg sign—a pelvic tilt when the weight is shifted to the affected extremity.

Although most individuals with hip pain will not have an obvious gait abnormality, any patient who walks with a limp or needs crutches requires an immediate referral to an orthopedic surgeon.

Include these elements in the physical exam
Examine the hip with the patient sitting on the side of the exam table. Assess range of motion (ROM), comparing the range of flexion, extension, and internal/external rotation on the affected and unaffected sides. Include the following maneuvers:

Impingement testing. In patients with FAI and osteoarthritis, impingement testing—encompassing Flexion, ADDuction, and Internal Rotation (FADDIR)—will elicit pain. The maneuver can be tested starting at 45° of hip flexion, increasing to approximately 120°. Pain with <45° of hip flexion indicates that the impingement is severe.

Such testing can also reveal labral tears, which may be caused by FAI or other structural abnormalities. In a patient with anterior labral tears, FADDIR will produce groin pain; posterior labral tears will produce pain when the patient is sitting with legs hanging off the exam table and the contralateral leg is brought to the chest and the affected limb fully extended.

In patients with hip pain and bursitis, applying downward pressure will elicit a snapping sound as the iliopsoas snaps over the iliopectineal eminence or femoral head. Flexion, ABduction, and External Rotation (FABER) can also be used to diagnose iliopsoas tendonitis: The test is positive if it elicits pain in the affected extremity or in the sacroiliac joint on the opposite side.

Log roll. A painful response to this test, which involves internally and externally rotating the affected hip while it is relaxed and the knee fully extended, is an indication of synovitis of the hip caused by intra-articular pathology. To test hip stability, externally rotate the leg while it is extended. If the hip is stable, the leg will return to a neutral position; microinstability of the hip is likely if the leg remains in the rotated position.

Muscular strength testing. To assess for tendinopathy in the hip area, the patient should be in a seated position and contract the internal and external rotators and the adductor muscles while you apply resistance. To test abductor strength, have the patient assume a lateral position and hold and abduct the leg on the affected side while you apply resistance.

Hip flexion strength should be tested with the patient in both supine and seated positions. A patient with quadriceps tendonitis will have much greater pain with resisted hip flexion in the supine position vs the seated position; the opposite is true for a patient with iliopsoas tendonitis. (See “Did you know…? Hip pain facts and findings” on for additional diagnostic tips.)

Perform a neurologic evaluation to rule out a back condition that might radiate pain into the anterior hip; ask the patient to do a sit-up while you apply resistance to test for abdominal wall pathology, as well.

Hip palpation. This aspect of the physical exam is important regardless of the cause of the pain but especially crucial for pediatric and adolescent patients, whose anterior hip pain may be related to apophyseal injury. Palpate the superior iliac spine (and over the inferior iliac spine in thin patients) to determine if the sartorius or rectus femoris has been injured. The area just lateral to the symphysis will be tender to palpation in patients with osteitis pubis.

Refer or treat? Here’s what to consider

While the history and physical should provide ample information for a differential diagnosis, imaging studies are generally required for confirmation. Clinical assessment— including physical exam, imaging, and intra-articular injection—of patients with hip pain is up to 98% accurate in identifying hip abnormalities, with arthroscopy as the gold standard.⁴

CASE On physical examination, Mr. Q had right hip extension to 0°, flexion to 110°, external rotation to 50°, and internal rotation to neutral; he also had positive impingement and subspine impingement tests, a painful arc of motion from 12 to 4 o’clock, tenderness over the hip adductor, and pain with resisted hip adduction. He did not walk with a limp.

Diagnostic studies included plain radiographs, which demonstrated that the joint space was well preserved. We identified subtle anatomical abnormalities on the femoral head-neck junction, known as a cam deformity. Magnetic resonance imaging (MRI) revealed an anterior superior labral tear with cartilage delamination.

Stress fractures affect runners, military recruits
In addition to long-distance runners who have recently increased the frequency, duration, or intensity of training,^5,6 military recruits have a higher incidence of stress fractures due to the rapid onset of intensive training. Stress fractures can also occur in patients who do not have a history of intense activity but have metabolically weakened bone, in some cases as a result of an eating disorder.⁷

Patients with femoral neck stress fractures typically present with activity-related anterior groin pain that is relieved by rest; initially, they may be only mildly affected, but the condition worsens in those who continue to “work through the pain.” By the time such individuals seek treatment, they almost always have pain with weight bearing and an antalgic gait.

Symptoms consistent with a femoral neck stress fracture can be further evaluated with plain radiographs. However, x-rays are often negative for up to 4 weeks after the onset of pain.⁸ In cases in which radiographs are negative but the physical exam is suggestive of a stress fracture, MRI—which can detect an abnormality within a day or 2 of injury^8,9—should be used to confirm the diagnosis (FIGURE 1).

FIGURE 1
MRI reveals a femoral neck stress fracture

Treatment. A complete femoral neck fracture portends impending displacement and requires emergent evaluation by an orthopedist, and superior neck changes, also known as tension-sided stress fractures, require urgent treatment with percutaneous screw fixation.⁹ However, compression-sided, or inferior, stress fractures can be treated with restricted weight bearing and activity modification. Gradual resumption of activity is allowed only after the patient has been asymptomatic for 6 weeks; recurrent pain indicates residual stress reaction, and signals that activities should be abated.

Osteonecrosis has many causes

Necrosis of the femoral head is a debilitating and progressive condition primarily affecting patients between the ages of 20 and 50 years.¹⁰ It has multiple (and diverse) causes, including trauma, steroids, alcohol, smoking, lupus, sickle cell anemia, and coagulopathies, as well as scuba diving. But about 20% of cases have no apparent cause.^11,12

Patients with osteonecrosis of the hip typically present with groin pain, often described as a deep, intermittent ache that interferes with activities of daily living. Exam findings depend on the stage of presentation. Early on, pain will occur only with extreme ROM; in advanced cases, ROM is restricted and pain occurs even with limited motion.

Femoral head collapse due to loss of the structural integrity of the subchondral bone—which occurs in 80% of cases¹²—is thought to be caused by decreased blood flow. Plain radiography can confirm a diagnosis of osteonecrosis in patients with advanced disease, but MRI is useful for evaluating patients with earlier clinical presentations.

Treatment of osteonecrosis is dictated by the stage of the disease, but remains controversial because no intervention has been shown to prevent progression in all cases.¹² All patients should be referred to a specialist. Those without collapse or cartilage damage can be treated surgically with core decompression, possibly with additional vascularized bone grafting,^13,14 while those with more advanced disease typically require a total hip replacement at a relatively young age. Results for total hip replacement in patients with osteonecrosis are thought to be inferior to hip replacement in patients with osteoarthritis, although comparison is difficult because of the differences in age and activity levels in these 2 groups.^15,16

Femoral acetabular impingement can occur on the cam or pincer side
FAI pathology can exist on either the femoral (cam) or acetabular (pincer) side,¹⁷ or both.¹⁸ In pure cam impingement, the anterior femoral neck loses its normal concave anatomy and develops a “bump,” which impinges on the anterosuperior labrum during hip flexion, causing labral tears and delamination of the adjacent cartilage.

Pure pincer impingement arises from a prominent acetabular rim, causing overcoverage of the femoral head. Acetabular labral tears result from the repetitive impaction with flexion and internal rotation.

Patients report an insidious onset of groin pain that is exacerbated by flexion-type sports, such as hockey, football, and golf,¹⁹ as well as activities of daily living. In patients with cartilage damage, even walking can be painful. Physical examination of patients with FAI reveals findings that are similar to those of patients with acetabular labral tears. Abnormally large cam lesions or acetabular overcoverage will result in restriction of hip ROM, especially internal rotation and flexion due to a mechanical block.

