American Academy of Neurology (AAN): Annual Meeting

BOSTON—Misdiagnosing optic neuritis may expose patients to risks associated with undergoing MRI with a contrast agent, lumbar puncture, and high-dose steroid treatment. It also costs patients and hospitals time and money. Leanne Stunkel, MD, a neurology resident at Washington University in St. Louis, and her colleagues observed a 60% misdiagnosis rate of optic neuritis among patients who were referred to their neuro-ophthalmology clinic, according to a study presented at the 69th Annual Meeting of the American Academy of Neurology.

“The most common [diagnostic] errors were overreliance on a single item of history and failure to consider alternative diagnoses,” said Dr. Stunkel.

Optic neuritis is an acute inflammatory demyelinating condition of the optic nerve. Presenting symptoms include acute or subacute vision loss, pain with eye movement, and changes in color vision, especially affecting the color red, said Dr. Stunkel. Many patients who were referred to their tertiary care clinic for optic neuritis turned out to have other conditions, which prompted the researchers to find out more about optic neuritis misdiagnosis.

Previous studies found a misdiagnosis rate of between 10% and 40%, but none of these studies examined which errors led to these misdiagnoses. To determine how often optic neuritis is misdiagnosed and which diagnostic errors play a role, and to identify diagnoses commonly mistaken for optic neuritis, Dr. Stunkel and colleagues performed a retrospective chart review.

The researchers reviewed new patient encounters between January 2014 and October 2016 to identify patients referred with a diagnosis of optic neuritis. Experienced neuro-ophthalmologists determined the final diagnosis. The researchers then applied the Diagnosis Error Evaluation and Research (DEER) taxonomy tool to identify diagnostic errors in cases in which the patient did not have optic neuritis.

A total of 122 patients were referred for optic neuritis during the study period. Only 40% of these patients were diagnosed with optic neuritis, and 60% of patients had alternative diagnoses. The most common alternative diagnoses were headache with eye pain and visual symptoms (22%), functional visual loss (19%), and other optic neuropathies (16%).

In addition, 15% of patients had retinal or macular problems rather than pathology of the optic nerve. Other diagnoses included neoplasms, congenital disk abnormalities, and inflammatory conditions that affected other parts of the eye.

The most common diagnostic errors were from problems eliciting or interpreting the history (33%). “We saw an overreliance on history of risk factors such as multiple sclerosis or other inflammatory disorders and some failure to elicit the fact that these were brief stereotyped episodes of vision loss, like in a migraine aura,” said Dr. Stunkel.

Twenty-one percent of diagnostic errors were due to errors interpreting physical exam findings, and 14% of errors were due to misinterpretation of diagnostic tests. Finally, 32% of diagnostic errors resulted from failure to consider alternative diagnoses. Of patients who did not have optic neuritis, 17% had already received a lumbar puncture, 17% had received a contrast MRI that turned out to be negative, and 11 patients had inappropriately received IV steroids, said Dr. Stunkel.

Some of the study limitations include that the DEER category assignments were subjective, and that not every referral for optic neuritis was included in the study due to limitations of the clinic’s electronic medical records system, said Dr. Stunkel.

—Erica Tricarico

BOSTON—Misdiagnosing optic neuritis may expose patients to risks associated with undergoing MRI with a contrast agent, lumbar puncture, and high-dose steroid treatment. It also costs patients and hospitals time and money. Leanne Stunkel, MD, a neurology resident at Washington University in St. Louis, and her colleagues observed a 60% misdiagnosis rate of optic neuritis among patients who were referred to their neuro-ophthalmology clinic, according to a study presented at the 69th Annual Meeting of the American Academy of Neurology.

“The most common [diagnostic] errors were overreliance on a single item of history and failure to consider alternative diagnoses,” said Dr. Stunkel.

Optic neuritis is an acute inflammatory demyelinating condition of the optic nerve. Presenting symptoms include acute or subacute vision loss, pain with eye movement, and changes in color vision, especially affecting the color red, said Dr. Stunkel. Many patients who were referred to their tertiary care clinic for optic neuritis turned out to have other conditions, which prompted the researchers to find out more about optic neuritis misdiagnosis.

Previous studies found a misdiagnosis rate of between 10% and 40%, but none of these studies examined which errors led to these misdiagnoses. To determine how often optic neuritis is misdiagnosed and which diagnostic errors play a role, and to identify diagnoses commonly mistaken for optic neuritis, Dr. Stunkel and colleagues performed a retrospective chart review.

The researchers reviewed new patient encounters between January 2014 and October 2016 to identify patients referred with a diagnosis of optic neuritis. Experienced neuro-ophthalmologists determined the final diagnosis. The researchers then applied the Diagnosis Error Evaluation and Research (DEER) taxonomy tool to identify diagnostic errors in cases in which the patient did not have optic neuritis.

A total of 122 patients were referred for optic neuritis during the study period. Only 40% of these patients were diagnosed with optic neuritis, and 60% of patients had alternative diagnoses. The most common alternative diagnoses were headache with eye pain and visual symptoms (22%), functional visual loss (19%), and other optic neuropathies (16%).

In addition, 15% of patients had retinal or macular problems rather than pathology of the optic nerve. Other diagnoses included neoplasms, congenital disk abnormalities, and inflammatory conditions that affected other parts of the eye.

The most common diagnostic errors were from problems eliciting or interpreting the history (33%). “We saw an overreliance on history of risk factors such as multiple sclerosis or other inflammatory disorders and some failure to elicit the fact that these were brief stereotyped episodes of vision loss, like in a migraine aura,” said Dr. Stunkel.

Twenty-one percent of diagnostic errors were due to errors interpreting physical exam findings, and 14% of errors were due to misinterpretation of diagnostic tests. Finally, 32% of diagnostic errors resulted from failure to consider alternative diagnoses. Of patients who did not have optic neuritis, 17% had already received a lumbar puncture, 17% had received a contrast MRI that turned out to be negative, and 11 patients had inappropriately received IV steroids, said Dr. Stunkel.

Some of the study limitations include that the DEER category assignments were subjective, and that not every referral for optic neuritis was included in the study due to limitations of the clinic’s electronic medical records system, said Dr. Stunkel.

—Erica Tricarico

BOSTON—Misdiagnosing optic neuritis may expose patients to risks associated with undergoing MRI with a contrast agent, lumbar puncture, and high-dose steroid treatment. It also costs patients and hospitals time and money. Leanne Stunkel, MD, a neurology resident at Washington University in St. Louis, and her colleagues observed a 60% misdiagnosis rate of optic neuritis among patients who were referred to their neuro-ophthalmology clinic, according to a study presented at the 69th Annual Meeting of the American Academy of Neurology.

“The most common [diagnostic] errors were overreliance on a single item of history and failure to consider alternative diagnoses,” said Dr. Stunkel.

Optic neuritis is an acute inflammatory demyelinating condition of the optic nerve. Presenting symptoms include acute or subacute vision loss, pain with eye movement, and changes in color vision, especially affecting the color red, said Dr. Stunkel. Many patients who were referred to their tertiary care clinic for optic neuritis turned out to have other conditions, which prompted the researchers to find out more about optic neuritis misdiagnosis.

Previous studies found a misdiagnosis rate of between 10% and 40%, but none of these studies examined which errors led to these misdiagnoses. To determine how often optic neuritis is misdiagnosed and which diagnostic errors play a role, and to identify diagnoses commonly mistaken for optic neuritis, Dr. Stunkel and colleagues performed a retrospective chart review.

The researchers reviewed new patient encounters between January 2014 and October 2016 to identify patients referred with a diagnosis of optic neuritis. Experienced neuro-ophthalmologists determined the final diagnosis. The researchers then applied the Diagnosis Error Evaluation and Research (DEER) taxonomy tool to identify diagnostic errors in cases in which the patient did not have optic neuritis.

A total of 122 patients were referred for optic neuritis during the study period. Only 40% of these patients were diagnosed with optic neuritis, and 60% of patients had alternative diagnoses. The most common alternative diagnoses were headache with eye pain and visual symptoms (22%), functional visual loss (19%), and other optic neuropathies (16%).

In addition, 15% of patients had retinal or macular problems rather than pathology of the optic nerve. Other diagnoses included neoplasms, congenital disk abnormalities, and inflammatory conditions that affected other parts of the eye.

The most common diagnostic errors were from problems eliciting or interpreting the history (33%). “We saw an overreliance on history of risk factors such as multiple sclerosis or other inflammatory disorders and some failure to elicit the fact that these were brief stereotyped episodes of vision loss, like in a migraine aura,” said Dr. Stunkel.

Twenty-one percent of diagnostic errors were due to errors interpreting physical exam findings, and 14% of errors were due to misinterpretation of diagnostic tests. Finally, 32% of diagnostic errors resulted from failure to consider alternative diagnoses. Of patients who did not have optic neuritis, 17% had already received a lumbar puncture, 17% had received a contrast MRI that turned out to be negative, and 11 patients had inappropriately received IV steroids, said Dr. Stunkel.

Some of the study limitations include that the DEER category assignments were subjective, and that not every referral for optic neuritis was included in the study due to limitations of the clinic’s electronic medical records system, said Dr. Stunkel.

—Erica Tricarico

BOSTON – A new analysis finds that some of the biggest neurologist prescribers of repository corticotropin gel (Acthar) – the extraordinarily expensive multiple sclerosis (MS) relapse drug – reaped extensive payments from its manufacturer, with one taking in $130,307 in a single year.

Together, 51 neurologists accounted for 980 Medicare claims worth more than $39 million in Acthar spending in 2014, almost half of the entire estimated $83 million in Medicare spending on neurologist-prescribed Acthar that year.

