Key clinical point: Patients with invasive lobular carcinoma (ILC) of the breast showed worse prognostic outcomes than patients with ILC who also had lobular carcinoma in situ (LCIS).

Major finding: Patients with ILC + LCIS vs ILC only had better median distant recurrence-free survival (DRFS; 16.8 vs 10.1 years; hazard ratio [HR] 0.55; P < .0001) and overall survival (OS; 18.9 vs 13.7 years; HR 0.62; P < .0001) rates, with the absence of LCIS being associated with poor prognosis in terms of both DRFS (adjusted HR 1.78; P < .0001) and OS (adjusted HR 1.60; P < .0001) outcomes.

Study details: This observational, population-based investigation included the data of 4217 patients with stages I-III ILC (of whom 45% had co-existing LCIS) from the MD Anderson breast cancer prospectively collected electronic database.

Disclosures: This study was partly supported by the US National Institutes of Health/National Cancer Institute Cancer Center Support Grant. Five authors declared receiving consulting fees or research support from various sources. The other authors declared no conflicts of interest.

Source: Mouabbi JA et al. Absence of lobular carcinoma in situ is a poor prognostic marker in invasive lobular carcinoma. Eur J Cancer. 2023;191:113250 (Jul 21). doi: 10.1016/j.ejca.2023.113250

Key clinical point: Patients with invasive lobular carcinoma (ILC) of the breast showed worse prognostic outcomes than patients with ILC who also had lobular carcinoma in situ (LCIS).

Major finding: Patients with ILC + LCIS vs ILC only had better median distant recurrence-free survival (DRFS; 16.8 vs 10.1 years; hazard ratio [HR] 0.55; P < .0001) and overall survival (OS; 18.9 vs 13.7 years; HR 0.62; P < .0001) rates, with the absence of LCIS being associated with poor prognosis in terms of both DRFS (adjusted HR 1.78; P < .0001) and OS (adjusted HR 1.60; P < .0001) outcomes.

Study details: This observational, population-based investigation included the data of 4217 patients with stages I-III ILC (of whom 45% had co-existing LCIS) from the MD Anderson breast cancer prospectively collected electronic database.

Disclosures: This study was partly supported by the US National Institutes of Health/National Cancer Institute Cancer Center Support Grant. Five authors declared receiving consulting fees or research support from various sources. The other authors declared no conflicts of interest.

Source: Mouabbi JA et al. Absence of lobular carcinoma in situ is a poor prognostic marker in invasive lobular carcinoma. Eur J Cancer. 2023;191:113250 (Jul 21). doi: 10.1016/j.ejca.2023.113250

Key clinical point: Patients with invasive lobular carcinoma (ILC) of the breast showed worse prognostic outcomes than patients with ILC who also had lobular carcinoma in situ (LCIS).

Major finding: Patients with ILC + LCIS vs ILC only had better median distant recurrence-free survival (DRFS; 16.8 vs 10.1 years; hazard ratio [HR] 0.55; P < .0001) and overall survival (OS; 18.9 vs 13.7 years; HR 0.62; P < .0001) rates, with the absence of LCIS being associated with poor prognosis in terms of both DRFS (adjusted HR 1.78; P < .0001) and OS (adjusted HR 1.60; P < .0001) outcomes.

Study details: This observational, population-based investigation included the data of 4217 patients with stages I-III ILC (of whom 45% had co-existing LCIS) from the MD Anderson breast cancer prospectively collected electronic database.

Disclosures: This study was partly supported by the US National Institutes of Health/National Cancer Institute Cancer Center Support Grant. Five authors declared receiving consulting fees or research support from various sources. The other authors declared no conflicts of interest.

Source: Mouabbi JA et al. Absence of lobular carcinoma in situ is a poor prognostic marker in invasive lobular carcinoma. Eur J Cancer. 2023;191:113250 (Jul 21). doi: 10.1016/j.ejca.2023.113250

Key clinical point: Consumption of alcohol during and 6 months after breast cancer (BC) diagnosis did not negatively impact mortality rates in women who survived BC.

Major finding: The occasional consumption of alcohol (0.36 to < 0.6 g/day) during BC diagnosis (hazard ratio [HR] 0.71; 95% CI 0.54-0.94) and 6 months after BC diagnosis (HR 0.67; 95% CI 0.47-0.94) was associated with a lower risk for all-cause mortality in women with body mass index ≥ 30 kg/m².

Study details: This study analyzed 3659 BC survivors from The Pathways Study (a prospective cohort study) who were diagnosed with stages I-IV invasive BC.

Disclosures: This study was supported by the US National Cancer Institute. The authors declared no conflicts of interest.

Source: Kwan ML et al. Alcohol consumption and prognosis and survival in breast cancer survivors: The Pathways Study. Cancer. 2023 (Aug 9). doi: 10.1002/cncr.34972

Key clinical point: Consumption of alcohol during and 6 months after breast cancer (BC) diagnosis did not negatively impact mortality rates in women who survived BC.