Radiographs (FIGURE 2) are essential to diagnose FAI and to distinguish this condition from an isolated labral tear.²⁰ Cam impingement will be best demonstrated on a cross-table lateral radiograph, which shows an asphericity of the femoral head/neck junction anteriorly, while pincer impingement will show overcoverage of the femoral head on an AP radiograph. MRI or magnetic resonance arthrography (MRA) is frequently obtained to see whether any cartilage deterioration has occurred. Computed tomography, which can provide a 3-dimensional reproduction of the hip morphology, is often used for preoperative planning when surgical intervention is required.

FIGURE 2
Femoral acetabular impingement with a prominent pincer lesion

Treatment. Surgical intervention is often needed to correct or remove the abnormal anatomy, and both arthroscopic and open surgery are recommended.²⁰ Both methods include osteoplasty at the femoral head/neck junction and/or the acetabular rim to allow the proximal femur to articulate with the acetabulum without injury to the labrum with flexion and internal rotation.²¹

Results of both open and arthroscopic osteoplasty of the femur and acetabulum are still preliminary, with only a few studies reporting mid-term results. Open surgery typically has longer recovery and rehabilitation, but advocates emphasize the improved ability to contour the femur or acetabulum. Both open and arthroscopic procedures have about an 8% to 13% rate of revision in short-term follow-up.¹⁷

Labral tears occur with trauma and certain sports

In addition to FAI, causes of labral tears include dysplasia, instability, trauma, and degeneration, as well as sports that require repetitive hip flexion and/or pivoting, such as hockey, soccer, and football.^22,23

Patients with labral tears typically present with anterior hip pain radiating to the groin, worsening with twisting motions, running, walking, and sitting for prolonged periods. Clicking or catching may occur, as well. Patients may exhibit what one researcher called the “c-sign”—so named for the shape patients make with their hand as they grip their hip just above the greater trochanter to indicate where it hurts.⁴ The work-up for labral tears includes radiographs and, often, MRA, which is nearly 100% specific.²⁴

Treatment. Conservative treatment, which may include activity modification or rest and ice, nonsteroidal anti-inflammatory drugs (NSAIDs), and physical therapy, is often effective for labral tears; when such measures fail, surgical intervention is indicated. A systematic review found a 67% satisfaction rate after 3.5 years in patients who had undergone labral debridement, and complete resolution of mechanical symptoms in nearly 50%.²⁵ Another study showed similar results for hip arthroscopy, with symptom relief continuing for 4.8 years after surgery, on average, and 84% of patients able to return to their previous level of activity.²⁶

The long-term results of labral debridement are unknown, however, and the possibility of an association between this procedure and the development of arthritis remains. Most specialists prefer anatomic repair to restore normal hip kinematics and, potentially, long-term hip function,^27,28 but structural abnormalities must also be addressed to prevent failure of the repair or recurrent tears.

Iliopsoas tendonitis: You know the snap
Often referred to as internal snapping of the hip or internal coxa saltans, iliopsoas tendonitis/bursitis can be a recalcitrant cause of anterior hip pain. Snapping of the iliopsoas leading to bursitis or tendonitis can occur at the iliopectineal eminence, the femoral head, or the lesser trochanter.²⁹ Runners and ballet dancers are often affected.^30,31

Snapping in itself is not an indication of pathology, but chronicity of symptoms is. Patients with relatively acute symptoms typically have only bursitis, while a longer duration of symptoms leads to tendonitis or tendinopathy.³²

Treatment. First-line therapy is nonoperative, and includes activity modification, rest, ice, NSAIDs, and physical therapy. Advise patients to refrain from activities causing pain, and to apply ice to the affected every 20 minutes (with a 20- to 30-minute off period) for one to 2 hours. Physical therapy focuses on stretching the iliopsoas and rectus femoris muscles and strengthening the hamstring muscles to relieve the stress on the anterior pelvis. If such treatment is unsuccessful, ultrasound can be used to guide a therapeutic injection of cortisone.³³ If this fails to bring relief, fractional lengthening of the iliopsoas tendon can be performed to eliminate snapping and relieve pain.³⁴

Muscular strains/avulsion fractures: Sports and age play a role
Although strains can affect any of the anterior muscles around the hip, in active individuals the adductors are most commonly affected. Skeletally immature patients are an exception: apophyseal fractures at the origin of the sartorius and rectus femoris muscles are more common than muscular strains in this patient population.

Athletes who experience adductor strains often play sports in which kicking or frequent changes in direction are required—eg, football, hockey, and soccer³⁵—and generally are able to tell you exactly what they were doing when the injury occurred. Physical examination can reveal focal findings, with swelling and tenderness confined to the anteromedial aspect of the hip along the adductor muscle group. MRI can help differentiate the site of true pathology.³⁶

Treatment of adductor strains is nonoperative, with rest, ice, and activity modification until the tendon heals. In the rare case in which complete tendon avulsion is found, surgical reattachment is needed.

Apophyseal fracture in skeletally immature patients typically occurs during participation in a sport that requires rapid acceleration and deceleration with the hip in an extended position. In such patients, stretching the affected muscle should reproduce the pain. Radiographs are diagnostic and will often show minimal displacement of the apophysis. Treatment is almost always nonoperative. Surgical intervention is rarely needed, and only indicated with displacement >2 cm.³⁷

Athletic pubalgia: A challenging Dx
Also referred to as sports hernia, athletic pubalgia is an enigmatic cause of anterior hip pain in athletes. Diagnosis can be especially challenging, and patients may have lingering symptoms for years before the cause is discovered.³⁸ A sports hernia, unlike other hernias, does not involve a bulge of tissue protruding through one body part into another. In contrast, a sports hernia occurs when the oblique abdominal muscles strain or completely tear away from the pubis. A recent systematic review found that the underlying etiology involves posterior inguinal wall weakening, which can be a result of poorly balanced hip adductor and abdominal muscle activation.³⁹

Patients with sports hernia will often present with anterior hip and/or groin pain, especially with hip extension, twisting, and turning. In addition, patients can have pain in the lower abdomen and, in males, in the testicles. Physical examination will usually show pubic point tenderness, which is exacerbated by resisted hip adduction.⁴⁰ MRI and ultrasound are extremely helpful in diagnosing and forming a treatment plan.³⁹

The initial treatment of choice for sports hernias is nonoperative, and the first step is always activity modification or temporary avoidance of symptom-producing activities. Additional modalities include NSAIDs, ice, and physical therapy to strengthen the surrounding muscles. Surgical intervention, if needed, may be done laparoscopically or via an open approach with direct repair.^40,41

Less common causes to consider
While the conditions detailed here account for most anterior hip etiologies, there are other less common causes to consider. One such cause is osteitis pubis, an umbrella term for conditions that affect the area surrounding the symphysis pubis. Patients with osteitis pubis present with pain over the anterior aspect of the pelvis that is worse with sit-ups, rising from a chair, or any activity where contraction of the rectus muscles occurs.²⁹ Tenderness is found directly over and just lateral to the pubic symphysis. Radiographs are frequently negative, but occasionally chronic degenerative changes at the symphysis are present in addition to symphyseal narrowing. Additional imaging is often necessary for diagnosis.

Neuropathies. When history, physical examination, and imaging studies have ruled out other causes, neuropathies (ilioinguinal, genitofemoral, and obturator) should be considered, particularly in patients with vague, radiating anterior hip and/or groin pain.⁴² In pediatric patients, Legg-Calve-Perthes disease and slipped capital femoral epiphysis are possibilities, as well.