“There is a small group of neurologists – less than 1% – who are prescribing Acthar at considerable cost to Medicare and may do this in part because of financial relationships with the company that sells Acthar,” said study lead author Dennis Bourdette, MD, chair and research professor of neurology at Oregon Health and Science University, Portland.

BOSTON – A new analysis finds that some of the biggest neurologist prescribers of repository corticotropin gel (Acthar) – the extraordinarily expensive multiple sclerosis (MS) relapse drug – reaped extensive payments from its manufacturer, with one taking in $130,307 in a single year.

Together, 51 neurologists accounted for 980 Medicare claims worth more than $39 million in Acthar spending in 2014, almost half of the entire estimated $83 million in Medicare spending on neurologist-prescribed Acthar that year.

“There is a small group of neurologists – less than 1% – who are prescribing Acthar at considerable cost to Medicare and may do this in part because of financial relationships with the company that sells Acthar,” said study lead author Dennis Bourdette, MD, chair and research professor of neurology at Oregon Health and Science University, Portland.

BOSTON – A new analysis finds that some of the biggest neurologist prescribers of repository corticotropin gel (Acthar) – the extraordinarily expensive multiple sclerosis (MS) relapse drug – reaped extensive payments from its manufacturer, with one taking in $130,307 in a single year.

Together, 51 neurologists accounted for 980 Medicare claims worth more than $39 million in Acthar spending in 2014, almost half of the entire estimated $83 million in Medicare spending on neurologist-prescribed Acthar that year.

“There is a small group of neurologists – less than 1% – who are prescribing Acthar at considerable cost to Medicare and may do this in part because of financial relationships with the company that sells Acthar,” said study lead author Dennis Bourdette, MD, chair and research professor of neurology at Oregon Health and Science University, Portland.

BOSTON – A new study estimates that 3.4%-6.7% of amyotrophic lateral sclerosis (ALS) patients in Washington state sought to commit physician-assisted suicide over a 5-year period.

The rate is many times higher than that among cancer patients in the state, researchers found. They also discovered that ALS patients were significantly more likely than were other terminally ill people to use the deadly medication after getting prescriptions for it.

The findings appear to reflect the unique hopelessness facing ALS patients. “They’re not afforded as much denial of decline and death as are patients with other terminal illnesses,” said Linda Ganzini, MD, MPH, a professor of psychiatry and medicine at Oregon Health & Science University, Portland, who has studied end of life in ALS patients.

“Many cancer patients, even in the final days of life, receive treatments that they hope will extend their lives,” she said in an interview after reviewing the study findings. “In contrast, treatments for ALS are minimally effective.”

Physician-assisted suicide is legal in California, Colorado, the District of Columbia, Montana, Oregon, Vermont, and Washington.

A team led by Leo H. Wang, MD, PhD, of the University of Washington, Seattle, examined the medical records of 39 ALS patients who sought medication to end their lives at three hospitals in Seattle from March 2009 to Dec. 31, 2014.

Washington’s Death with Dignity (DWD) law, which went into effect in 2009, allows physicians to prescribe lethal medication if the patient has a terminal illness and a prognosis of less than 6 months to live as judged by two physicians.

The researchers reported their findings, a follow-up to a previous study (Neurology. 2016 Nov 15;87[20]:2117-22), at the annual meeting of the American Academy of Neurology.

The median age of the ALS patients at symptom onset was 64 (range, 42-83), and a median of 712 days passed (range, 207-2,407) from the date of diagnosis to date of prescription for lethal medication.

The median time from prescription to death was 22 days, with at least one patient dying immediately (range, 0-386 days). All 39 patients had limb involvement, and 82%-92% had bulbar involvement, dysarthria, dysphagia, and/or dyspnea.

The researchers estimate that 3.4%-6.7% of 1,146 ALS patients in Washington who died over the time period of the study sought a physician-assisted death. The 3.4% figure assumes that the 39 patients at the three hospitals make up all the ALS patients who received medication prescriptions. The 6.7% figure assumes that all patients with neurodegenerative disease who sought DWD in the state over that period had ALS.

“Similarly, 5% (92 of 1,795) of Oregon ALS patient who died sought medication under DWD between 1998 and 2014,” Dr. Wang said. “This is slightly increased compared to the percentage during the first decade, following enactment of the Oregon law (1998-2007), when 2.7% (26 of 962) of ALS patients died using DWD medication.”

Using Washington state data, researchers also estimated that 0.6% of 73,319 cancer patients and 0.2% of 298,178 people in the state who died of all causes sought DWD over the study period.

A total of 30 (77%) ALS patients who received the deadly prescriptions chose to take them, compared with 67% of all-cause patients who took advantage of the DWD law and 60% of cancer patients.

All 30 patients died. The nine who chose to not take the prescribed medication died after a median of 76 days. The patients who did not take the medication were more likely to be married (88% vs. 69%), to be college educated (100% vs. 74%), and to use a motorized wheelchair (78% vs. 31%).

Those who chose to not take the prescribed medication were also less motivated by loss of dignity (63% vs. 93% among those who took the medication) and by being a burden on others (25% vs. 66%). They were more likely to identify themselves as religious (80% vs. 35%).

Multiple factors may explain why ALS patients made different choices regarding the deadly drugs, lead study author Dr. Wang said in an interview. “We thought that the loss of communication may have played a role based on our finding, as most patients who followed through had more substantial trouble speaking,” he said. “For the patients who ultimately did not choose to take the medication, we found more of them had stronger religious beliefs than those who did not.”

As for pain, he reported that it was not a major issue. “Only about 10% of ALS patients were worried about pain, as opposed to 30% of the general Death with Dignity patients,” he said.

Dr. Ganzini noted that some patients who seek the prescribed drugs “want reassurance that, if their quality of life becomes unbearable, they have the option of physician-assisted death. But, they continue to cope and find reasons to live. As such, they ultimately die of their disease without taking the medications. Others lose the ability to ingest the medications, often because of sudden worsening of their disease.”

[email protected]

BOSTON – A new study estimates that 3.4%-6.7% of amyotrophic lateral sclerosis (ALS) patients in Washington state sought to commit physician-assisted suicide over a 5-year period.

The rate is many times higher than that among cancer patients in the state, researchers found. They also discovered that ALS patients were significantly more likely than were other terminally ill people to use the deadly medication after getting prescriptions for it.

The findings appear to reflect the unique hopelessness facing ALS patients. “They’re not afforded as much denial of decline and death as are patients with other terminal illnesses,” said Linda Ganzini, MD, MPH, a professor of psychiatry and medicine at Oregon Health & Science University, Portland, who has studied end of life in ALS patients.

“Many cancer patients, even in the final days of life, receive treatments that they hope will extend their lives,” she said in an interview after reviewing the study findings. “In contrast, treatments for ALS are minimally effective.”

Physician-assisted suicide is legal in California, Colorado, the District of Columbia, Montana, Oregon, Vermont, and Washington.

A team led by Leo H. Wang, MD, PhD, of the University of Washington, Seattle, examined the medical records of 39 ALS patients who sought medication to end their lives at three hospitals in Seattle from March 2009 to Dec. 31, 2014.

Washington’s Death with Dignity (DWD) law, which went into effect in 2009, allows physicians to prescribe lethal medication if the patient has a terminal illness and a prognosis of less than 6 months to live as judged by two physicians.

The researchers reported their findings, a follow-up to a previous study (Neurology. 2016 Nov 15;87[20]:2117-22), at the annual meeting of the American Academy of Neurology.

The median age of the ALS patients at symptom onset was 64 (range, 42-83), and a median of 712 days passed (range, 207-2,407) from the date of diagnosis to date of prescription for lethal medication.

The median time from prescription to death was 22 days, with at least one patient dying immediately (range, 0-386 days). All 39 patients had limb involvement, and 82%-92% had bulbar involvement, dysarthria, dysphagia, and/or dyspnea.

The researchers estimate that 3.4%-6.7% of 1,146 ALS patients in Washington who died over the time period of the study sought a physician-assisted death. The 3.4% figure assumes that the 39 patients at the three hospitals make up all the ALS patients who received medication prescriptions. The 6.7% figure assumes that all patients with neurodegenerative disease who sought DWD in the state over that period had ALS.

“Similarly, 5% (92 of 1,795) of Oregon ALS patient who died sought medication under DWD between 1998 and 2014,” Dr. Wang said. “This is slightly increased compared to the percentage during the first decade, following enactment of the Oregon law (1998-2007), when 2.7% (26 of 962) of ALS patients died using DWD medication.”

Using Washington state data, researchers also estimated that 0.6% of 73,319 cancer patients and 0.2% of 298,178 people in the state who died of all causes sought DWD over the study period.

A total of 30 (77%) ALS patients who received the deadly prescriptions chose to take them, compared with 67% of all-cause patients who took advantage of the DWD law and 60% of cancer patients.

All 30 patients died. The nine who chose to not take the prescribed medication died after a median of 76 days. The patients who did not take the medication were more likely to be married (88% vs. 69%), to be college educated (100% vs. 74%), and to use a motorized wheelchair (78% vs. 31%).

Those who chose to not take the prescribed medication were also less motivated by loss of dignity (63% vs. 93% among those who took the medication) and by being a burden on others (25% vs. 66%). They were more likely to identify themselves as religious (80% vs. 35%).

Multiple factors may explain why ALS patients made different choices regarding the deadly drugs, lead study author Dr. Wang said in an interview. “We thought that the loss of communication may have played a role based on our finding, as most patients who followed through had more substantial trouble speaking,” he said. “For the patients who ultimately did not choose to take the medication, we found more of them had stronger religious beliefs than those who did not.”

As for pain, he reported that it was not a major issue. “Only about 10% of ALS patients were worried about pain, as opposed to 30% of the general Death with Dignity patients,” he said.