Major finding: The occasional consumption of alcohol (0.36 to < 0.6 g/day) during BC diagnosis (hazard ratio [HR] 0.71; 95% CI 0.54-0.94) and 6 months after BC diagnosis (HR 0.67; 95% CI 0.47-0.94) was associated with a lower risk for all-cause mortality in women with body mass index ≥ 30 kg/m².

Study details: This study analyzed 3659 BC survivors from The Pathways Study (a prospective cohort study) who were diagnosed with stages I-IV invasive BC.

Disclosures: This study was supported by the US National Cancer Institute. The authors declared no conflicts of interest.

Source: Kwan ML et al. Alcohol consumption and prognosis and survival in breast cancer survivors: The Pathways Study. Cancer. 2023 (Aug 9). doi: 10.1002/cncr.34972

Key clinical point: Consumption of alcohol during and 6 months after breast cancer (BC) diagnosis did not negatively impact mortality rates in women who survived BC.

Major finding: The occasional consumption of alcohol (0.36 to < 0.6 g/day) during BC diagnosis (hazard ratio [HR] 0.71; 95% CI 0.54-0.94) and 6 months after BC diagnosis (HR 0.67; 95% CI 0.47-0.94) was associated with a lower risk for all-cause mortality in women with body mass index ≥ 30 kg/m².

Study details: This study analyzed 3659 BC survivors from The Pathways Study (a prospective cohort study) who were diagnosed with stages I-IV invasive BC.

Disclosures: This study was supported by the US National Cancer Institute. The authors declared no conflicts of interest.

Source: Kwan ML et al. Alcohol consumption and prognosis and survival in breast cancer survivors: The Pathways Study. Cancer. 2023 (Aug 9). doi: 10.1002/cncr.34972

In data from the 2018-2020 National Survey of Children’s Health, an annual, nationally representative cross-sectional study, fewer than half of children aged 3-5 with private insurance received vision testing, with rates even lower in those lacking private insurance. The findings point to unmet eye care needs, especially in young children for whom early testing to ward off vision loss is highly recommended.

The report was published online in JAMA Ophthalmology by Olivia J. Killeen MD, MS, an ophthalmologist during the study in the department of ophthalmology and visual sciences at the University of Michigan, Ann Arbor, and colleagues.

Grace Han

Future work should focus on improving primary care provider vision screening rates, especially for the 3- to 5-year age group, the authors wrote.

“Because children often are not aware they have an eye problem, routine vision testing in the primary care setting can help identify those with potential eye disease,” Dr. Killeen said. “We have an opportunity to improve the early detection and treatment of eye disease by improving primary care vision testing.”

Childhood vision testing, which falls into the vital signs section of the wellness check, is critical because undiagnosed problems can cause amblyopia or “lazy eye.” The American Academy of Pediatrics recommends vision testing at well-child visits starting at age 3. Regional studies,however, have suggested low rates of PCP vision testing.
 

Study findings

In a sample of 89,936 participants, with a mean age of 10 years (51.1% male), an estimated 30.7% overall received vision testing in primary care. Adjusted odds of vision testing in primary care decreased by 41% (odds ratio, 0.59; 95% confidence interval [CI], 0.49-0.72) for uninsured and by 24% (OR, 0.76; 95% CI, 0.70-0.82) for publicly insured participants vs. those with private insurance.

Adjusted estimated probability of vision testing was 22% (95% CI, 18.8%-25.2%) for uninsured participants, 26.6% (95% CI, 25.3%-27.9%) for those publicly insured, and 32.3% (95% CI, 31.4%-33.%) for those privately insured.

In children aged 3-5, estimated probability was 29.7% (95% CI, 25.6%-33.7%) for those uninsured, 35.2% (95% CI, 33.1%-37.3%) for those publicly insured, and 41.6% (95% CI, 39.8%-43.5%) for those privately insured – all well under 50%. The children least likely to be tested, regardless of insurance status, were adolescents aged 12-17.

Commenting on the study but not involved in it, Natalie J. Choi, MD, assistant professor of family medicine at Northwestern Medicine in Chicago, noted that the authors did not address other screening venues such as schools. She also pointed out that it is challenging for primary care physicians to address all the recommended prevention measures in addition to acute issues during an office visit.

Northwestern University

In data from the 2018-2020 National Survey of Children’s Health, an annual, nationally representative cross-sectional study, fewer than half of children aged 3-5 with private insurance received vision testing, with rates even lower in those lacking private insurance. The findings point to unmet eye care needs, especially in young children for whom early testing to ward off vision loss is highly recommended.

The report was published online in JAMA Ophthalmology by Olivia J. Killeen MD, MS, an ophthalmologist during the study in the department of ophthalmology and visual sciences at the University of Michigan, Ann Arbor, and colleagues.

Grace Han

Future work should focus on improving primary care provider vision screening rates, especially for the 3- to 5-year age group, the authors wrote.