Getting patients back on track

Rehabilitation after hip injury resulting in anterior hip pain will be determined by the site, type, and mechanism of injury, as well as the severity. Restrictions in weight bearing and the use of an assistive device may be needed to prevent excessive stress on bone and supporting soft-tissue structures in the early stages of healing. Physical therapy, as needed, should initially focus on early controlled ROM of the hip joint to prevent both intra- and extra-articular adhesions and excessive scar tissue formation.²

For patients who undergo surgery, much of the focus will be on strengthening the supporting musculature—the hip abductor group, anterior and posterior thigh musculature, and core stabilizing muscles. Neuromuscular training may be needed to promote normal biomechanics and minimize compensatory movement patterns. For athletes, cardiovascular training and a return-to-play program should be implemented, as well.^2,43,44

CASE Mr. Q was diagnosed with right hip pain due to a labral tear secondary to a cam femoral acetabular impingement. Given that he had failed nonoperative treatment and had long-standing pain, we recommended surgery for this patient. He underwent right hip arthroscopic labral repair, acetabular rim trimming, acetabular microfracture, femoral osteochondroplasty with capsular plication. At 12-month follow-up, he was doing well, with resolution of the presurgical pain and return to all athletic activities.

CORRESPONDENCE Rachel M. Frank, MD, Department of Orthopedic Surgery, Rush University Medical Center, 1611 West Harrison Street, Suite 300, Chicago, IL 60612; [email protected]

CASE Jane K, 52, comes to see you because of discomfort in her right wrist and tingling in her hand. The symptoms began 3 months ago, but have been getting progressively worse, and have started to interfere with her sleep. Ms. K often awakens with “pins and needles” in her hand, and says that she often has the urge to “shake it out.” Her sister has carpal tunnel syndrome (CTS), and Ms. K suspects that she does, too. On exam, you find that Ms. K has a positive Phalen’s and Durkan’s compression test, but normal Tinel’s test. She has normal strength and sensation in her hands. Her neck and upper extremity exam is otherwise unremarkable. You note that her hypothyroidism is well controlled, with a recent thyroid-stimulating hormone level of 1.2 mIU/L.

The patient has tried acetaminophen and ibuprofen, with little relief. She has researched CTS on the Internet and read about cold laser therapy, and wants to know whether you think it will work. What should you tell her?

Carpal tunnel syndrome is one of the most common disorders of the upper extremities and the most prevalent compression neuropathy.¹ About 3% of US adults are affected, typically those between the ages of 40 and 60 years.² Women are almost 3 times more likely than men to develop CTS.¹

Other risk factors include diabetes, hypothyroidism, rheumatoid arthritis, pregnancy, obesity, family history, and trauma. A history of hand-related repetitive motions also increases the risk.^3-5 Evidence does not support a definite link between keyboard or mouse use and CTS; however, occupations that require use of hand-operated vibratory tools or repeated and forceful movements of the hand/wrist (such as assembly work and food processing or packaging) are associated with CTS.⁶

The optimal diagnostic approach incorporates history and physical exam findings, including the results of a number of provocative maneuvers, as well as electrodiagnostic studies (EDS) in some cases.⁷ While surgery is the definitive treatment for CTS, numerous nonsurgical options exist, including splinting, corticosteroids, and a variety of alternative therapies, some of which (eg, chiropractic and cold laser therapy) have little evidence to support them.

Because family physicians are often the first to see patients with symptoms associated with CTS, you need to know what to look for, when to test, and whether to provide treatment or a referral. Here’s what to keep in mind.

Clinical presentation of CTS

Increased pressure in the carpal tunnel compresses the median nerve, leading to numbness, tingling, or pain in the palmar aspect of the first 3 fingers and the radial half of the fourth (FIGURE). Symptoms vary widely, with pain or numbness localized to the hand or wrist in some cases and pain radiating into the forearm or shoulder in others.

Figure
Compressed median nerve leads to numbness and tingling

Early in the course of CTS, symptoms are often most bothersome at night. In a scenario like that reported by Ms. K, patients are often awakened by numbness or tingling and the desire to shake out the affected hand—a phenomenon known as the flick sign.⁸ Pain and numbness may occur intermittently at first, especially with repetitive wrist motion. Activities such as driving or holding a telephone often aggravate symptoms.

As CTS progresses, the intensity and duration of symptoms increase. Patients may complain of weakness in the hand and report that they often drop things. Paradoxically, patients with more severe CTS sometimes have less pain, rather than more, because of increasing sensory loss.⁹

Late in the course of CTS, physical exam findings typically include decreased sensation in the fingers innervated by the median nerve, sparing the thenar eminence. (A loss of sensation in the thenar eminence suggests the presence of a lesion proximal to the carpal tunnel, rather than CTS itself.¹⁰) In advanced cases, weakness of thumb abduction and opposition may occur, as well as atrophy of the thenar eminence.¹¹

Sudden onset of severe symptoms with minimal trauma to the wrist should raise suspicion of a hematoma in the carpal tunnel—a particular risk for patients who have a clotting disorder or are being treated with newer anticoagulants such as dabigatran. Prompt surgical decompression is required to prevent permanent median nerve damage in such cases.¹²

Include these maneuvers in the physical exam

A thorough evaluation of the neck, shoulder, elbow, and wrist is crucial for all patients with signs and symptoms associated with CTS. Provocative maneuvers (TABLE 1)^7,13 are also important as an aid to diagnosis. The results of the following tests should be viewed with caution, however, as studies have found wide variations in their sensitivity and specificity:

TABLE 1
Diagnosing carpal tunnel syndrome, using physical maneuvers^7,13

Phalen’s maneuver. The patient flexes his or her wrist with the elbow in full extension to increase pressure on the median nerve, and holds the position for 60 seconds. The onset of pain or paresthesia is a positive test. A meta-analysis found the sensitivity and specificity of a positive Phalen’s sign to be 68% and 73%, respectively.⁷

Tinel’s test. Tap the volar surface of the patient’s wrist just proximal to, or on top of, the carpal tunnel. Pain or paresthesia in the fingers innervated by the median nerve as a result of the percussion constitutes a positive result. Tinel’s test is less sensitive than the Phalen’s maneuver, but has a similar specificity.¹³

The median nerve (Durkan’s) compression test. Apply pressure over the transverse carpal ligament; the test is positive if pain or paresthesia develops within 30 seconds.⁷

The hand elevation test. The patient raises both hands overhead for 60 seconds; here, too, pain or paresthesia is a positive result.¹⁴

Combining results of provocative maneuvers may increase sensitivity and specificity. Positive results in both the Phalen’s and median nerve compression tests, for example, have a collective sensitivity and specificity of 80% and 92%, respectively.¹³

When (or whether) to order electrodiagnostic studies

While some clinicians consider EDS to be the gold standard in CTS diagnosis,⁶ evidence is limited. One issue is the lack of universally accepted reference standards; another is that most studies have been affected by “spectrum bias.”¹⁵ What’s more, EDS—which include nerve conduction studies (NCS) and electromyography (EMG)—do not always correlate directly with symptoms, and 16% to 34% of mild cases can be missed.¹⁶

EDS are useful in many instances, however. EMG can rule out other causes of CTS symptoms (TABLE 2 details the differential diagnosis),^7,11 while NCS can aid in diagnosing CTS, gauging its severity, and arriving at a prognosis. Specifically, NCS can detect delayed distal latencies and slowed conduction velocities that can occur when the myelin sheath is damaged by prolonged compression of the median nerve.¹⁷ With more severe compression, axonal damage occurs, as evidenced by reduced action potential amplitudes on NCS. Results of the nerve conduction tests are compared to age-dependent normal values and to results from other nerves on either the same or the contralateral hand. In a 2002 systemic review, the sensitivity of NCS for CTS was 56% to 85% and the specificity was 94% to 99%.¹⁸

TABLE 2
Differential diagnosis for CTS^7,11

Before and after surgery. The American Academy of Orthopedic Surgeons (AAOS) recommends EDS when CTS surgery is being considered. ⁷ EDS may also be used after surgery, to verify neurologic improvement.