Dr. Ganzini noted that some patients who seek the prescribed drugs “want reassurance that, if their quality of life becomes unbearable, they have the option of physician-assisted death. But, they continue to cope and find reasons to live. As such, they ultimately die of their disease without taking the medications. Others lose the ability to ingest the medications, often because of sudden worsening of their disease.”

[email protected]

BOSTON – A new study estimates that 3.4%-6.7% of amyotrophic lateral sclerosis (ALS) patients in Washington state sought to commit physician-assisted suicide over a 5-year period.

The rate is many times higher than that among cancer patients in the state, researchers found. They also discovered that ALS patients were significantly more likely than were other terminally ill people to use the deadly medication after getting prescriptions for it.

The findings appear to reflect the unique hopelessness facing ALS patients. “They’re not afforded as much denial of decline and death as are patients with other terminal illnesses,” said Linda Ganzini, MD, MPH, a professor of psychiatry and medicine at Oregon Health & Science University, Portland, who has studied end of life in ALS patients.

“Many cancer patients, even in the final days of life, receive treatments that they hope will extend their lives,” she said in an interview after reviewing the study findings. “In contrast, treatments for ALS are minimally effective.”

Physician-assisted suicide is legal in California, Colorado, the District of Columbia, Montana, Oregon, Vermont, and Washington.

A team led by Leo H. Wang, MD, PhD, of the University of Washington, Seattle, examined the medical records of 39 ALS patients who sought medication to end their lives at three hospitals in Seattle from March 2009 to Dec. 31, 2014.

Washington’s Death with Dignity (DWD) law, which went into effect in 2009, allows physicians to prescribe lethal medication if the patient has a terminal illness and a prognosis of less than 6 months to live as judged by two physicians.

The researchers reported their findings, a follow-up to a previous study (Neurology. 2016 Nov 15;87[20]:2117-22), at the annual meeting of the American Academy of Neurology.

The median age of the ALS patients at symptom onset was 64 (range, 42-83), and a median of 712 days passed (range, 207-2,407) from the date of diagnosis to date of prescription for lethal medication.

The median time from prescription to death was 22 days, with at least one patient dying immediately (range, 0-386 days). All 39 patients had limb involvement, and 82%-92% had bulbar involvement, dysarthria, dysphagia, and/or dyspnea.

The researchers estimate that 3.4%-6.7% of 1,146 ALS patients in Washington who died over the time period of the study sought a physician-assisted death. The 3.4% figure assumes that the 39 patients at the three hospitals make up all the ALS patients who received medication prescriptions. The 6.7% figure assumes that all patients with neurodegenerative disease who sought DWD in the state over that period had ALS.

“Similarly, 5% (92 of 1,795) of Oregon ALS patient who died sought medication under DWD between 1998 and 2014,” Dr. Wang said. “This is slightly increased compared to the percentage during the first decade, following enactment of the Oregon law (1998-2007), when 2.7% (26 of 962) of ALS patients died using DWD medication.”

Using Washington state data, researchers also estimated that 0.6% of 73,319 cancer patients and 0.2% of 298,178 people in the state who died of all causes sought DWD over the study period.

A total of 30 (77%) ALS patients who received the deadly prescriptions chose to take them, compared with 67% of all-cause patients who took advantage of the DWD law and 60% of cancer patients.

All 30 patients died. The nine who chose to not take the prescribed medication died after a median of 76 days. The patients who did not take the medication were more likely to be married (88% vs. 69%), to be college educated (100% vs. 74%), and to use a motorized wheelchair (78% vs. 31%).

Those who chose to not take the prescribed medication were also less motivated by loss of dignity (63% vs. 93% among those who took the medication) and by being a burden on others (25% vs. 66%). They were more likely to identify themselves as religious (80% vs. 35%).

Multiple factors may explain why ALS patients made different choices regarding the deadly drugs, lead study author Dr. Wang said in an interview. “We thought that the loss of communication may have played a role based on our finding, as most patients who followed through had more substantial trouble speaking,” he said. “For the patients who ultimately did not choose to take the medication, we found more of them had stronger religious beliefs than those who did not.”

As for pain, he reported that it was not a major issue. “Only about 10% of ALS patients were worried about pain, as opposed to 30% of the general Death with Dignity patients,” he said.

Dr. Ganzini noted that some patients who seek the prescribed drugs “want reassurance that, if their quality of life becomes unbearable, they have the option of physician-assisted death. But, they continue to cope and find reasons to live. As such, they ultimately die of their disease without taking the medications. Others lose the ability to ingest the medications, often because of sudden worsening of their disease.”

[email protected]

BOSTON – Cannabidiol add-on treatment significantly reduces the frequency of drop seizures in patients with Lennox-Gastaut syndrome, according to findings from the randomized, double-blind, placebo-controlled GWPCARE4 and GWPCARE3 trials.

In GWPCARE4 – the first controlled trial of cannabidiol in Lennox-Gastaut syndrome (LGS) – 171 patients were randomized to receive either placebo or cannabidiol oral solution at a dose of 20 mg/kg per day for 14 weeks, including 2 weeks of titration and 12 weeks of maintenance therapy. The drop seizure frequency decreased by a median of 44% in the cannabidiol group vs. 22% in the placebo group. The difference between the groups was statistically significant and was apparent within the first 4 weeks of the maintenance period, Jacqueline French, MD, director of translational research and clinical trials in epilepsy at New York University Langone Medical Center reported at the annual meeting of the American Academy of Neurology.

Study participants had a mean age of 15 years, and 34% were aged 18 years or older. The median drop seizure frequency was 74 per month at baseline.

“That is a very high seizure burden,” Dr. French said, noting that the median total drop and non-drop seizure frequency was in the mid to high 100s. “So you can see that these children were very afflicted by seizures.”

Interestingly, there was a “very substantial drop” in non-drop seizures, as well, she said.

“And that’s really hard to demonstrate, so that’s impressive to me, at least,” she added.

Patients had taken a median of six antiepileptic drugs (AEDs) in their past and were taking a median of three AEDs in addition to the cannabidiol throughout the study period.

Adverse events were common, occurring in 86% of cannabidiol patients and 69% of placebo patients. The most common were diarrhea, somnolence, pyrexia, decreased appetite, and vomiting, but most were mild or moderate. Treatment-related serious adverse events were reported in nine cannabidiol patients and one placebo patient. All patients who completed the trial entered an open-label extension study, Dr. French said.

GWPCARE4 was followed by GWPCARE3, which compared both 20 mg/kg per day and 10 mg/kg per day doses of cannabidiol with placebo.

In that study, 225 patients with a mean age of 16 years (30% were aged 18 years or older) were randomized, and the median drop in seizure frequency was 42% with 20 mg/kg of cannabidiol and 37% with 10 mg/kg of cannabidiol versus 17% with placebo, Anup D. Patel, MD, reported at the meeting.

Approximately 40% and 36% of patients in the 20 mg/kg and 10 mg/kg groups, respectively, achieved the secondary outcome of a 50% or greater drop in seizure frequency, compared with 15% of placebo patients.

“Overall, 5 patients in the 20 mg/kg per day arm, 3 in the 10 [mg/kg per day arm], and 1 in the placebo arm achieved drop seizure freedom during the maintenance period of our study,” said Dr. Patel, a pediatric neurologist at Nationwide Children’s Hospital, Columbus, Ohio.

The median monthly drop seizure frequency at baseline was 80-87 in the three groups, and patients had previously failed a median of six to seven AEDs. They took a median of three AEDs during the study.

Adverse events occurred in 94% of patients in the 20-mg/kg cannabidiol group, 84% of those in the 10-mg/kg group, and 72% of placebo patients, and most were mild or moderate. The most common were somnolence and decreased appetite.

Treatment-related serious adverse events were reported in 5, 2, and 0 patients in the groups, respectively. Some elevations in transaminases were seen (in 11 patients in the 20-mg/kg dose group, and 2 in the 10-mg/kg dose group), but no patients met criteria for drug-induced liver injury with concurrent elevated bilirubin, and all cases resolved, Dr. Patel said.

Similar findings were noted in GWPCARE4, and both Dr. Patel and Dr. French noted that most patients with elevated transaminases were also taking valproic acid.

No deaths occurred in either GWPCARE4 or GWPCARE3.

“We feel both doses... produce significantly greater reductions in drop seizures as compared to placebo,” Dr. Patel said.

In an interview, he noted that the two cannabidiol doses were not compared directly to determine if the differences in response rates and adverse events were statistically significant, but said that the rates appeared comparable, and that the adverse event rates were high in all of the groups, reflecting a very sick patient population.

Of the 212 patients who completed GWPCARE3, 99% entered an open-label extension study.

Eligible patients in both trials were children and adults aged 2-55 years with a clinical diagnosis of LGS, at least two drop seizures (including tonic, atonic, and tonic-clonic seizures) each week at baseline, and documented failures on at least one AED.

Patients and caregivers in both trials were more likely to report improvement in overall condition among treated vs. placebo patients, as measured using the Subject/Caregiver Global Impression of Change scale.

The findings provide class 1 evidence that cannabidiol as add-on therapy in LGS is efficacious for reducing seizure frequency, and is generally well tolerated, Dr. French and Dr. Patel said.

Dr. French noted that enthusiasm for the trials was high, with many study sites reporting waiting lists for patient enrollment.

Some of the authors in each study have consulted for, conducted studies funded by, or received honoraria from GW Pharmaceuticals, which funded the GWPCARE4 and GWPCARE3 trials and manufacturers the oral cannabidiol solution. Several authors in each study were employees of GW Pharmaceuticals.

[email protected]

BOSTON – Cannabidiol add-on treatment significantly reduces the frequency of drop seizures in patients with Lennox-Gastaut syndrome, according to findings from the randomized, double-blind, placebo-controlled GWPCARE4 and GWPCARE3 trials.