“Because children often are not aware they have an eye problem, routine vision testing in the primary care setting can help identify those with potential eye disease,” Dr. Killeen said. “We have an opportunity to improve the early detection and treatment of eye disease by improving primary care vision testing.”

Childhood vision testing, which falls into the vital signs section of the wellness check, is critical because undiagnosed problems can cause amblyopia or “lazy eye.” The American Academy of Pediatrics recommends vision testing at well-child visits starting at age 3. Regional studies,however, have suggested low rates of PCP vision testing.
 

Study findings

In a sample of 89,936 participants, with a mean age of 10 years (51.1% male), an estimated 30.7% overall received vision testing in primary care. Adjusted odds of vision testing in primary care decreased by 41% (odds ratio, 0.59; 95% confidence interval [CI], 0.49-0.72) for uninsured and by 24% (OR, 0.76; 95% CI, 0.70-0.82) for publicly insured participants vs. those with private insurance.

Adjusted estimated probability of vision testing was 22% (95% CI, 18.8%-25.2%) for uninsured participants, 26.6% (95% CI, 25.3%-27.9%) for those publicly insured, and 32.3% (95% CI, 31.4%-33.%) for those privately insured.

In children aged 3-5, estimated probability was 29.7% (95% CI, 25.6%-33.7%) for those uninsured, 35.2% (95% CI, 33.1%-37.3%) for those publicly insured, and 41.6% (95% CI, 39.8%-43.5%) for those privately insured – all well under 50%. The children least likely to be tested, regardless of insurance status, were adolescents aged 12-17.

Commenting on the study but not involved in it, Natalie J. Choi, MD, assistant professor of family medicine at Northwestern Medicine in Chicago, noted that the authors did not address other screening venues such as schools. She also pointed out that it is challenging for primary care physicians to address all the recommended prevention measures in addition to acute issues during an office visit.

Northwestern University

In data from the 2018-2020 National Survey of Children’s Health, an annual, nationally representative cross-sectional study, fewer than half of children aged 3-5 with private insurance received vision testing, with rates even lower in those lacking private insurance. The findings point to unmet eye care needs, especially in young children for whom early testing to ward off vision loss is highly recommended.

The report was published online in JAMA Ophthalmology by Olivia J. Killeen MD, MS, an ophthalmologist during the study in the department of ophthalmology and visual sciences at the University of Michigan, Ann Arbor, and colleagues.

Grace Han

Future work should focus on improving primary care provider vision screening rates, especially for the 3- to 5-year age group, the authors wrote.

“Because children often are not aware they have an eye problem, routine vision testing in the primary care setting can help identify those with potential eye disease,” Dr. Killeen said. “We have an opportunity to improve the early detection and treatment of eye disease by improving primary care vision testing.”

Childhood vision testing, which falls into the vital signs section of the wellness check, is critical because undiagnosed problems can cause amblyopia or “lazy eye.” The American Academy of Pediatrics recommends vision testing at well-child visits starting at age 3. Regional studies,however, have suggested low rates of PCP vision testing.
 

Study findings

In a sample of 89,936 participants, with a mean age of 10 years (51.1% male), an estimated 30.7% overall received vision testing in primary care. Adjusted odds of vision testing in primary care decreased by 41% (odds ratio, 0.59; 95% confidence interval [CI], 0.49-0.72) for uninsured and by 24% (OR, 0.76; 95% CI, 0.70-0.82) for publicly insured participants vs. those with private insurance.

Adjusted estimated probability of vision testing was 22% (95% CI, 18.8%-25.2%) for uninsured participants, 26.6% (95% CI, 25.3%-27.9%) for those publicly insured, and 32.3% (95% CI, 31.4%-33.%) for those privately insured.

In children aged 3-5, estimated probability was 29.7% (95% CI, 25.6%-33.7%) for those uninsured, 35.2% (95% CI, 33.1%-37.3%) for those publicly insured, and 41.6% (95% CI, 39.8%-43.5%) for those privately insured – all well under 50%. The children least likely to be tested, regardless of insurance status, were adolescents aged 12-17.

Commenting on the study but not involved in it, Natalie J. Choi, MD, assistant professor of family medicine at Northwestern Medicine in Chicago, noted that the authors did not address other screening venues such as schools. She also pointed out that it is challenging for primary care physicians to address all the recommended prevention measures in addition to acute issues during an office visit.

Northwestern University

A telehealth primary care visit more than doubled the well-visit show rate for a cohort of hard-to-reach adolescents, results of a small pilot study show.

Brian P. Jenssen, MD, MSHP, department of pediatrics, University of Pennsylvania, Philadelphia, led the pilot study and the project team, which included physicians, researchers, and experts in innovation, quality improvement, and data analytics.

Findings were published online in Annals of Family Medicine.

Keeping adolescents in consistent primary care can be challenging for many reasons. The study authors note, “Only 50% of adolescents have had a health supervision visit in the past year, missing a critical opportunity for clinicians to influence health, development, screening, and counseling.”