Ultrasound. In patients with CTS, ultrasound reveals an increased cross-sectional area of the median nerve, a finding that has prompted studies of this modality as a diagnostic tool.¹⁹ Although evidence suggests that ultrasound’s sensitivity and specificity for CTS would be similar to that of EDS, the optimal cutoff for an abnormal test has not been defined,¹⁹ and ultrasound does not provide information on prognosis or alternate causes.

Thus, AAOS does not currently recommend ultrasound for CTS diagnosis.⁷ Magnetic resonance imaging is inappropriate for routine CTS diagnosis, as well.⁷

Treatment: Start conservatively

Multiple nonsurgical options are available, but the best evidence supports splinting, steroid injection, and oral steroids. Splinting or steroids alone may bring long-term relief for patients with mild to moderate cases;²⁰ in fact, about a third of mild cases improve spontaneously.²¹

Conservative therapy can also provide relief for those who wish to avoid or delay surgery and for cases of transient CTS (pediatric patients, for example, or those whose condition is associated with pregnancy or hypothyroidism).¹⁸ A successful response to therapy can also help to confirm a CTS diagnosis.

Most conservative treatments begin providing relief within 2 to 6 weeks and reach the maximal benefit at 3 months.²² If there is no response after 6 weeks, it’s time to consider another approach.

In initiating splinting or corticosteroids, here’s a look at what to keep in mind:

Splinting. A splint can be used to maintain the wrist in a position with the least intracanal pressure, thereby limiting pressure on the median nerve. Splinting is equally effective whether used continually or only at night.²³

Splinting can relieve symptoms and improve functional status within 2 weeks and the effects can last for 3 to 6 months, eliminating the need for surgery for some patients with mild CTS.^19,20 Nerve gliding exercises, (see image at left), have been evaluated in combination with splinting. While evidence is limited, an at-home program involving these simple exercises may be a beneficial adjunctive treatment with minimal cost or harm.^24,25

Local corticosteroid injection. A Cochrane meta-analysis found significant improvement in symptoms and function at one month among patients with CTS who were treated with steroid injection.²⁶ In many cases, the effects last for many months.

A recent trial found that nearly half of patients with mild to moderate CTS who were treated with steroid injections had improved symptoms and EDS results at the 12-month follow-up.²⁰ However, while patients with severe CTS experienced improvement at 4 weeks postinjection, most eventually required surgery.²⁰

Evidence does not support one particular steroid dose or formulation over another, or one particular injection site.²² Injecting 4 cm proximal to the wrist flexion crease is as effective as a more distal injection.^26,27

Caution is required, however, as risks associated with local injections include tendon rupture and median nerve injury. If a patient experiences intense pain or paresthesia in the median nerve distribution when the needle is inserted, redirect the needle away from the median nerve immediately. For patients who respond well to this treatment, one additional injection can be given after 6 months if symptoms recur.

Oral corticosteroids. Oral prednisone at a dose of 20 mg/d for 2 weeks improves symptoms and function in patients with CTS, but is less effective than steroid injections.²⁸ Treatment for 2 weeks is as effective as treatment for 4 weeks; the effects tend to wane after 8 weeks in both cases.²⁹ Nonsteroidal anti-inflammatory drugs, diuretics, and vitamin B6 have not been found to be effective.³⁰

CASE Ms. K also asks about “those needle tests”—a reference to EDS—which her sister had to diagnose her CTS. You explain that these studies are not necessary at this time because her symptoms are mild and there is no need for other causes to be ruled out.

Instead, you offer her a neutral wrist splint for night-time use and recommend home-based nerve glide exercises. There is no evidence that cold laser therapy is effective, you explain to Ms. K, and it is expensive. She agrees to try the splint and the exercises, and you schedule a follow-up visit in 6 weeks.

A look at alternative therapies
There are many nontraditional treatments for CTS, with yoga, carpal bone mobilization, ergonomic keyboards, and ultrasound therapy among them. Some have limited evidence to suggest that they may have a therapeutic effect;³⁰ others have little or no evidence to support them.

Yoga. Stretching and improved joint posture with specific yoga exercises may lead to decreased compression within the carpal tunnel and increased blood flow to the median nerve. One small study found that yoga was more effective than nocturnal wrist splinting for pain relief, and had similar improvement for nocturnal symptoms and grip strength.³¹

Carpal bone mobilization. One small study found this physical therapy technique, which involves movement of the bones in the wrist, to improve symptoms such as numbness and tingling after 3 weeks of therapy. Yet carpal bone mobilization did not relieve pain or help restore function.³²

Ergonomic keyboard. Patients who use computers at work may find that an ergonomic keyboard helps to relieve pain associated with CTS, compared with a standard keyboard.³³

Therapeutic ultrasound. A recent meta-analysis found that there is only poor-quality evidence for ultrasound as an effective treatment for CTS—a process in which a round-headed instrument applied to the skin delivers sound waves that are absorbed by underlying tissues in the carpal tunnel. And there is insufficient evidence for one type of ultrasound over another, or to suggest that ultrasound is more effective than other nonsurgical treatments.³⁴ Notably, ultrasound takes several weeks to provide a therapeutic benefit.

What about acupuncture? A recent trial found that acupuncture was no more effective than sham acupuncture in relieving symptoms of CTS in patients wearing wrist splints.³⁵ Magnet therapy, chiropractic, and cold laser therapy are not supported by evidence either.²⁸

Is the patient a candidate for surgery?

Carpal tunnel release provides good long-term outcomes for 70% to 90% of patients and is a cost-effective treatment.^36,37 Evidence supports a trial of conservative therapy, however, before considering surgery for patients with mild-to-moderate CTS.²² Future studies are needed to identify prognostic characteristics of patients most likely to respond to each type of intervention, and the optimal timing for surgical release.

Patients with severe CTS—with findings such as thenar atrophy, diminished hand function, and median nerve denervation—should be referred for surgery without delay. This recommendation is based on expert opinion, however, as most clinical trials comparing surgical vs nonsurgical treatment exclude those with severe CTS.³⁸

3 surgical techniques, and a novel approach
Surgical techniques include open, endoscopic, and minimal incision carpal tunnel release, with benefits and drawbacks for each. Compared with open release, for example, patients who undergo endoscopic release have less postoperative pain at 12 weeks, quicker return to work, and fewer wound complications, but are more likely to require surgical revision. And minimal incision release is associated with improved symptoms and function compared with open release.³⁸ However, there is no long-term evidence that any one of these 3 surgical approaches is more effective than another.³⁹

Percutaneous carpal tunnel release is a novel approach that may be offered in outpatient settings, with local anesthesia and ultrasound guidance to avoid median nerve damage.⁴⁰ Because studies of the safety and efficacy of percutaneous carpal tunnel release are limited, however, this approach is considered experimental.⁴¹ Percutaneous release is not a treatment recommended by the AAOS.³⁸

What to tell patients about postop care
Regardless of the method used for carpal tunnel release, most complications are minor—eg, a painful or hypertrophic scar, stiffness, swelling, and pain or tenderness on either side of the incision—and resolve within a few months.⁴² Advise patients not to continue to wear a wrist splint after surgery; doing so can cause stiffness or adhesions and may compromise surgical outcomes.⁴¹ Postoperatively, patients should be instructed to do nerve gliding exercises and to massage their scars, both of which they can safely do at home.⁴³

Patients can expect significant symptomatic improvement within 1 week of surgery, and most will be able to return to normal activities in 2 weeks.⁴⁴ Those with severe CTS should be warned, however, that it could take up to a year to determine the extent of recovery.²² Evidence suggests that from 3% to 19% of patients may have persistent or recurrent symptoms even after carpal tunnel release, with up to 12% requiring surgical revision.⁴⁵

CASE When Ms. K returns, she reports that while there has been some improvement, some activities—such as driving long distances and talking on the phone—still cause numbness and tingling. And, if she doesn’t wear the splint at night, she awakens with tingling in her hands. You discuss 2 options—continued conservative treatment with a local steroid injection, or EDS and surgical referral. The patient opts for the injection and continued use of the nocturnal wrist splint and exercises. When she returns in another 6 weeks, Ms. K reports significant improvement. You agree to stop the wrist splint and exercises and advise her to follow-up on an as-needed basis if the symptoms return.