In GWPCARE4 – the first controlled trial of cannabidiol in Lennox-Gastaut syndrome (LGS) – 171 patients were randomized to receive either placebo or cannabidiol oral solution at a dose of 20 mg/kg per day for 14 weeks, including 2 weeks of titration and 12 weeks of maintenance therapy. The drop seizure frequency decreased by a median of 44% in the cannabidiol group vs. 22% in the placebo group. The difference between the groups was statistically significant and was apparent within the first 4 weeks of the maintenance period, Jacqueline French, MD, director of translational research and clinical trials in epilepsy at New York University Langone Medical Center reported at the annual meeting of the American Academy of Neurology.

Study participants had a mean age of 15 years, and 34% were aged 18 years or older. The median drop seizure frequency was 74 per month at baseline.

“That is a very high seizure burden,” Dr. French said, noting that the median total drop and non-drop seizure frequency was in the mid to high 100s. “So you can see that these children were very afflicted by seizures.”

Interestingly, there was a “very substantial drop” in non-drop seizures, as well, she said.

“And that’s really hard to demonstrate, so that’s impressive to me, at least,” she added.

Patients had taken a median of six antiepileptic drugs (AEDs) in their past and were taking a median of three AEDs in addition to the cannabidiol throughout the study period.

Adverse events were common, occurring in 86% of cannabidiol patients and 69% of placebo patients. The most common were diarrhea, somnolence, pyrexia, decreased appetite, and vomiting, but most were mild or moderate. Treatment-related serious adverse events were reported in nine cannabidiol patients and one placebo patient. All patients who completed the trial entered an open-label extension study, Dr. French said.

GWPCARE4 was followed by GWPCARE3, which compared both 20 mg/kg per day and 10 mg/kg per day doses of cannabidiol with placebo.

In that study, 225 patients with a mean age of 16 years (30% were aged 18 years or older) were randomized, and the median drop in seizure frequency was 42% with 20 mg/kg of cannabidiol and 37% with 10 mg/kg of cannabidiol versus 17% with placebo, Anup D. Patel, MD, reported at the meeting.

Approximately 40% and 36% of patients in the 20 mg/kg and 10 mg/kg groups, respectively, achieved the secondary outcome of a 50% or greater drop in seizure frequency, compared with 15% of placebo patients.

“Overall, 5 patients in the 20 mg/kg per day arm, 3 in the 10 [mg/kg per day arm], and 1 in the placebo arm achieved drop seizure freedom during the maintenance period of our study,” said Dr. Patel, a pediatric neurologist at Nationwide Children’s Hospital, Columbus, Ohio.

The median monthly drop seizure frequency at baseline was 80-87 in the three groups, and patients had previously failed a median of six to seven AEDs. They took a median of three AEDs during the study.

Adverse events occurred in 94% of patients in the 20-mg/kg cannabidiol group, 84% of those in the 10-mg/kg group, and 72% of placebo patients, and most were mild or moderate. The most common were somnolence and decreased appetite.

Treatment-related serious adverse events were reported in 5, 2, and 0 patients in the groups, respectively. Some elevations in transaminases were seen (in 11 patients in the 20-mg/kg dose group, and 2 in the 10-mg/kg dose group), but no patients met criteria for drug-induced liver injury with concurrent elevated bilirubin, and all cases resolved, Dr. Patel said.

Similar findings were noted in GWPCARE4, and both Dr. Patel and Dr. French noted that most patients with elevated transaminases were also taking valproic acid.

No deaths occurred in either GWPCARE4 or GWPCARE3.

“We feel both doses... produce significantly greater reductions in drop seizures as compared to placebo,” Dr. Patel said.

In an interview, he noted that the two cannabidiol doses were not compared directly to determine if the differences in response rates and adverse events were statistically significant, but said that the rates appeared comparable, and that the adverse event rates were high in all of the groups, reflecting a very sick patient population.

Of the 212 patients who completed GWPCARE3, 99% entered an open-label extension study.

Eligible patients in both trials were children and adults aged 2-55 years with a clinical diagnosis of LGS, at least two drop seizures (including tonic, atonic, and tonic-clonic seizures) each week at baseline, and documented failures on at least one AED.

Patients and caregivers in both trials were more likely to report improvement in overall condition among treated vs. placebo patients, as measured using the Subject/Caregiver Global Impression of Change scale.

The findings provide class 1 evidence that cannabidiol as add-on therapy in LGS is efficacious for reducing seizure frequency, and is generally well tolerated, Dr. French and Dr. Patel said.

Dr. French noted that enthusiasm for the trials was high, with many study sites reporting waiting lists for patient enrollment.

Some of the authors in each study have consulted for, conducted studies funded by, or received honoraria from GW Pharmaceuticals, which funded the GWPCARE4 and GWPCARE3 trials and manufacturers the oral cannabidiol solution. Several authors in each study were employees of GW Pharmaceuticals.

[email protected]

BOSTON – Cannabidiol add-on treatment significantly reduces the frequency of drop seizures in patients with Lennox-Gastaut syndrome, according to findings from the randomized, double-blind, placebo-controlled GWPCARE4 and GWPCARE3 trials.

In GWPCARE4 – the first controlled trial of cannabidiol in Lennox-Gastaut syndrome (LGS) – 171 patients were randomized to receive either placebo or cannabidiol oral solution at a dose of 20 mg/kg per day for 14 weeks, including 2 weeks of titration and 12 weeks of maintenance therapy. The drop seizure frequency decreased by a median of 44% in the cannabidiol group vs. 22% in the placebo group. The difference between the groups was statistically significant and was apparent within the first 4 weeks of the maintenance period, Jacqueline French, MD, director of translational research and clinical trials in epilepsy at New York University Langone Medical Center reported at the annual meeting of the American Academy of Neurology.

Study participants had a mean age of 15 years, and 34% were aged 18 years or older. The median drop seizure frequency was 74 per month at baseline.

“That is a very high seizure burden,” Dr. French said, noting that the median total drop and non-drop seizure frequency was in the mid to high 100s. “So you can see that these children were very afflicted by seizures.”

Interestingly, there was a “very substantial drop” in non-drop seizures, as well, she said.

“And that’s really hard to demonstrate, so that’s impressive to me, at least,” she added.

Patients had taken a median of six antiepileptic drugs (AEDs) in their past and were taking a median of three AEDs in addition to the cannabidiol throughout the study period.

Adverse events were common, occurring in 86% of cannabidiol patients and 69% of placebo patients. The most common were diarrhea, somnolence, pyrexia, decreased appetite, and vomiting, but most were mild or moderate. Treatment-related serious adverse events were reported in nine cannabidiol patients and one placebo patient. All patients who completed the trial entered an open-label extension study, Dr. French said.

GWPCARE4 was followed by GWPCARE3, which compared both 20 mg/kg per day and 10 mg/kg per day doses of cannabidiol with placebo.

In that study, 225 patients with a mean age of 16 years (30% were aged 18 years or older) were randomized, and the median drop in seizure frequency was 42% with 20 mg/kg of cannabidiol and 37% with 10 mg/kg of cannabidiol versus 17% with placebo, Anup D. Patel, MD, reported at the meeting.

Approximately 40% and 36% of patients in the 20 mg/kg and 10 mg/kg groups, respectively, achieved the secondary outcome of a 50% or greater drop in seizure frequency, compared with 15% of placebo patients.

“Overall, 5 patients in the 20 mg/kg per day arm, 3 in the 10 [mg/kg per day arm], and 1 in the placebo arm achieved drop seizure freedom during the maintenance period of our study,” said Dr. Patel, a pediatric neurologist at Nationwide Children’s Hospital, Columbus, Ohio.

The median monthly drop seizure frequency at baseline was 80-87 in the three groups, and patients had previously failed a median of six to seven AEDs. They took a median of three AEDs during the study.

Adverse events occurred in 94% of patients in the 20-mg/kg cannabidiol group, 84% of those in the 10-mg/kg group, and 72% of placebo patients, and most were mild or moderate. The most common were somnolence and decreased appetite.

Treatment-related serious adverse events were reported in 5, 2, and 0 patients in the groups, respectively. Some elevations in transaminases were seen (in 11 patients in the 20-mg/kg dose group, and 2 in the 10-mg/kg dose group), but no patients met criteria for drug-induced liver injury with concurrent elevated bilirubin, and all cases resolved, Dr. Patel said.

Similar findings were noted in GWPCARE4, and both Dr. Patel and Dr. French noted that most patients with elevated transaminases were also taking valproic acid.

No deaths occurred in either GWPCARE4 or GWPCARE3.

“We feel both doses... produce significantly greater reductions in drop seizures as compared to placebo,” Dr. Patel said.

In an interview, he noted that the two cannabidiol doses were not compared directly to determine if the differences in response rates and adverse events were statistically significant, but said that the rates appeared comparable, and that the adverse event rates were high in all of the groups, reflecting a very sick patient population.

Of the 212 patients who completed GWPCARE3, 99% entered an open-label extension study.

Eligible patients in both trials were children and adults aged 2-55 years with a clinical diagnosis of LGS, at least two drop seizures (including tonic, atonic, and tonic-clonic seizures) each week at baseline, and documented failures on at least one AED.

Patients and caregivers in both trials were more likely to report improvement in overall condition among treated vs. placebo patients, as measured using the Subject/Caregiver Global Impression of Change scale.

The findings provide class 1 evidence that cannabidiol as add-on therapy in LGS is efficacious for reducing seizure frequency, and is generally well tolerated, Dr. French and Dr. Patel said.

Dr. French noted that enthusiasm for the trials was high, with many study sites reporting waiting lists for patient enrollment.