Interest high in hard-to-reach group

This study included a particularly hard-to-reach group of 18-year-old patients at an urban primary care clinic who were lost to follow-up and had Medicaid insurance. They had not completed a well visit in more than 2 years and had a history of no-show visits.

Interest in the pilot program was high. The authors write: “We contacted patients (or their caregivers) to gauge interest in a virtual well visit with a goal to fill five telehealth slots in one evening block with one clinician. Due to high patient interest and demand, we expanded to 15 slots over three evenings, filling the slots after contacting just 24 patients.”

Professional organizations have recommended a telehealth/in-person hybrid care model to meet hard-to-reach adolescents “wherever they are,” the authors note, but the concept has not been well studied.

Under the hybrid model, the first visit is through telehealth and in-person follow-up is scheduled as needed.

Navigators contacted patients to remind them of the appointment, and helped activate the patient portal and complete previsit screening questions for depression and other health risks.

Telehealth visits were billed as preventive visits and in-person follow-up visits as no-charge nurse visits, and these payments were supported by Medicaid.
 

Sharp increase in show rate

In the pilot study, of the 15 patients scheduled for the telehealth visit, 11 connected virtually (73% show rate). Of those, nine needed in-person follow-up, and five completed the follow-up.

Before the intervention, the average well-visit show rate for this patient group was 33%.

Clinicians counseled all the patients about substance use and safe sex. One patient screened positive for depression and was then connected to services. Two patients were started on birth control.

During the in-person follow-up, all patients received vaccinations (influenza, meningococcal, and/or COVID-19) and were screened for sexually transmitted infection. Eight patients completed the satisfaction survey and all said they liked the convenience of the telehealth visit.
 

Telehealth may reduce barriers for teens

Anthony Cheng, MD, a family medicine physician at Oregon Health & Science University in Portland, who was not part of the study, said he found the hybrid model promising.

One reason is that telehealth eliminates the need for transportation to medical appointments, which can be a barrier for adolescents.

Among the top causes of death for young people are mental health issues and addressing those, Dr. Cheng noted, is well-suited to a telehealth visit.

“There’s so much we can do if we can establish a relationship and maintain a relationship with our patients as young adults,” he said. “People do better when they have a regular source of care.”

He added that adolescents also have grown up communicating via screens so it’s often more comfortable for them to communicate with health care providers this way.

Dr. Cheng said adopting such a model may be difficult for providers reluctant to switch from the practice model with which they are most comfortable.

“We prefer to do things we have the most confidence in,” he said. “It does take an investment to train staff and build your own clinical comfort. If that experience wasn’t good over the past 3 years, you may be anxious to get back to your normal way of doing business.”

The authors and Dr. Cheng have no relevant financial relationships to disclose.

A telehealth primary care visit more than doubled the well-visit show rate for a cohort of hard-to-reach adolescents, results of a small pilot study show.

Brian P. Jenssen, MD, MSHP, department of pediatrics, University of Pennsylvania, Philadelphia, led the pilot study and the project team, which included physicians, researchers, and experts in innovation, quality improvement, and data analytics.

Findings were published online in Annals of Family Medicine.

Keeping adolescents in consistent primary care can be challenging for many reasons. The study authors note, “Only 50% of adolescents have had a health supervision visit in the past year, missing a critical opportunity for clinicians to influence health, development, screening, and counseling.”

Interest high in hard-to-reach group

This study included a particularly hard-to-reach group of 18-year-old patients at an urban primary care clinic who were lost to follow-up and had Medicaid insurance. They had not completed a well visit in more than 2 years and had a history of no-show visits.

Interest in the pilot program was high. The authors write: “We contacted patients (or their caregivers) to gauge interest in a virtual well visit with a goal to fill five telehealth slots in one evening block with one clinician. Due to high patient interest and demand, we expanded to 15 slots over three evenings, filling the slots after contacting just 24 patients.”

Professional organizations have recommended a telehealth/in-person hybrid care model to meet hard-to-reach adolescents “wherever they are,” the authors note, but the concept has not been well studied.

Under the hybrid model, the first visit is through telehealth and in-person follow-up is scheduled as needed.

Navigators contacted patients to remind them of the appointment, and helped activate the patient portal and complete previsit screening questions for depression and other health risks.

Telehealth visits were billed as preventive visits and in-person follow-up visits as no-charge nurse visits, and these payments were supported by Medicaid.
 

Sharp increase in show rate

In the pilot study, of the 15 patients scheduled for the telehealth visit, 11 connected virtually (73% show rate). Of those, nine needed in-person follow-up, and five completed the follow-up.

Before the intervention, the average well-visit show rate for this patient group was 33%.

Clinicians counseled all the patients about substance use and safe sex. One patient screened positive for depression and was then connected to services. Two patients were started on birth control.