CORRESPONDENCE Jennifer Wipperman, MD, MPH, Via Christi Family Medicine, 1121 S. Clifton, Wichita, KS 67218; [email protected]

CASE Jane K, 52, comes to see you because of discomfort in her right wrist and tingling in her hand. The symptoms began 3 months ago, but have been getting progressively worse, and have started to interfere with her sleep. Ms. K often awakens with “pins and needles” in her hand, and says that she often has the urge to “shake it out.” Her sister has carpal tunnel syndrome (CTS), and Ms. K suspects that she does, too. On exam, you find that Ms. K has a positive Phalen’s and Durkan’s compression test, but normal Tinel’s test. She has normal strength and sensation in her hands. Her neck and upper extremity exam is otherwise unremarkable. You note that her hypothyroidism is well controlled, with a recent thyroid-stimulating hormone level of 1.2 mIU/L.

The patient has tried acetaminophen and ibuprofen, with little relief. She has researched CTS on the Internet and read about cold laser therapy, and wants to know whether you think it will work. What should you tell her?

Carpal tunnel syndrome is one of the most common disorders of the upper extremities and the most prevalent compression neuropathy.¹ About 3% of US adults are affected, typically those between the ages of 40 and 60 years.² Women are almost 3 times more likely than men to develop CTS.¹

Other risk factors include diabetes, hypothyroidism, rheumatoid arthritis, pregnancy, obesity, family history, and trauma. A history of hand-related repetitive motions also increases the risk.^3-5 Evidence does not support a definite link between keyboard or mouse use and CTS; however, occupations that require use of hand-operated vibratory tools or repeated and forceful movements of the hand/wrist (such as assembly work and food processing or packaging) are associated with CTS.⁶

The optimal diagnostic approach incorporates history and physical exam findings, including the results of a number of provocative maneuvers, as well as electrodiagnostic studies (EDS) in some cases.⁷ While surgery is the definitive treatment for CTS, numerous nonsurgical options exist, including splinting, corticosteroids, and a variety of alternative therapies, some of which (eg, chiropractic and cold laser therapy) have little evidence to support them.

Because family physicians are often the first to see patients with symptoms associated with CTS, you need to know what to look for, when to test, and whether to provide treatment or a referral. Here’s what to keep in mind.

Clinical presentation of CTS

Increased pressure in the carpal tunnel compresses the median nerve, leading to numbness, tingling, or pain in the palmar aspect of the first 3 fingers and the radial half of the fourth (FIGURE). Symptoms vary widely, with pain or numbness localized to the hand or wrist in some cases and pain radiating into the forearm or shoulder in others.

Figure
Compressed median nerve leads to numbness and tingling

Early in the course of CTS, symptoms are often most bothersome at night. In a scenario like that reported by Ms. K, patients are often awakened by numbness or tingling and the desire to shake out the affected hand—a phenomenon known as the flick sign.⁸ Pain and numbness may occur intermittently at first, especially with repetitive wrist motion. Activities such as driving or holding a telephone often aggravate symptoms.

As CTS progresses, the intensity and duration of symptoms increase. Patients may complain of weakness in the hand and report that they often drop things. Paradoxically, patients with more severe CTS sometimes have less pain, rather than more, because of increasing sensory loss.⁹

Late in the course of CTS, physical exam findings typically include decreased sensation in the fingers innervated by the median nerve, sparing the thenar eminence. (A loss of sensation in the thenar eminence suggests the presence of a lesion proximal to the carpal tunnel, rather than CTS itself.¹⁰) In advanced cases, weakness of thumb abduction and opposition may occur, as well as atrophy of the thenar eminence.¹¹

Sudden onset of severe symptoms with minimal trauma to the wrist should raise suspicion of a hematoma in the carpal tunnel—a particular risk for patients who have a clotting disorder or are being treated with newer anticoagulants such as dabigatran. Prompt surgical decompression is required to prevent permanent median nerve damage in such cases.¹²

Include these maneuvers in the physical exam

A thorough evaluation of the neck, shoulder, elbow, and wrist is crucial for all patients with signs and symptoms associated with CTS. Provocative maneuvers (TABLE 1)^7,13 are also important as an aid to diagnosis. The results of the following tests should be viewed with caution, however, as studies have found wide variations in their sensitivity and specificity:

TABLE 1
Diagnosing carpal tunnel syndrome, using physical maneuvers^7,13

Phalen’s maneuver. The patient flexes his or her wrist with the elbow in full extension to increase pressure on the median nerve, and holds the position for 60 seconds. The onset of pain or paresthesia is a positive test. A meta-analysis found the sensitivity and specificity of a positive Phalen’s sign to be 68% and 73%, respectively.⁷

Tinel’s test. Tap the volar surface of the patient’s wrist just proximal to, or on top of, the carpal tunnel. Pain or paresthesia in the fingers innervated by the median nerve as a result of the percussion constitutes a positive result. Tinel’s test is less sensitive than the Phalen’s maneuver, but has a similar specificity.¹³

The median nerve (Durkan’s) compression test. Apply pressure over the transverse carpal ligament; the test is positive if pain or paresthesia develops within 30 seconds.⁷

The hand elevation test. The patient raises both hands overhead for 60 seconds; here, too, pain or paresthesia is a positive result.¹⁴

Combining results of provocative maneuvers may increase sensitivity and specificity. Positive results in both the Phalen’s and median nerve compression tests, for example, have a collective sensitivity and specificity of 80% and 92%, respectively.¹³

When (or whether) to order electrodiagnostic studies

While some clinicians consider EDS to be the gold standard in CTS diagnosis,⁶ evidence is limited. One issue is the lack of universally accepted reference standards; another is that most studies have been affected by “spectrum bias.”¹⁵ What’s more, EDS—which include nerve conduction studies (NCS) and electromyography (EMG)—do not always correlate directly with symptoms, and 16% to 34% of mild cases can be missed.¹⁶

EDS are useful in many instances, however. EMG can rule out other causes of CTS symptoms (TABLE 2 details the differential diagnosis),^7,11 while NCS can aid in diagnosing CTS, gauging its severity, and arriving at a prognosis. Specifically, NCS can detect delayed distal latencies and slowed conduction velocities that can occur when the myelin sheath is damaged by prolonged compression of the median nerve.¹⁷ With more severe compression, axonal damage occurs, as evidenced by reduced action potential amplitudes on NCS. Results of the nerve conduction tests are compared to age-dependent normal values and to results from other nerves on either the same or the contralateral hand. In a 2002 systemic review, the sensitivity of NCS for CTS was 56% to 85% and the specificity was 94% to 99%.¹⁸

TABLE 2
Differential diagnosis for CTS^7,11

Before and after surgery. The American Academy of Orthopedic Surgeons (AAOS) recommends EDS when CTS surgery is being considered. ⁷ EDS may also be used after surgery, to verify neurologic improvement.

Ultrasound. In patients with CTS, ultrasound reveals an increased cross-sectional area of the median nerve, a finding that has prompted studies of this modality as a diagnostic tool.¹⁹ Although evidence suggests that ultrasound’s sensitivity and specificity for CTS would be similar to that of EDS, the optimal cutoff for an abnormal test has not been defined,¹⁹ and ultrasound does not provide information on prognosis or alternate causes.