Some of the authors in each study have consulted for, conducted studies funded by, or received honoraria from GW Pharmaceuticals, which funded the GWPCARE4 and GWPCARE3 trials and manufacturers the oral cannabidiol solution. Several authors in each study were employees of GW Pharmaceuticals.

[email protected]

BOSTON—Compared with fixed dosing, dose titration appears to reduce the risk of amyloid-related imaging abnormalities (ARIA) associated with aducanumab, according to research presented at the 69th Annual Meeting of the American Academy of Neurology. The drug also may reduce the burden of amyloid plaques and slow cognitive decline.

Aducanumab is a human anti-amyloid beta monoclonal antibody under investigation for early Alzheimer’s disease. In an interim analysis of the PRIME study, dose- and APOE ε4-dependent ARIA of the edema type was the main safety and tolerability finding. Ahmed Enayetallah, MD, PhD, of Biogen, and colleagues investigated whether dose titration would reduce the incidence of ARIA, compared with fixed dosing.

In a double-blind, placebo-controlled study, the researchers randomized participants with prodromal or mild Alzheimer’s disease 3:1 to fixed doses of aducanumab or placebo every four weeks for 52 weeks, stratified by APOE ε4 status. After the enrollment of this cohort, the investigators added a cohort of APOE ε4 carriers who received titrated aducanumab or placebo. Patients assigned to aducanumab received two 1-mg/kg doses, four 3-mg/kg doses, five 6-mg/kg doses, and 10-mg/kg doses thereafter.

The trial’s primary end points were safety and tolerability. Exploratory efficacy end points included amyloid beta reduction by PET at one year, Clinical Dementia Rating–Sum of Boxes (CDR–SB), and Mini-Mental State Examination (MMSE).

A total of 196 patients were dosed in the study, and the titration cohort included 31 participants. The treatment groups were well balanced. Compared with placebo, titrated aducanumab was associated with significant decreases in brain amyloid beta at 12 months. The adjusted mean change from baseline in PET standard uptake value ratio was –0.171 versus 0.014, respectively. The difference was observable at week 26 and was maintained to week 54.

Titrated aducanumab also was associated with a slowing of clinical decline on CDR–SB and MMSE. Results in the titration cohort were generally consistent with those reported in fixed-dose cohorts. The incidence of ARIA was lower with titrated dosing versus higher fixed dosing of aducanumab in APOE ε4 carriers. The researchers did not find any new safety signals in the titration cohort during the placebo-controlled period.

Biogen funded the study.

Suggested Reading

Sevigny J, Chiao P, Bussière T, et al. The antibody aducanumab reduces Aβ plaques in Alzheimer’s disease. Nature. 2016;537(7618):50-56.

BOSTON—Compared with fixed dosing, dose titration appears to reduce the risk of amyloid-related imaging abnormalities (ARIA) associated with aducanumab, according to research presented at the 69th Annual Meeting of the American Academy of Neurology. The drug also may reduce the burden of amyloid plaques and slow cognitive decline.

Aducanumab is a human anti-amyloid beta monoclonal antibody under investigation for early Alzheimer’s disease. In an interim analysis of the PRIME study, dose- and APOE ε4-dependent ARIA of the edema type was the main safety and tolerability finding. Ahmed Enayetallah, MD, PhD, of Biogen, and colleagues investigated whether dose titration would reduce the incidence of ARIA, compared with fixed dosing.

In a double-blind, placebo-controlled study, the researchers randomized participants with prodromal or mild Alzheimer’s disease 3:1 to fixed doses of aducanumab or placebo every four weeks for 52 weeks, stratified by APOE ε4 status. After the enrollment of this cohort, the investigators added a cohort of APOE ε4 carriers who received titrated aducanumab or placebo. Patients assigned to aducanumab received two 1-mg/kg doses, four 3-mg/kg doses, five 6-mg/kg doses, and 10-mg/kg doses thereafter.

The trial’s primary end points were safety and tolerability. Exploratory efficacy end points included amyloid beta reduction by PET at one year, Clinical Dementia Rating–Sum of Boxes (CDR–SB), and Mini-Mental State Examination (MMSE).

A total of 196 patients were dosed in the study, and the titration cohort included 31 participants. The treatment groups were well balanced. Compared with placebo, titrated aducanumab was associated with significant decreases in brain amyloid beta at 12 months. The adjusted mean change from baseline in PET standard uptake value ratio was –0.171 versus 0.014, respectively. The difference was observable at week 26 and was maintained to week 54.

Titrated aducanumab also was associated with a slowing of clinical decline on CDR–SB and MMSE. Results in the titration cohort were generally consistent with those reported in fixed-dose cohorts. The incidence of ARIA was lower with titrated dosing versus higher fixed dosing of aducanumab in APOE ε4 carriers. The researchers did not find any new safety signals in the titration cohort during the placebo-controlled period.

Biogen funded the study.

Suggested Reading

Sevigny J, Chiao P, Bussière T, et al. The antibody aducanumab reduces Aβ plaques in Alzheimer’s disease. Nature. 2016;537(7618):50-56.

BOSTON—Compared with fixed dosing, dose titration appears to reduce the risk of amyloid-related imaging abnormalities (ARIA) associated with aducanumab, according to research presented at the 69th Annual Meeting of the American Academy of Neurology. The drug also may reduce the burden of amyloid plaques and slow cognitive decline.

Aducanumab is a human anti-amyloid beta monoclonal antibody under investigation for early Alzheimer’s disease. In an interim analysis of the PRIME study, dose- and APOE ε4-dependent ARIA of the edema type was the main safety and tolerability finding. Ahmed Enayetallah, MD, PhD, of Biogen, and colleagues investigated whether dose titration would reduce the incidence of ARIA, compared with fixed dosing.

In a double-blind, placebo-controlled study, the researchers randomized participants with prodromal or mild Alzheimer’s disease 3:1 to fixed doses of aducanumab or placebo every four weeks for 52 weeks, stratified by APOE ε4 status. After the enrollment of this cohort, the investigators added a cohort of APOE ε4 carriers who received titrated aducanumab or placebo. Patients assigned to aducanumab received two 1-mg/kg doses, four 3-mg/kg doses, five 6-mg/kg doses, and 10-mg/kg doses thereafter.

The trial’s primary end points were safety and tolerability. Exploratory efficacy end points included amyloid beta reduction by PET at one year, Clinical Dementia Rating–Sum of Boxes (CDR–SB), and Mini-Mental State Examination (MMSE).

A total of 196 patients were dosed in the study, and the titration cohort included 31 participants. The treatment groups were well balanced. Compared with placebo, titrated aducanumab was associated with significant decreases in brain amyloid beta at 12 months. The adjusted mean change from baseline in PET standard uptake value ratio was –0.171 versus 0.014, respectively. The difference was observable at week 26 and was maintained to week 54.

Titrated aducanumab also was associated with a slowing of clinical decline on CDR–SB and MMSE. Results in the titration cohort were generally consistent with those reported in fixed-dose cohorts. The incidence of ARIA was lower with titrated dosing versus higher fixed dosing of aducanumab in APOE ε4 carriers. The researchers did not find any new safety signals in the titration cohort during the placebo-controlled period.

Biogen funded the study.

Suggested Reading

Sevigny J, Chiao P, Bussière T, et al. The antibody aducanumab reduces Aβ plaques in Alzheimer’s disease. Nature. 2016;537(7618):50-56.

BOSTON – Adjunctive treatment with cannabidiol significantly reduced convulsive seizure frequency in Dravet syndrome patients in a randomized, double-blind, placebo-controlled trial.

Over a 14-week treatment period, including 2 weeks of titration and 12 weeks of maintenance, convulsive seizure frequency in 61 treated children and adolescents decreased from a median of 12.4 to 5.9 per month (median reduction of 39%), compared with a decrease from a median of 14.9 to 14.1 per month (median reduction of 13%) in 59 patients who received placebo, J. Helen Cross, MD, reported at the annual meeting of the American Academy of Neurology.

The proportion of patients with at least a 50% reduction in convulsive seizures was 42.6% with cannabidiol vs. 27.1% with placebo (odds ratio, 2.0), but this difference did not reach statistical significance, said Dr. Cross of the University College London Great Ormond Street Institute of Child Health and the Great Ormond Street Hospital for Children NHS Trust, London.

In a video interview, Dr. Cross discussed the findings and the importance of improving seizure control in patients with Dravet syndrome, a rare infantile-onset developmental and epileptic encephalopathy with very poor prognosis for long-term seizure control and neurodevelopmental outcomes.

Participants in the study (GWPCARE1) had a mean age of 10 years, but nearly a third were younger than 6 years. All had Dravet syndrome and drug-resistant seizures; the median number of antiepilepsy drugs previously tried was four, and the median number being used was three. Those randomized to the treatment group received cannabidiol oral solution up to 20 mg/kg per day.

Adverse events were common, occurring in 93.4% and 74.6% of treatment group and placebo group patients, respectively. But adverse events reported in the treatment group were mild or moderate in 84% of patients, and treatment was generally well tolerated.

“These are very complex patients with a high seizure burden... and therefore, to have another medication that looks as if it can be of benefit is really very exciting for this population,” Dr. Cross said, noting that cannabidiol was also shown in other studies presented at the AAN meeting (GWPCARE3 and GWPCARE4) to reduce seizure frequency in patients with Lennox-Gastaut syndrome.

GW Research sponsored the study. Dr. Cross is a member of the advisory boards for Eisai, GW Pharmaceuticals, Shire, and Zogenix.

[email protected]

BOSTON – Adjunctive treatment with cannabidiol significantly reduced convulsive seizure frequency in Dravet syndrome patients in a randomized, double-blind, placebo-controlled trial.