During the in-person follow-up, all patients received vaccinations (influenza, meningococcal, and/or COVID-19) and were screened for sexually transmitted infection. Eight patients completed the satisfaction survey and all said they liked the convenience of the telehealth visit.
 

Telehealth may reduce barriers for teens

Anthony Cheng, MD, a family medicine physician at Oregon Health & Science University in Portland, who was not part of the study, said he found the hybrid model promising.

One reason is that telehealth eliminates the need for transportation to medical appointments, which can be a barrier for adolescents.

Among the top causes of death for young people are mental health issues and addressing those, Dr. Cheng noted, is well-suited to a telehealth visit.

“There’s so much we can do if we can establish a relationship and maintain a relationship with our patients as young adults,” he said. “People do better when they have a regular source of care.”

He added that adolescents also have grown up communicating via screens so it’s often more comfortable for them to communicate with health care providers this way.

Dr. Cheng said adopting such a model may be difficult for providers reluctant to switch from the practice model with which they are most comfortable.

“We prefer to do things we have the most confidence in,” he said. “It does take an investment to train staff and build your own clinical comfort. If that experience wasn’t good over the past 3 years, you may be anxious to get back to your normal way of doing business.”

The authors and Dr. Cheng have no relevant financial relationships to disclose.

A telehealth primary care visit more than doubled the well-visit show rate for a cohort of hard-to-reach adolescents, results of a small pilot study show.

Brian P. Jenssen, MD, MSHP, department of pediatrics, University of Pennsylvania, Philadelphia, led the pilot study and the project team, which included physicians, researchers, and experts in innovation, quality improvement, and data analytics.

Findings were published online in Annals of Family Medicine.

Keeping adolescents in consistent primary care can be challenging for many reasons. The study authors note, “Only 50% of adolescents have had a health supervision visit in the past year, missing a critical opportunity for clinicians to influence health, development, screening, and counseling.”

Interest high in hard-to-reach group

This study included a particularly hard-to-reach group of 18-year-old patients at an urban primary care clinic who were lost to follow-up and had Medicaid insurance. They had not completed a well visit in more than 2 years and had a history of no-show visits.

Interest in the pilot program was high. The authors write: “We contacted patients (or their caregivers) to gauge interest in a virtual well visit with a goal to fill five telehealth slots in one evening block with one clinician. Due to high patient interest and demand, we expanded to 15 slots over three evenings, filling the slots after contacting just 24 patients.”

Professional organizations have recommended a telehealth/in-person hybrid care model to meet hard-to-reach adolescents “wherever they are,” the authors note, but the concept has not been well studied.

Under the hybrid model, the first visit is through telehealth and in-person follow-up is scheduled as needed.

Navigators contacted patients to remind them of the appointment, and helped activate the patient portal and complete previsit screening questions for depression and other health risks.

Telehealth visits were billed as preventive visits and in-person follow-up visits as no-charge nurse visits, and these payments were supported by Medicaid.
 

Sharp increase in show rate

In the pilot study, of the 15 patients scheduled for the telehealth visit, 11 connected virtually (73% show rate). Of those, nine needed in-person follow-up, and five completed the follow-up.

Before the intervention, the average well-visit show rate for this patient group was 33%.

Clinicians counseled all the patients about substance use and safe sex. One patient screened positive for depression and was then connected to services. Two patients were started on birth control.

During the in-person follow-up, all patients received vaccinations (influenza, meningococcal, and/or COVID-19) and were screened for sexually transmitted infection. Eight patients completed the satisfaction survey and all said they liked the convenience of the telehealth visit.
 

Telehealth may reduce barriers for teens

Anthony Cheng, MD, a family medicine physician at Oregon Health & Science University in Portland, who was not part of the study, said he found the hybrid model promising.

One reason is that telehealth eliminates the need for transportation to medical appointments, which can be a barrier for adolescents.

Among the top causes of death for young people are mental health issues and addressing those, Dr. Cheng noted, is well-suited to a telehealth visit.

“There’s so much we can do if we can establish a relationship and maintain a relationship with our patients as young adults,” he said. “People do better when they have a regular source of care.”

He added that adolescents also have grown up communicating via screens so it’s often more comfortable for them to communicate with health care providers this way.

Dr. Cheng said adopting such a model may be difficult for providers reluctant to switch from the practice model with which they are most comfortable.

“We prefer to do things we have the most confidence in,” he said. “It does take an investment to train staff and build your own clinical comfort. If that experience wasn’t good over the past 3 years, you may be anxious to get back to your normal way of doing business.”

The authors and Dr. Cheng have no relevant financial relationships to disclose.