Thus, AAOS does not currently recommend ultrasound for CTS diagnosis.⁷ Magnetic resonance imaging is inappropriate for routine CTS diagnosis, as well.⁷

Treatment: Start conservatively

Multiple nonsurgical options are available, but the best evidence supports splinting, steroid injection, and oral steroids. Splinting or steroids alone may bring long-term relief for patients with mild to moderate cases;²⁰ in fact, about a third of mild cases improve spontaneously.²¹

Conservative therapy can also provide relief for those who wish to avoid or delay surgery and for cases of transient CTS (pediatric patients, for example, or those whose condition is associated with pregnancy or hypothyroidism).¹⁸ A successful response to therapy can also help to confirm a CTS diagnosis.

Most conservative treatments begin providing relief within 2 to 6 weeks and reach the maximal benefit at 3 months.²² If there is no response after 6 weeks, it’s time to consider another approach.

In initiating splinting or corticosteroids, here’s a look at what to keep in mind:

Splinting. A splint can be used to maintain the wrist in a position with the least intracanal pressure, thereby limiting pressure on the median nerve. Splinting is equally effective whether used continually or only at night.²³

Splinting can relieve symptoms and improve functional status within 2 weeks and the effects can last for 3 to 6 months, eliminating the need for surgery for some patients with mild CTS.^19,20 Nerve gliding exercises, (see image at left), have been evaluated in combination with splinting. While evidence is limited, an at-home program involving these simple exercises may be a beneficial adjunctive treatment with minimal cost or harm.^24,25

Local corticosteroid injection. A Cochrane meta-analysis found significant improvement in symptoms and function at one month among patients with CTS who were treated with steroid injection.²⁶ In many cases, the effects last for many months.

A recent trial found that nearly half of patients with mild to moderate CTS who were treated with steroid injections had improved symptoms and EDS results at the 12-month follow-up.²⁰ However, while patients with severe CTS experienced improvement at 4 weeks postinjection, most eventually required surgery.²⁰

Evidence does not support one particular steroid dose or formulation over another, or one particular injection site.²² Injecting 4 cm proximal to the wrist flexion crease is as effective as a more distal injection.^26,27

Caution is required, however, as risks associated with local injections include tendon rupture and median nerve injury. If a patient experiences intense pain or paresthesia in the median nerve distribution when the needle is inserted, redirect the needle away from the median nerve immediately. For patients who respond well to this treatment, one additional injection can be given after 6 months if symptoms recur.

Oral corticosteroids. Oral prednisone at a dose of 20 mg/d for 2 weeks improves symptoms and function in patients with CTS, but is less effective than steroid injections.²⁸ Treatment for 2 weeks is as effective as treatment for 4 weeks; the effects tend to wane after 8 weeks in both cases.²⁹ Nonsteroidal anti-inflammatory drugs, diuretics, and vitamin B6 have not been found to be effective.³⁰

CASE Ms. K also asks about “those needle tests”—a reference to EDS—which her sister had to diagnose her CTS. You explain that these studies are not necessary at this time because her symptoms are mild and there is no need for other causes to be ruled out.

Instead, you offer her a neutral wrist splint for night-time use and recommend home-based nerve glide exercises. There is no evidence that cold laser therapy is effective, you explain to Ms. K, and it is expensive. She agrees to try the splint and the exercises, and you schedule a follow-up visit in 6 weeks.

A look at alternative therapies
There are many nontraditional treatments for CTS, with yoga, carpal bone mobilization, ergonomic keyboards, and ultrasound therapy among them. Some have limited evidence to suggest that they may have a therapeutic effect;³⁰ others have little or no evidence to support them.

Yoga. Stretching and improved joint posture with specific yoga exercises may lead to decreased compression within the carpal tunnel and increased blood flow to the median nerve. One small study found that yoga was more effective than nocturnal wrist splinting for pain relief, and had similar improvement for nocturnal symptoms and grip strength.³¹

Carpal bone mobilization. One small study found this physical therapy technique, which involves movement of the bones in the wrist, to improve symptoms such as numbness and tingling after 3 weeks of therapy. Yet carpal bone mobilization did not relieve pain or help restore function.³²

Ergonomic keyboard. Patients who use computers at work may find that an ergonomic keyboard helps to relieve pain associated with CTS, compared with a standard keyboard.³³

Therapeutic ultrasound. A recent meta-analysis found that there is only poor-quality evidence for ultrasound as an effective treatment for CTS—a process in which a round-headed instrument applied to the skin delivers sound waves that are absorbed by underlying tissues in the carpal tunnel. And there is insufficient evidence for one type of ultrasound over another, or to suggest that ultrasound is more effective than other nonsurgical treatments.³⁴ Notably, ultrasound takes several weeks to provide a therapeutic benefit.

What about acupuncture? A recent trial found that acupuncture was no more effective than sham acupuncture in relieving symptoms of CTS in patients wearing wrist splints.³⁵ Magnet therapy, chiropractic, and cold laser therapy are not supported by evidence either.²⁸

Is the patient a candidate for surgery?

Carpal tunnel release provides good long-term outcomes for 70% to 90% of patients and is a cost-effective treatment.^36,37 Evidence supports a trial of conservative therapy, however, before considering surgery for patients with mild-to-moderate CTS.²² Future studies are needed to identify prognostic characteristics of patients most likely to respond to each type of intervention, and the optimal timing for surgical release.

Patients with severe CTS—with findings such as thenar atrophy, diminished hand function, and median nerve denervation—should be referred for surgery without delay. This recommendation is based on expert opinion, however, as most clinical trials comparing surgical vs nonsurgical treatment exclude those with severe CTS.³⁸

3 surgical techniques, and a novel approach
Surgical techniques include open, endoscopic, and minimal incision carpal tunnel release, with benefits and drawbacks for each. Compared with open release, for example, patients who undergo endoscopic release have less postoperative pain at 12 weeks, quicker return to work, and fewer wound complications, but are more likely to require surgical revision. And minimal incision release is associated with improved symptoms and function compared with open release.³⁸ However, there is no long-term evidence that any one of these 3 surgical approaches is more effective than another.³⁹

Percutaneous carpal tunnel release is a novel approach that may be offered in outpatient settings, with local anesthesia and ultrasound guidance to avoid median nerve damage.⁴⁰ Because studies of the safety and efficacy of percutaneous carpal tunnel release are limited, however, this approach is considered experimental.⁴¹ Percutaneous release is not a treatment recommended by the AAOS.³⁸

What to tell patients about postop care
Regardless of the method used for carpal tunnel release, most complications are minor—eg, a painful or hypertrophic scar, stiffness, swelling, and pain or tenderness on either side of the incision—and resolve within a few months.⁴² Advise patients not to continue to wear a wrist splint after surgery; doing so can cause stiffness or adhesions and may compromise surgical outcomes.⁴¹ Postoperatively, patients should be instructed to do nerve gliding exercises and to massage their scars, both of which they can safely do at home.⁴³

Patients can expect significant symptomatic improvement within 1 week of surgery, and most will be able to return to normal activities in 2 weeks.⁴⁴ Those with severe CTS should be warned, however, that it could take up to a year to determine the extent of recovery.²² Evidence suggests that from 3% to 19% of patients may have persistent or recurrent symptoms even after carpal tunnel release, with up to 12% requiring surgical revision.⁴⁵

CASE When Ms. K returns, she reports that while there has been some improvement, some activities—such as driving long distances and talking on the phone—still cause numbness and tingling. And, if she doesn’t wear the splint at night, she awakens with tingling in her hands. You discuss 2 options—continued conservative treatment with a local steroid injection, or EDS and surgical referral. The patient opts for the injection and continued use of the nocturnal wrist splint and exercises. When she returns in another 6 weeks, Ms. K reports significant improvement. You agree to stop the wrist splint and exercises and advise her to follow-up on an as-needed basis if the symptoms return.