Over a 14-week treatment period, including 2 weeks of titration and 12 weeks of maintenance, convulsive seizure frequency in 61 treated children and adolescents decreased from a median of 12.4 to 5.9 per month (median reduction of 39%), compared with a decrease from a median of 14.9 to 14.1 per month (median reduction of 13%) in 59 patients who received placebo, J. Helen Cross, MD, reported at the annual meeting of the American Academy of Neurology.

The proportion of patients with at least a 50% reduction in convulsive seizures was 42.6% with cannabidiol vs. 27.1% with placebo (odds ratio, 2.0), but this difference did not reach statistical significance, said Dr. Cross of the University College London Great Ormond Street Institute of Child Health and the Great Ormond Street Hospital for Children NHS Trust, London.

In a video interview, Dr. Cross discussed the findings and the importance of improving seizure control in patients with Dravet syndrome, a rare infantile-onset developmental and epileptic encephalopathy with very poor prognosis for long-term seizure control and neurodevelopmental outcomes.

Participants in the study (GWPCARE1) had a mean age of 10 years, but nearly a third were younger than 6 years. All had Dravet syndrome and drug-resistant seizures; the median number of antiepilepsy drugs previously tried was four, and the median number being used was three. Those randomized to the treatment group received cannabidiol oral solution up to 20 mg/kg per day.

Adverse events were common, occurring in 93.4% and 74.6% of treatment group and placebo group patients, respectively. But adverse events reported in the treatment group were mild or moderate in 84% of patients, and treatment was generally well tolerated.

“These are very complex patients with a high seizure burden... and therefore, to have another medication that looks as if it can be of benefit is really very exciting for this population,” Dr. Cross said, noting that cannabidiol was also shown in other studies presented at the AAN meeting (GWPCARE3 and GWPCARE4) to reduce seizure frequency in patients with Lennox-Gastaut syndrome.

GW Research sponsored the study. Dr. Cross is a member of the advisory boards for Eisai, GW Pharmaceuticals, Shire, and Zogenix.

[email protected]

BOSTON – Adjunctive treatment with cannabidiol significantly reduced convulsive seizure frequency in Dravet syndrome patients in a randomized, double-blind, placebo-controlled trial.

Over a 14-week treatment period, including 2 weeks of titration and 12 weeks of maintenance, convulsive seizure frequency in 61 treated children and adolescents decreased from a median of 12.4 to 5.9 per month (median reduction of 39%), compared with a decrease from a median of 14.9 to 14.1 per month (median reduction of 13%) in 59 patients who received placebo, J. Helen Cross, MD, reported at the annual meeting of the American Academy of Neurology.

The proportion of patients with at least a 50% reduction in convulsive seizures was 42.6% with cannabidiol vs. 27.1% with placebo (odds ratio, 2.0), but this difference did not reach statistical significance, said Dr. Cross of the University College London Great Ormond Street Institute of Child Health and the Great Ormond Street Hospital for Children NHS Trust, London.

In a video interview, Dr. Cross discussed the findings and the importance of improving seizure control in patients with Dravet syndrome, a rare infantile-onset developmental and epileptic encephalopathy with very poor prognosis for long-term seizure control and neurodevelopmental outcomes.

Participants in the study (GWPCARE1) had a mean age of 10 years, but nearly a third were younger than 6 years. All had Dravet syndrome and drug-resistant seizures; the median number of antiepilepsy drugs previously tried was four, and the median number being used was three. Those randomized to the treatment group received cannabidiol oral solution up to 20 mg/kg per day.

Adverse events were common, occurring in 93.4% and 74.6% of treatment group and placebo group patients, respectively. But adverse events reported in the treatment group were mild or moderate in 84% of patients, and treatment was generally well tolerated.

“These are very complex patients with a high seizure burden... and therefore, to have another medication that looks as if it can be of benefit is really very exciting for this population,” Dr. Cross said, noting that cannabidiol was also shown in other studies presented at the AAN meeting (GWPCARE3 and GWPCARE4) to reduce seizure frequency in patients with Lennox-Gastaut syndrome.

GW Research sponsored the study. Dr. Cross is a member of the advisory boards for Eisai, GW Pharmaceuticals, Shire, and Zogenix.

[email protected]

BOSTON – Children with multiple sclerosis (MS) and related conditions are as much as 10 times more likely than the general population to need to be hospitalized for various psychiatric conditions, a study showed.

“The true prevalence of morbidity is almost certainly higher than suggested by our data,” said study lead author Julia Pakpoor, BM BCh, who presented data from her research at the annual meeting of the American Academy of Neurology.

While several studies have examined links between MS and mental illness in adults, there’s been little research into the topic in children. The number of children with the disease is far from tiny, however. According to the National MS Society, an estimated 8,000-10,000 children have the condition in the United States.

SIphotography/Thinkstock

[email protected]

BOSTON – Children with multiple sclerosis (MS) and related conditions are as much as 10 times more likely than the general population to need to be hospitalized for various psychiatric conditions, a study showed.

“The true prevalence of morbidity is almost certainly higher than suggested by our data,” said study lead author Julia Pakpoor, BM BCh, who presented data from her research at the annual meeting of the American Academy of Neurology.

While several studies have examined links between MS and mental illness in adults, there’s been little research into the topic in children. The number of children with the disease is far from tiny, however. According to the National MS Society, an estimated 8,000-10,000 children have the condition in the United States.

SIphotography/Thinkstock

[email protected]

BOSTON – Children with multiple sclerosis (MS) and related conditions are as much as 10 times more likely than the general population to need to be hospitalized for various psychiatric conditions, a study showed.

“The true prevalence of morbidity is almost certainly higher than suggested by our data,” said study lead author Julia Pakpoor, BM BCh, who presented data from her research at the annual meeting of the American Academy of Neurology.

While several studies have examined links between MS and mental illness in adults, there’s been little research into the topic in children. The number of children with the disease is far from tiny, however. According to the National MS Society, an estimated 8,000-10,000 children have the condition in the United States.

SIphotography/Thinkstock

[email protected]

BOSTON – Some of the most influential clinical research reports coming out of the annual meeting of the American Academy of Neurology raise questions on how neurologists will strike a balance between the improved efficacy and safety of drugs in new therapeutic classes and their affordability for patients.

Natalia Rost, MD, vice chair of the AAN Science Committee, discussed phase III clinical trials (ARISE and STRIVE) in episodic migraine with erenumab, an investigational humanized monoclonal antibody against calcitonin gene-related peptide receptor; phase III clinical trials (ENDEAR and CHERISH) of the antisense oligonucleotide drug nusinersen (Spinraza) that was approved by the Food and Drug Administration for spinal muscular atrophy in late 2016; as well as phase III trials of a pharmaceutical-grade extract of the cannabis-derived compound cannabidiol in patients with Dravet syndrome and Lennox-Gastaut syndrome.

Erenumab and nusinersen are “disease-specific targeted biologics” that have been developed over decades to target a specific disease pathway, and hence translate into high prices, Dr. Rost said in a video interview at the meeting.

“How you value the cost of a drug against improvement in a physiological outcome is very difficult to measure,” she noted, for relatively small gains in reducing migraine days per month and improvements in functional outcome and disability against placebo.

But this calculation is different with the potentially lifesaving effects of nusinersen for spinal muscular atrophy patients, in which “we’re not talking about days of improvement, we’re talking about days of life,” said Dr. Rost, director of acute stroke services at Massachusetts General Hospital, Boston. “And so that becomes an ethical dilemma in terms of the cost of administration, who is paying for the drug, and how this is covered. Whom do you offer treatment to?”

The development of cannabidiol as a potential adjunctive treatment for Dravet and Lennox-Gastaut syndromes is a welcome addition to the armamentarium against these conditions, Dr. Rost added, because it offers an alternative to the unregulated use of herbal medications and supplements – particularly cannabis in its various forms – that patients ask about but are difficult to dose consistently and to ensure a pharmaceutical-grade level of purity.

[email protected]

BOSTON – Some of the most influential clinical research reports coming out of the annual meeting of the American Academy of Neurology raise questions on how neurologists will strike a balance between the improved efficacy and safety of drugs in new therapeutic classes and their affordability for patients.

Natalia Rost, MD, vice chair of the AAN Science Committee, discussed phase III clinical trials (ARISE and STRIVE) in episodic migraine with erenumab, an investigational humanized monoclonal antibody against calcitonin gene-related peptide receptor; phase III clinical trials (ENDEAR and CHERISH) of the antisense oligonucleotide drug nusinersen (Spinraza) that was approved by the Food and Drug Administration for spinal muscular atrophy in late 2016; as well as phase III trials of a pharmaceutical-grade extract of the cannabis-derived compound cannabidiol in patients with Dravet syndrome and Lennox-Gastaut syndrome.

Erenumab and nusinersen are “disease-specific targeted biologics” that have been developed over decades to target a specific disease pathway, and hence translate into high prices, Dr. Rost said in a video interview at the meeting.

“How you value the cost of a drug against improvement in a physiological outcome is very difficult to measure,” she noted, for relatively small gains in reducing migraine days per month and improvements in functional outcome and disability against placebo.

But this calculation is different with the potentially lifesaving effects of nusinersen for spinal muscular atrophy patients, in which “we’re not talking about days of improvement, we’re talking about days of life,” said Dr. Rost, director of acute stroke services at Massachusetts General Hospital, Boston. “And so that becomes an ethical dilemma in terms of the cost of administration, who is paying for the drug, and how this is covered. Whom do you offer treatment to?”

The development of cannabidiol as a potential adjunctive treatment for Dravet and Lennox-Gastaut syndromes is a welcome addition to the armamentarium against these conditions, Dr. Rost added, because it offers an alternative to the unregulated use of herbal medications and supplements – particularly cannabis in its various forms – that patients ask about but are difficult to dose consistently and to ensure a pharmaceutical-grade level of purity.