ILLUSTRATION: KIMBERLY MARTENS FOR OBG MANAGEMENT

CASE Painful, heavy menstruation and recurrent pregnancy loss

A 37-year-old woman (G3P0030) with a history of recurrent pregnancy loss presents for evaluation. She had 3 losses—most recently a miscarriage at 22 weeks with a cerclage in place. She did not undergo any surgical procedures for these losses. Hormonal and thrombophilia workup is negative and semen analysis is normal. She reports a history of painful, heavy periods for many years, as well as dyspareunia and occasional post-coital bleeding. Past medical history was otherwise unremarkable. Pelvic magnetic resonance imaging (MRI) revealed focal thickening of the junctional zone up to 15 mm with 2 foci of T2 hyperintensities suggesting adenomyosis (FIGURE 1).

How do you counsel this patient regarding the MRI findings and their impact on her fertility?

Adenomyosis is a condition in which endometrial glands and stroma are abnormally present in the uterine myometrium, resulting in smooth muscle hypertrophy and abnormal uterine contractility. Traditional teaching describes a woman in her 40s with heavy and painful menses, a “boggy uterus” on examination, who has completed childbearing and desires definitive treatment. Histologic diagnosis of adenomyosis is made from the uterine specimen at the time of hysterectomy, invariably confounding our understanding of the epidemiology of adenomyosis.

More recently, however, we are beginning to learn that this narrative is misguided. Imaging changes of adenomyosis can be seen in women who desire future fertility and in adolescents with severe dysmenorrhea, suggesting an earlier age of incidence.¹ In a recent systematic review, prevalence estimates ranged from 15% to 67%, owing to varying diagnostic methods and patient inclusion criteria.² It is increasingly being recognized as a primary contributor to infertility, with one study estimating a 30% prevalence of infertility in women with adenomyosis.³ Moreover, treatment with gonadotropin-releasing hormone agonists and/or surgical excision may improve fertility outcomes.⁴

As we learn more about this prevalent and life-altering condition, we owe it to our patients to consider this diagnosis when counseling on dysmenorrhea, heavy menstrual bleeding, or infertility.

Anatomy of the myometrium

The myometrium is composed of the inner and outer myometrium: the inner myometrium (IM) and endometrium are of Müllerian origin, and the outer myometrium (OM) is of mesenchymal origin. The IM thickens in response to steroid hormones during the menstrual cycle with metaplasia of endometrial stromal cells into myocytes and back again, whereas the OM is not responsive to hormones.⁵ Emerging literature suggests the OM is further divided into a middle and outer section based on different histologic morphologies, though the clinical implications of this are not understood.⁶ The term “junctional zone” (JZ) refers to the imaging appearance of what is thought to be the IM. Interestingly it cannot be identified on traditional hematoxylin and eosin staining. When the JZ is thickened or demonstrates irregular borders, it is used as a diagnostic marker for adenomyosis and is postulated to play an important role in adenomyosis pathophysiology, particularly heavy menstrual bleeding and infertility.⁷

Continue to: Subtypes of adenomyosis...

Subtypes of adenomyosis

While various disease classifications have been suggested for adenomyosis, to date there is no international consensus. Adenomyosis is typically described in 3 forms: diffuse, focal, or adenomyoma.⁸ As implied, the term focal adenomyosis refers to discrete lesions surrounded by normal myometrium, whereas abnormal glandular changes are pervasive throughout the myometrium in diffuse disease. Adenomyomas are a subgroup of focal adenomyosis that are thought to be surrounded by leiomyomatous smooth muscle and may be well demarcated on imaging.⁹

Recent research uses novel histologic imaging techniques to explore adenomyotic growth patterns in 3-dimensional (3D) reconstructions. Combining tissue-clearing methods with light-sheet fluorescence microscopy enables highly detailed 3D representations of the protein and nucleic acid structure of organs.¹⁰ For example, Yamaguchi and colleagues used this technology to explore the 3D morphological features of adenomyotic tissue and observed direct invasion of the endometrial glands into the myometrium and an “ant colony ̶ like network” of ectopic endometrial glands in the myometrium (FIGURE 2).¹¹ These abnormal glandular networks have been visualized beyond the IM, which may not be captured on ultrasonography or MRI. While this work is still in its infancy, it has the potential to provide important insight into disease pathogenesis and to inform future therapy.

Pathogenesis

Proposed mechanisms for the development of adenomyosis include endometrial invasion, tissue injury and repair (TIAR) mechanisms, and the stem cell theory.¹² According to the endometrial invasion theory, glandular epithelial cells from the basalis layer invaginate through an altered IM, slipping through weak muscle fibers and attracted by certain growth factors. In the TIAR mechanism theory, micro- or macro-trauma to the IM (whether from pregnancy, surgery, or infection) results in chronic proliferation and inflammation leading to the development of adenomyosis. Finally, the stem cell theory proposes that adenomyosis might develop from de novo ectopic endometrial tissue.