CORRESPONDENCE Jennifer Wipperman, MD, MPH, Via Christi Family Medicine, 1121 S. Clifton, Wichita, KS 67218; [email protected]

CASE Jane K, 52, comes to see you because of discomfort in her right wrist and tingling in her hand. The symptoms began 3 months ago, but have been getting progressively worse, and have started to interfere with her sleep. Ms. K often awakens with “pins and needles” in her hand, and says that she often has the urge to “shake it out.” Her sister has carpal tunnel syndrome (CTS), and Ms. K suspects that she does, too. On exam, you find that Ms. K has a positive Phalen’s and Durkan’s compression test, but normal Tinel’s test. She has normal strength and sensation in her hands. Her neck and upper extremity exam is otherwise unremarkable. You note that her hypothyroidism is well controlled, with a recent thyroid-stimulating hormone level of 1.2 mIU/L.

The patient has tried acetaminophen and ibuprofen, with little relief. She has researched CTS on the Internet and read about cold laser therapy, and wants to know whether you think it will work. What should you tell her?

Carpal tunnel syndrome is one of the most common disorders of the upper extremities and the most prevalent compression neuropathy.¹ About 3% of US adults are affected, typically those between the ages of 40 and 60 years.² Women are almost 3 times more likely than men to develop CTS.¹

Other risk factors include diabetes, hypothyroidism, rheumatoid arthritis, pregnancy, obesity, family history, and trauma. A history of hand-related repetitive motions also increases the risk.^3-5 Evidence does not support a definite link between keyboard or mouse use and CTS; however, occupations that require use of hand-operated vibratory tools or repeated and forceful movements of the hand/wrist (such as assembly work and food processing or packaging) are associated with CTS.⁶

The optimal diagnostic approach incorporates history and physical exam findings, including the results of a number of provocative maneuvers, as well as electrodiagnostic studies (EDS) in some cases.⁷ While surgery is the definitive treatment for CTS, numerous nonsurgical options exist, including splinting, corticosteroids, and a variety of alternative therapies, some of which (eg, chiropractic and cold laser therapy) have little evidence to support them.

Because family physicians are often the first to see patients with symptoms associated with CTS, you need to know what to look for, when to test, and whether to provide treatment or a referral. Here’s what to keep in mind.

Clinical presentation of CTS

Increased pressure in the carpal tunnel compresses the median nerve, leading to numbness, tingling, or pain in the palmar aspect of the first 3 fingers and the radial half of the fourth (FIGURE). Symptoms vary widely, with pain or numbness localized to the hand or wrist in some cases and pain radiating into the forearm or shoulder in others.

Figure
Compressed median nerve leads to numbness and tingling

Early in the course of CTS, symptoms are often most bothersome at night. In a scenario like that reported by Ms. K, patients are often awakened by numbness or tingling and the desire to shake out the affected hand—a phenomenon known as the flick sign.⁸ Pain and numbness may occur intermittently at first, especially with repetitive wrist motion. Activities such as driving or holding a telephone often aggravate symptoms.

As CTS progresses, the intensity and duration of symptoms increase. Patients may complain of weakness in the hand and report that they often drop things. Paradoxically, patients with more severe CTS sometimes have less pain, rather than more, because of increasing sensory loss.⁹

Late in the course of CTS, physical exam findings typically include decreased sensation in the fingers innervated by the median nerve, sparing the thenar eminence. (A loss of sensation in the thenar eminence suggests the presence of a lesion proximal to the carpal tunnel, rather than CTS itself.¹⁰) In advanced cases, weakness of thumb abduction and opposition may occur, as well as atrophy of the thenar eminence.¹¹

Sudden onset of severe symptoms with minimal trauma to the wrist should raise suspicion of a hematoma in the carpal tunnel—a particular risk for patients who have a clotting disorder or are being treated with newer anticoagulants such as dabigatran. Prompt surgical decompression is required to prevent permanent median nerve damage in such cases.¹²

Include these maneuvers in the physical exam

A thorough evaluation of the neck, shoulder, elbow, and wrist is crucial for all patients with signs and symptoms associated with CTS. Provocative maneuvers (TABLE 1)^7,13 are also important as an aid to diagnosis. The results of the following tests should be viewed with caution, however, as studies have found wide variations in their sensitivity and specificity:

TABLE 1
Diagnosing carpal tunnel syndrome, using physical maneuvers^7,13

Phalen’s maneuver. The patient flexes his or her wrist with the elbow in full extension to increase pressure on the median nerve, and holds the position for 60 seconds. The onset of pain or paresthesia is a positive test. A meta-analysis found the sensitivity and specificity of a positive Phalen’s sign to be 68% and 73%, respectively.⁷

Tinel’s test. Tap the volar surface of the patient’s wrist just proximal to, or on top of, the carpal tunnel. Pain or paresthesia in the fingers innervated by the median nerve as a result of the percussion constitutes a positive result. Tinel’s test is less sensitive than the Phalen’s maneuver, but has a similar specificity.¹³

The median nerve (Durkan’s) compression test. Apply pressure over the transverse carpal ligament; the test is positive if pain or paresthesia develops within 30 seconds.⁷

The hand elevation test. The patient raises both hands overhead for 60 seconds; here, too, pain or paresthesia is a positive result.¹⁴

Combining results of provocative maneuvers may increase sensitivity and specificity. Positive results in both the Phalen’s and median nerve compression tests, for example, have a collective sensitivity and specificity of 80% and 92%, respectively.¹³

When (or whether) to order electrodiagnostic studies

While some clinicians consider EDS to be the gold standard in CTS diagnosis,⁶ evidence is limited. One issue is the lack of universally accepted reference standards; another is that most studies have been affected by “spectrum bias.”¹⁵ What’s more, EDS—which include nerve conduction studies (NCS) and electromyography (EMG)—do not always correlate directly with symptoms, and 16% to 34% of mild cases can be missed.¹⁶

EDS are useful in many instances, however. EMG can rule out other causes of CTS symptoms (TABLE 2 details the differential diagnosis),^7,11 while NCS can aid in diagnosing CTS, gauging its severity, and arriving at a prognosis. Specifically, NCS can detect delayed distal latencies and slowed conduction velocities that can occur when the myelin sheath is damaged by prolonged compression of the median nerve.¹⁷ With more severe compression, axonal damage occurs, as evidenced by reduced action potential amplitudes on NCS. Results of the nerve conduction tests are compared to age-dependent normal values and to results from other nerves on either the same or the contralateral hand. In a 2002 systemic review, the sensitivity of NCS for CTS was 56% to 85% and the specificity was 94% to 99%.¹⁸

TABLE 2
Differential diagnosis for CTS^7,11

Before and after surgery. The American Academy of Orthopedic Surgeons (AAOS) recommends EDS when CTS surgery is being considered. ⁷ EDS may also be used after surgery, to verify neurologic improvement.

Ultrasound. In patients with CTS, ultrasound reveals an increased cross-sectional area of the median nerve, a finding that has prompted studies of this modality as a diagnostic tool.¹⁹ Although evidence suggests that ultrasound’s sensitivity and specificity for CTS would be similar to that of EDS, the optimal cutoff for an abnormal test has not been defined,¹⁹ and ultrasound does not provide information on prognosis or alternate causes.