[email protected]

BOSTON – Some of the most influential clinical research reports coming out of the annual meeting of the American Academy of Neurology raise questions on how neurologists will strike a balance between the improved efficacy and safety of drugs in new therapeutic classes and their affordability for patients.

Natalia Rost, MD, vice chair of the AAN Science Committee, discussed phase III clinical trials (ARISE and STRIVE) in episodic migraine with erenumab, an investigational humanized monoclonal antibody against calcitonin gene-related peptide receptor; phase III clinical trials (ENDEAR and CHERISH) of the antisense oligonucleotide drug nusinersen (Spinraza) that was approved by the Food and Drug Administration for spinal muscular atrophy in late 2016; as well as phase III trials of a pharmaceutical-grade extract of the cannabis-derived compound cannabidiol in patients with Dravet syndrome and Lennox-Gastaut syndrome.

Erenumab and nusinersen are “disease-specific targeted biologics” that have been developed over decades to target a specific disease pathway, and hence translate into high prices, Dr. Rost said in a video interview at the meeting.

“How you value the cost of a drug against improvement in a physiological outcome is very difficult to measure,” she noted, for relatively small gains in reducing migraine days per month and improvements in functional outcome and disability against placebo.

But this calculation is different with the potentially lifesaving effects of nusinersen for spinal muscular atrophy patients, in which “we’re not talking about days of improvement, we’re talking about days of life,” said Dr. Rost, director of acute stroke services at Massachusetts General Hospital, Boston. “And so that becomes an ethical dilemma in terms of the cost of administration, who is paying for the drug, and how this is covered. Whom do you offer treatment to?”

The development of cannabidiol as a potential adjunctive treatment for Dravet and Lennox-Gastaut syndromes is a welcome addition to the armamentarium against these conditions, Dr. Rost added, because it offers an alternative to the unregulated use of herbal medications and supplements – particularly cannabis in its various forms – that patients ask about but are difficult to dose consistently and to ensure a pharmaceutical-grade level of purity.

[email protected]

BOSTON – Intrathecal, autologous mesenchymal stem cell (MSC) treatment provided encouraging results for modifying the disease course of multiple system atrophy with relative safety and tolerability in a phase I/II trial.

The efficacy of MSCs on slowing multiple system atrophy (MSA) progression in a small trial of 24 patients appeared to be dependent on the dose, and, in the highest dose individuals, had a painful implantation response, trial investigator Wolfgang Singer, MD, reported at the annual meeting of the American Academy of Neurology.

Dr. Singer and his colleagues at the Mayo Clinic in Rochester, Minn., chose to investigate MSCs as a treatment because they are multipotent and capable of differentiating into different cell types, including glial cells, and they secrete neurotrophic factors, such as brain-derived neurotrophic factor and glial cell line-derived neurotrophic factor, which are thought to occur at pathologically low levels in individuals with MSA. The intrinsic immunomodulatory action of MSCs may also contribute to a potential benefit on neuroinflammatory aspects of MSA pathology.

MSCs have previously shown promising results on slowing disease progression in an open-label study of Korean patients with MSA, who received an intra-arterial infusion of MSCs into the internal carotids and dominant vertebral artery, followed by intravenous infusions (Clin Pharmacol Ther. 2008 May;83[5]:723-30). Those results were confirmed in a double-blind, placebo-controlled study (Ann Neurol. 2012 Jul;72[1]:32-40), but evidence of microemboli raised concerns with the Mayo Clinic team about stroke risk with the intra-arterial approach, Dr. Singer said.

The intrathecal route of administration also may be advantageous over an intra-arterial approach by reaching the targets of MSCs in the brain “in a more widespread fashion,” Dr. Singer said.

The relative safety and hint of efficacy with the different route of MSC administration in the Mayo Clinic study make it “a really groundbreaking direction to take,” session comoderator Christopher H. Gibbons, MD, said in an interview. “I think this a very good, small, but critical, step in demonstrating that ... you can do this, and maybe there’s a signal that it is, in fact, working at slowing down disease progression, which I think is incredibly important in this disease.”

In the current study, Dr. Singer and his associates intrathecally administered between 10 and 200 million autologous, fat-derived MSCs via lumbar puncture in predefined dose tiers and then followed patients over 1 year. Overall, 8 patients received a single dose of 10 million cells, 12 received a dose of 50 million cells followed by a second 50-million cell dose 4 weeks later, and 4 received a dose of 100 million cells followed by a second 100-million cell dose 4 weeks later.

The 24 patients in the study all met consensus criteria for probable MSA, had at least moderate laboratory evidence of autonomic failure, and were at an early stage of disease with a Unified MSA Rating Scale part 1 score of 18 or less.

In the primary outcome of safety, the investigators reported no treatment–attributable serious adverse events and said that the treatment was generally well-tolerated. All 16 patients who took either the high or medium doses had MRI abnormalities that showed thickening/enhancement of cauda equina nerve roots at the level of the puncture that were asymptomatic and did not lead to neurologic deficits.

The 12 medium-dose patients had variable elevation of cerebrospinal fluid protein and cell counts, and 5 had mild and transient low back pain. In the highest-dose tier, three of four patients developed low back pain, some of which was severe, and the same MRI findings, which signaled to the investigators that a dose-limiting toxicity had been reached.

Some patients also reported headaches after lumbar punctures, which were expected. Two patients also developed mild febrile reactions after administrations that were self-limited.

Treatment with MSCs led to a significantly lower rate of disease progression as measured by total score on the Unified MSA Rating Scale (0.43 vs. 1.22 points/month; P = .009), and this difference was even greater for the medium-dose tier than for the low-dose tier. The investigators used the placebo group from their recently completed rifampicin treatment trial in MSA to make the efficacy assessment.

There was no change between the treatment groups and the historical control group on the Composite Autonomic Symptom Scale or the Composite Autonomic Severity Score from baseline to 1 year.

Based on the promising findings, the Food and Drug Administration granted permission for a compassionate extension study for apparent responders to receive additional injections every 6 months, and, so far, 16 patients have been reinjected, according to Dr. Singer.

Dr. Singer and his associates have used these results as the basis for a multicenter, double-blind, placebo-controlled phase II/III study that is in the late planning stages. This kind of trial will be important for determining whether it’s possible to hold the quality of the MSC treatment steady and get the same sort of response across many centers, said Dr. Gibbons, a clinical neurophysiologist at Beth Israel Deaconess Medical Center, Boston, and past-president of the American Autonomic Society.

The trial was supported by grants from the National Institutes of Health, the Cure MSA Foundation, the Food and Drug Administration, the Autonomic Rare Disease Consortium, and Mayo Clinic funds. Dr. Singer and Dr. Gibbons reported having no relevant financial disclosures.

You can watch a video interview with Dr. Singer here.

Vidyard Video

 

 

[email protected]

BOSTON – Intrathecal, autologous mesenchymal stem cell (MSC) treatment provided encouraging results for modifying the disease course of multiple system atrophy with relative safety and tolerability in a phase I/II trial.

The efficacy of MSCs on slowing multiple system atrophy (MSA) progression in a small trial of 24 patients appeared to be dependent on the dose, and, in the highest dose individuals, had a painful implantation response, trial investigator Wolfgang Singer, MD, reported at the annual meeting of the American Academy of Neurology.

Dr. Singer and his colleagues at the Mayo Clinic in Rochester, Minn., chose to investigate MSCs as a treatment because they are multipotent and capable of differentiating into different cell types, including glial cells, and they secrete neurotrophic factors, such as brain-derived neurotrophic factor and glial cell line-derived neurotrophic factor, which are thought to occur at pathologically low levels in individuals with MSA. The intrinsic immunomodulatory action of MSCs may also contribute to a potential benefit on neuroinflammatory aspects of MSA pathology.

MSCs have previously shown promising results on slowing disease progression in an open-label study of Korean patients with MSA, who received an intra-arterial infusion of MSCs into the internal carotids and dominant vertebral artery, followed by intravenous infusions (Clin Pharmacol Ther. 2008 May;83[5]:723-30). Those results were confirmed in a double-blind, placebo-controlled study (Ann Neurol. 2012 Jul;72[1]:32-40), but evidence of microemboli raised concerns with the Mayo Clinic team about stroke risk with the intra-arterial approach, Dr. Singer said.

The intrathecal route of administration also may be advantageous over an intra-arterial approach by reaching the targets of MSCs in the brain “in a more widespread fashion,” Dr. Singer said.

The relative safety and hint of efficacy with the different route of MSC administration in the Mayo Clinic study make it “a really groundbreaking direction to take,” session comoderator Christopher H. Gibbons, MD, said in an interview. “I think this a very good, small, but critical, step in demonstrating that ... you can do this, and maybe there’s a signal that it is, in fact, working at slowing down disease progression, which I think is incredibly important in this disease.”

In the current study, Dr. Singer and his associates intrathecally administered between 10 and 200 million autologous, fat-derived MSCs via lumbar puncture in predefined dose tiers and then followed patients over 1 year. Overall, 8 patients received a single dose of 10 million cells, 12 received a dose of 50 million cells followed by a second 50-million cell dose 4 weeks later, and 4 received a dose of 100 million cells followed by a second 100-million cell dose 4 weeks later.

The 24 patients in the study all met consensus criteria for probable MSA, had at least moderate laboratory evidence of autonomic failure, and were at an early stage of disease with a Unified MSA Rating Scale part 1 score of 18 or less.

In the primary outcome of safety, the investigators reported no treatment–attributable serious adverse events and said that the treatment was generally well-tolerated. All 16 patients who took either the high or medium doses had MRI abnormalities that showed thickening/enhancement of cauda equina nerve roots at the level of the puncture that were asymptomatic and did not lead to neurologic deficits.