While the exact pathogenesis of adenomyosis is largely unknown, it has been associated with predictable molecular changes in the endometrium and surrounding myometrium.¹² Myometrial hypercontractility is seen in patients with adenomyosis and dysmenorrhea, whereas neovascularization, high microvessel density, and abnormal uterine contractility are seen in those with abnormal uterine bleeding.¹³ In patients with infertility, increased inflammation, abnormal endometrial receptivity, and alterations in the myometrial architecture have been suggested to impair contractility and sperm transport.^12,14

Differential growth factor expression and abnormal estrogen and progesterone signaling pathways have been observed in the IM in patients with adenomyosis, along with dysregulation of immune factors and increased inflammatory oxidative stress.¹² This in turn results in myometrial hypertrophy and fibrosis, impairing normal uterine contractility patterns. This abnormal contractility may alter sperm transport and embryo implantation, and animal models that target pathways leading to fibrosis may improve endometrial receptivity.^14,15 Further research is needed to elucidate specific molecular pathways and their complex interplay in this disease.

Continue to: Diagnosis...

The gold standard for diagnosis of adenomyosis is histopathology from hysterectomy specimens, but specific definitions vary. Published criteria include endometrial glands within the myometrial layer greater than 0.5 to 1 low power field from the basal layer of the endometrium, endometrial glands extending deeper than 25% of the myometrial thickness, or endometrial glands a certain distance (ranging from 1-3 mm) from the basalis layer of the endometrium.¹⁶ Various methods of non-hysterectomy tissue sampling have been proposed for diagnosis, including needle, hysteroscopic, or laparoscopic sampling, but the sensitivity of these methods is poor.¹⁷ Limiting the diagnosis of adenomyosis to specimen pathology relies on invasive methods and clearly we cannot confirm the diagnosis by hysterectomy in patients with a desire for future fertility. It is for this reason that the prevalence of the disease is widely unknown.

The alternative to pathologic diagnosis is to identify radiologic changes that are associated with adenomyosis via either transvaginal ultrasound (TVUS) or MRI. Features suggestive of adenomyosis on MRI overlap with TVUS features, including uterine enlargement, anteroposterior myometrial asymmetry, T1- or T2-intense myometrial cysts or foci, and a thickened JZ.¹⁸ A JZ thicker than 12 mm has been thought to be predictive of adenomyosis, whereas a thickness of less than 8 mm is predictive of its absence, although the JZ may vary in thickness with the menstrual cycle.^19,20 A 2021 systematic review and meta-analysis comparing MRI diagnosis with histopathologic findings reported a pooled sensitivity and specificity of 60% and 96%, respectively.²¹ The reported range for sensitivity and specificity is wide: 70% to 93% for sensitivity and 67% to 93% for specificity.^22-24

Key TVUS features associated with adenomyosis were defined in 2015 in a consensus statement released by the Morphological Uterus Sonographic Assessment (MUSA) group.²⁵ These include a globally enlarged uterus, anteroposterior myometrial asymmetry, myometrial cysts, fan-shaped shadowing, mixed myometrial echogenicity, translesional vascularity, echogenic subendometrial lines and buds, and a thickened, irregular or discontinuous JZ (FIGURES 3 and 4).²⁵ The accuracy of ultrasonographic diagnosis of adenomyosis using these features has been investigated in multiple systematic reviews and meta-analyses, most recently by Liu and colleagues who found a pooled sensitivity of TVUS of 81% and pooled specificity of 87%.²³ The range for ultrasonographic sensitivity and specificity is wide, however, ranging from 33% to 84% for sensitivity and 64% to 100% for specificity.²² Consensus is lacking as to which TVUS features are most predictive of adenomyosis, but in general, the combination of multiple MUSA criteria (particularly myometrial cysts and irregular JZ on 3D imaging) appears to be more accurate than any one feature alone.²³ The presence of fibroids may decrease the sensitivity of TVUS, and one study suggested elastography may increase the accuracy of TVUS.^24,26 Moreover, given that most radiologists receive limited training on the MUSA criteria, it behooves gynecologists to become familiar with these sonographic features to be able to identify adenomyosis in our patients.

Clinical presentation

While many women who are later diagnosed with adenomyosis are asymptomatic, the disease can present with heavy menstrual bleeding and dysmenorrhea, which occur in 50% and 30% of patients, respectively.²⁸ Other symptoms include dyspareunia and infertility. Symptoms were previously reported to develop between the ages of 40 and 50 years; however, this is biased by diagnosis at the time of hysterectomy and the fact that younger patients are less likely to undergo definitive surgery. When using imaging criteria for diagnosis, adenomyosis might be more responsible for dysmenorrhea and chronic pelvic pain in younger patients than previously appreciated.^1,29 In a recent study reviewing TVUS in 270 adolescents for any reason, adenomyosis was present in 5% of cases and this increased up to 44% in the presence of endometriosis.³⁰

Adenomyosis often co-exists and shares similar clinical presentations with other gynecologic pathologies such as endometriosis and fibroids, making diagnosis on symptomatology alone challenging. Concurrent adenomyosis has been found in up to 73% and 57% of patients with suspected or diagnosed endometriosis and fibroids, respectively.^31,32 Accumulating evidence suggests that pelvic pain previously attributed to endometriosis may in fact be a result of adenomyosis; for example, persistent pelvic pain after optimal resection of endometriosis may be confounded by the presence of adenomyosis.²⁹ In one study of 155 patients with complete resection of deep infiltrating endometriosis, persistent pelvic pain was significantly associated with the presence of adenomyosis on imaging.³³