Thus, AAOS does not currently recommend ultrasound for CTS diagnosis.⁷ Magnetic resonance imaging is inappropriate for routine CTS diagnosis, as well.⁷

Treatment: Start conservatively

Multiple nonsurgical options are available, but the best evidence supports splinting, steroid injection, and oral steroids. Splinting or steroids alone may bring long-term relief for patients with mild to moderate cases;²⁰ in fact, about a third of mild cases improve spontaneously.²¹

Conservative therapy can also provide relief for those who wish to avoid or delay surgery and for cases of transient CTS (pediatric patients, for example, or those whose condition is associated with pregnancy or hypothyroidism).¹⁸ A successful response to therapy can also help to confirm a CTS diagnosis.

Most conservative treatments begin providing relief within 2 to 6 weeks and reach the maximal benefit at 3 months.²² If there is no response after 6 weeks, it’s time to consider another approach.

In initiating splinting or corticosteroids, here’s a look at what to keep in mind:

Splinting. A splint can be used to maintain the wrist in a position with the least intracanal pressure, thereby limiting pressure on the median nerve. Splinting is equally effective whether used continually or only at night.²³

Splinting can relieve symptoms and improve functional status within 2 weeks and the effects can last for 3 to 6 months, eliminating the need for surgery for some patients with mild CTS.^19,20 Nerve gliding exercises, (see image at left), have been evaluated in combination with splinting. While evidence is limited, an at-home program involving these simple exercises may be a beneficial adjunctive treatment with minimal cost or harm.^24,25

Local corticosteroid injection. A Cochrane meta-analysis found significant improvement in symptoms and function at one month among patients with CTS who were treated with steroid injection.²⁶ In many cases, the effects last for many months.

A recent trial found that nearly half of patients with mild to moderate CTS who were treated with steroid injections had improved symptoms and EDS results at the 12-month follow-up.²⁰ However, while patients with severe CTS experienced improvement at 4 weeks postinjection, most eventually required surgery.²⁰

Evidence does not support one particular steroid dose or formulation over another, or one particular injection site.²² Injecting 4 cm proximal to the wrist flexion crease is as effective as a more distal injection.^26,27

Caution is required, however, as risks associated with local injections include tendon rupture and median nerve injury. If a patient experiences intense pain or paresthesia in the median nerve distribution when the needle is inserted, redirect the needle away from the median nerve immediately. For patients who respond well to this treatment, one additional injection can be given after 6 months if symptoms recur.

Oral corticosteroids. Oral prednisone at a dose of 20 mg/d for 2 weeks improves symptoms and function in patients with CTS, but is less effective than steroid injections.²⁸ Treatment for 2 weeks is as effective as treatment for 4 weeks; the effects tend to wane after 8 weeks in both cases.²⁹ Nonsteroidal anti-inflammatory drugs, diuretics, and vitamin B6 have not been found to be effective.³⁰

CASE Ms. K also asks about “those needle tests”—a reference to EDS—which her sister had to diagnose her CTS. You explain that these studies are not necessary at this time because her symptoms are mild and there is no need for other causes to be ruled out.

Instead, you offer her a neutral wrist splint for night-time use and recommend home-based nerve glide exercises. There is no evidence that cold laser therapy is effective, you explain to Ms. K, and it is expensive. She agrees to try the splint and the exercises, and you schedule a follow-up visit in 6 weeks.

A look at alternative therapies
There are many nontraditional treatments for CTS, with yoga, carpal bone mobilization, ergonomic keyboards, and ultrasound therapy among them. Some have limited evidence to suggest that they may have a therapeutic effect;³⁰ others have little or no evidence to support them.

Yoga. Stretching and improved joint posture with specific yoga exercises may lead to decreased compression within the carpal tunnel and increased blood flow to the median nerve. One small study found that yoga was more effective than nocturnal wrist splinting for pain relief, and had similar improvement for nocturnal symptoms and grip strength.³¹

Carpal bone mobilization. One small study found this physical therapy technique, which involves movement of the bones in the wrist, to improve symptoms such as numbness and tingling after 3 weeks of therapy. Yet carpal bone mobilization did not relieve pain or help restore function.³²

Ergonomic keyboard. Patients who use computers at work may find that an ergonomic keyboard helps to relieve pain associated with CTS, compared with a standard keyboard.³³

Therapeutic ultrasound. A recent meta-analysis found that there is only poor-quality evidence for ultrasound as an effective treatment for CTS—a process in which a round-headed instrument applied to the skin delivers sound waves that are absorbed by underlying tissues in the carpal tunnel. And there is insufficient evidence for one type of ultrasound over another, or to suggest that ultrasound is more effective than other nonsurgical treatments.³⁴ Notably, ultrasound takes several weeks to provide a therapeutic benefit.

What about acupuncture? A recent trial found that acupuncture was no more effective than sham acupuncture in relieving symptoms of CTS in patients wearing wrist splints.³⁵ Magnet therapy, chiropractic, and cold laser therapy are not supported by evidence either.²⁸

Is the patient a candidate for surgery?

Carpal tunnel release provides good long-term outcomes for 70% to 90% of patients and is a cost-effective treatment.^36,37 Evidence supports a trial of conservative therapy, however, before considering surgery for patients with mild-to-moderate CTS.²² Future studies are needed to identify prognostic characteristics of patients most likely to respond to each type of intervention, and the optimal timing for surgical release.

Patients with severe CTS—with findings such as thenar atrophy, diminished hand function, and median nerve denervation—should be referred for surgery without delay. This recommendation is based on expert opinion, however, as most clinical trials comparing surgical vs nonsurgical treatment exclude those with severe CTS.³⁸

3 surgical techniques, and a novel approach
Surgical techniques include open, endoscopic, and minimal incision carpal tunnel release, with benefits and drawbacks for each. Compared with open release, for example, patients who undergo endoscopic release have less postoperative pain at 12 weeks, quicker return to work, and fewer wound complications, but are more likely to require surgical revision. And minimal incision release is associated with improved symptoms and function compared with open release.³⁸ However, there is no long-term evidence that any one of these 3 surgical approaches is more effective than another.³⁹

Percutaneous carpal tunnel release is a novel approach that may be offered in outpatient settings, with local anesthesia and ultrasound guidance to avoid median nerve damage.⁴⁰ Because studies of the safety and efficacy of percutaneous carpal tunnel release are limited, however, this approach is considered experimental.⁴¹ Percutaneous release is not a treatment recommended by the AAOS.³⁸

What to tell patients about postop care
Regardless of the method used for carpal tunnel release, most complications are minor—eg, a painful or hypertrophic scar, stiffness, swelling, and pain or tenderness on either side of the incision—and resolve within a few months.⁴² Advise patients not to continue to wear a wrist splint after surgery; doing so can cause stiffness or adhesions and may compromise surgical outcomes.⁴¹ Postoperatively, patients should be instructed to do nerve gliding exercises and to massage their scars, both of which they can safely do at home.⁴³

Patients can expect significant symptomatic improvement within 1 week of surgery, and most will be able to return to normal activities in 2 weeks.⁴⁴ Those with severe CTS should be warned, however, that it could take up to a year to determine the extent of recovery.²² Evidence suggests that from 3% to 19% of patients may have persistent or recurrent symptoms even after carpal tunnel release, with up to 12% requiring surgical revision.⁴⁵

CASE When Ms. K returns, she reports that while there has been some improvement, some activities—such as driving long distances and talking on the phone—still cause numbness and tingling. And, if she doesn’t wear the splint at night, she awakens with tingling in her hands. You discuss 2 options—continued conservative treatment with a local steroid injection, or EDS and surgical referral. The patient opts for the injection and continued use of the nocturnal wrist splint and exercises. When she returns in another 6 weeks, Ms. K reports significant improvement. You agree to stop the wrist splint and exercises and advise her to follow-up on an as-needed basis if the symptoms return.

CORRESPONDENCE Jennifer Wipperman, MD, MPH, Via Christi Family Medicine, 1121 S. Clifton, Wichita, KS 67218; [email protected]