The 12 medium-dose patients had variable elevation of cerebrospinal fluid protein and cell counts, and 5 had mild and transient low back pain. In the highest-dose tier, three of four patients developed low back pain, some of which was severe, and the same MRI findings, which signaled to the investigators that a dose-limiting toxicity had been reached.

Some patients also reported headaches after lumbar punctures, which were expected. Two patients also developed mild febrile reactions after administrations that were self-limited.

Treatment with MSCs led to a significantly lower rate of disease progression as measured by total score on the Unified MSA Rating Scale (0.43 vs. 1.22 points/month; P = .009), and this difference was even greater for the medium-dose tier than for the low-dose tier. The investigators used the placebo group from their recently completed rifampicin treatment trial in MSA to make the efficacy assessment.

There was no change between the treatment groups and the historical control group on the Composite Autonomic Symptom Scale or the Composite Autonomic Severity Score from baseline to 1 year.

Based on the promising findings, the Food and Drug Administration granted permission for a compassionate extension study for apparent responders to receive additional injections every 6 months, and, so far, 16 patients have been reinjected, according to Dr. Singer.

Dr. Singer and his associates have used these results as the basis for a multicenter, double-blind, placebo-controlled phase II/III study that is in the late planning stages. This kind of trial will be important for determining whether it’s possible to hold the quality of the MSC treatment steady and get the same sort of response across many centers, said Dr. Gibbons, a clinical neurophysiologist at Beth Israel Deaconess Medical Center, Boston, and past-president of the American Autonomic Society.

The trial was supported by grants from the National Institutes of Health, the Cure MSA Foundation, the Food and Drug Administration, the Autonomic Rare Disease Consortium, and Mayo Clinic funds. Dr. Singer and Dr. Gibbons reported having no relevant financial disclosures.

You can watch a video interview with Dr. Singer here.

Vidyard Video

 

 

[email protected]

BOSTON – Intrathecal, autologous mesenchymal stem cell (MSC) treatment provided encouraging results for modifying the disease course of multiple system atrophy with relative safety and tolerability in a phase I/II trial.

The efficacy of MSCs on slowing multiple system atrophy (MSA) progression in a small trial of 24 patients appeared to be dependent on the dose, and, in the highest dose individuals, had a painful implantation response, trial investigator Wolfgang Singer, MD, reported at the annual meeting of the American Academy of Neurology.

Dr. Singer and his colleagues at the Mayo Clinic in Rochester, Minn., chose to investigate MSCs as a treatment because they are multipotent and capable of differentiating into different cell types, including glial cells, and they secrete neurotrophic factors, such as brain-derived neurotrophic factor and glial cell line-derived neurotrophic factor, which are thought to occur at pathologically low levels in individuals with MSA. The intrinsic immunomodulatory action of MSCs may also contribute to a potential benefit on neuroinflammatory aspects of MSA pathology.

MSCs have previously shown promising results on slowing disease progression in an open-label study of Korean patients with MSA, who received an intra-arterial infusion of MSCs into the internal carotids and dominant vertebral artery, followed by intravenous infusions (Clin Pharmacol Ther. 2008 May;83[5]:723-30). Those results were confirmed in a double-blind, placebo-controlled study (Ann Neurol. 2012 Jul;72[1]:32-40), but evidence of microemboli raised concerns with the Mayo Clinic team about stroke risk with the intra-arterial approach, Dr. Singer said.

The intrathecal route of administration also may be advantageous over an intra-arterial approach by reaching the targets of MSCs in the brain “in a more widespread fashion,” Dr. Singer said.

The relative safety and hint of efficacy with the different route of MSC administration in the Mayo Clinic study make it “a really groundbreaking direction to take,” session comoderator Christopher H. Gibbons, MD, said in an interview. “I think this a very good, small, but critical, step in demonstrating that ... you can do this, and maybe there’s a signal that it is, in fact, working at slowing down disease progression, which I think is incredibly important in this disease.”

In the current study, Dr. Singer and his associates intrathecally administered between 10 and 200 million autologous, fat-derived MSCs via lumbar puncture in predefined dose tiers and then followed patients over 1 year. Overall, 8 patients received a single dose of 10 million cells, 12 received a dose of 50 million cells followed by a second 50-million cell dose 4 weeks later, and 4 received a dose of 100 million cells followed by a second 100-million cell dose 4 weeks later.

The 24 patients in the study all met consensus criteria for probable MSA, had at least moderate laboratory evidence of autonomic failure, and were at an early stage of disease with a Unified MSA Rating Scale part 1 score of 18 or less.

In the primary outcome of safety, the investigators reported no treatment–attributable serious adverse events and said that the treatment was generally well-tolerated. All 16 patients who took either the high or medium doses had MRI abnormalities that showed thickening/enhancement of cauda equina nerve roots at the level of the puncture that were asymptomatic and did not lead to neurologic deficits.

The 12 medium-dose patients had variable elevation of cerebrospinal fluid protein and cell counts, and 5 had mild and transient low back pain. In the highest-dose tier, three of four patients developed low back pain, some of which was severe, and the same MRI findings, which signaled to the investigators that a dose-limiting toxicity had been reached.

Some patients also reported headaches after lumbar punctures, which were expected. Two patients also developed mild febrile reactions after administrations that were self-limited.

Treatment with MSCs led to a significantly lower rate of disease progression as measured by total score on the Unified MSA Rating Scale (0.43 vs. 1.22 points/month; P = .009), and this difference was even greater for the medium-dose tier than for the low-dose tier. The investigators used the placebo group from their recently completed rifampicin treatment trial in MSA to make the efficacy assessment.

There was no change between the treatment groups and the historical control group on the Composite Autonomic Symptom Scale or the Composite Autonomic Severity Score from baseline to 1 year.

Based on the promising findings, the Food and Drug Administration granted permission for a compassionate extension study for apparent responders to receive additional injections every 6 months, and, so far, 16 patients have been reinjected, according to Dr. Singer.

Dr. Singer and his associates have used these results as the basis for a multicenter, double-blind, placebo-controlled phase II/III study that is in the late planning stages. This kind of trial will be important for determining whether it’s possible to hold the quality of the MSC treatment steady and get the same sort of response across many centers, said Dr. Gibbons, a clinical neurophysiologist at Beth Israel Deaconess Medical Center, Boston, and past-president of the American Autonomic Society.

The trial was supported by grants from the National Institutes of Health, the Cure MSA Foundation, the Food and Drug Administration, the Autonomic Rare Disease Consortium, and Mayo Clinic funds. Dr. Singer and Dr. Gibbons reported having no relevant financial disclosures.

You can watch a video interview with Dr. Singer here.

Vidyard Video

 

 

[email protected]

BOSTON – Texas neurologist Louise McCullough, MD, PhD, is determined to help women live longer by urging neurologists to focus on the unique risks and needs involved.

Dr. McCullough, chief of neurology at Memorial Hermann Hospital in Houston, told a plenary audience at the annual meeting of the American Academy of Neurology that both biological and social factors contribute to conditions, such as atrial fibrillation, that are more dangerous in females than in males.

For example, women are less likely than men to be taking blood thinners, she said, possibly because doctors assume they’re frail even when they’ll confirm – if only someone asks – that they haven’t fallen.

At the same time, she said, women with atrial fibrillation are twice as likely as their male counterparts to suffer a stroke. “You need to screen older women for a-fib and have a much lower threshold for treatment.”

Isolation can be another contributing factor to the stroke gender gap, she said. “Women are often living alone – they’ve outlived their spouses; they don’t live near their children; they may not have access to rapid care.”

These factors, she said, may even contribute to the smaller presence of women in clinical trials.

Dr. McCullough discussed these issues and more in a video interview at the meeting.

BOSTON – Texas neurologist Louise McCullough, MD, PhD, is determined to help women live longer by urging neurologists to focus on the unique risks and needs involved.

Dr. McCullough, chief of neurology at Memorial Hermann Hospital in Houston, told a plenary audience at the annual meeting of the American Academy of Neurology that both biological and social factors contribute to conditions, such as atrial fibrillation, that are more dangerous in females than in males.

For example, women are less likely than men to be taking blood thinners, she said, possibly because doctors assume they’re frail even when they’ll confirm – if only someone asks – that they haven’t fallen.

At the same time, she said, women with atrial fibrillation are twice as likely as their male counterparts to suffer a stroke. “You need to screen older women for a-fib and have a much lower threshold for treatment.”

Isolation can be another contributing factor to the stroke gender gap, she said. “Women are often living alone – they’ve outlived their spouses; they don’t live near their children; they may not have access to rapid care.”

These factors, she said, may even contribute to the smaller presence of women in clinical trials.

Dr. McCullough discussed these issues and more in a video interview at the meeting.

BOSTON – Texas neurologist Louise McCullough, MD, PhD, is determined to help women live longer by urging neurologists to focus on the unique risks and needs involved.

Dr. McCullough, chief of neurology at Memorial Hermann Hospital in Houston, told a plenary audience at the annual meeting of the American Academy of Neurology that both biological and social factors contribute to conditions, such as atrial fibrillation, that are more dangerous in females than in males.

For example, women are less likely than men to be taking blood thinners, she said, possibly because doctors assume they’re frail even when they’ll confirm – if only someone asks – that they haven’t fallen.

At the same time, she said, women with atrial fibrillation are twice as likely as their male counterparts to suffer a stroke. “You need to screen older women for a-fib and have a much lower threshold for treatment.”

Isolation can be another contributing factor to the stroke gender gap, she said. “Women are often living alone – they’ve outlived their spouses; they don’t live near their children; they may not have access to rapid care.”

These factors, she said, may even contribute to the smaller presence of women in clinical trials.

Dr. McCullough discussed these issues and more in a video interview at the meeting.