Adenomyosis is increasingly being recognized at the time of infertility evaluation with an estimated prevalence of 30% in women with infertility.³ Among women with infertility, adenomyosis has been associated with a lower clinical pregnancy rate, higher miscarriage rate, and lower live birth rate, as well as obstetric complications such as abnormal placentation.^34-36 A study of 37 baboons found the histologic diagnosis of adenomyosis alone at necropsy was associated with a 20-fold increased risk of lifelong infertility (odds ratio [OR], 20.1; 95% CI, 2.1-921), whereas presence of endometriosis was associated with a nonsignificant 3-fold risk of lifelong infertility (OR, 3.6; 95% CI, 0.9-15.8).³⁷

In women with endometriosis and infertility, co-existing adenomyosis portends worse fertility outcomes. In a retrospective study of 244 women who underwent endometriosis surgery, more than five features of adenomyosis on imaging was associated with higher rates of infertility, in vitro fertilization treatments, and a higher number of in vitro fertilization cycles.³¹ Moreover, in women who underwent surgery for deep infiltrating endometriosis, the presence of adenomyosis on imaging was associated with a 68% reduction in likelihood of pregnancy after surgery.³⁸

Conclusion

As we begin to learn about adenomyosis, our misconceptions become more evident. The notion that it largely affects women at the end of their reproductive lives is biased by using histopathology at hysterectomy as the gold standard for diagnosis. Lack of definitive histologic or imaging criteria and biopsy techniques add to the diagnostic challenge. This in turn leads to inaccurate estimates of incidence and prevalence, as we assume patients’ symptoms must be attributable to what we can see at the time of surgery (for example, Stage I or II endometriosis), rather than what we cannot see. We now know that adenomyosis is present in women of all ages, including adolescents, and can significantly contribute to reduced fertility and quality of life. We owe it to our patients to consider this condition in the differential diagnosis of dysmenorrhea, heavy menstrual bleeding, dyspareunia, and infertility.

CASE Resolved

The patient underwent targeted hysteroscopic resection of adenomyosis (FIGURE 5) and conceived spontaneously the following year. ●

ILLUSTRATION: KIMBERLY MARTENS FOR OBG MANAGEMENT

CASE Painful, heavy menstruation and recurrent pregnancy loss

A 37-year-old woman (G3P0030) with a history of recurrent pregnancy loss presents for evaluation. She had 3 losses—most recently a miscarriage at 22 weeks with a cerclage in place. She did not undergo any surgical procedures for these losses. Hormonal and thrombophilia workup is negative and semen analysis is normal. She reports a history of painful, heavy periods for many years, as well as dyspareunia and occasional post-coital bleeding. Past medical history was otherwise unremarkable. Pelvic magnetic resonance imaging (MRI) revealed focal thickening of the junctional zone up to 15 mm with 2 foci of T2 hyperintensities suggesting adenomyosis (FIGURE 1).

How do you counsel this patient regarding the MRI findings and their impact on her fertility?

Adenomyosis is a condition in which endometrial glands and stroma are abnormally present in the uterine myometrium, resulting in smooth muscle hypertrophy and abnormal uterine contractility. Traditional teaching describes a woman in her 40s with heavy and painful menses, a “boggy uterus” on examination, who has completed childbearing and desires definitive treatment. Histologic diagnosis of adenomyosis is made from the uterine specimen at the time of hysterectomy, invariably confounding our understanding of the epidemiology of adenomyosis.

More recently, however, we are beginning to learn that this narrative is misguided. Imaging changes of adenomyosis can be seen in women who desire future fertility and in adolescents with severe dysmenorrhea, suggesting an earlier age of incidence.¹ In a recent systematic review, prevalence estimates ranged from 15% to 67%, owing to varying diagnostic methods and patient inclusion criteria.² It is increasingly being recognized as a primary contributor to infertility, with one study estimating a 30% prevalence of infertility in women with adenomyosis.³ Moreover, treatment with gonadotropin-releasing hormone agonists and/or surgical excision may improve fertility outcomes.⁴

As we learn more about this prevalent and life-altering condition, we owe it to our patients to consider this diagnosis when counseling on dysmenorrhea, heavy menstrual bleeding, or infertility.

Anatomy of the myometrium

The myometrium is composed of the inner and outer myometrium: the inner myometrium (IM) and endometrium are of Müllerian origin, and the outer myometrium (OM) is of mesenchymal origin. The IM thickens in response to steroid hormones during the menstrual cycle with metaplasia of endometrial stromal cells into myocytes and back again, whereas the OM is not responsive to hormones.⁵ Emerging literature suggests the OM is further divided into a middle and outer section based on different histologic morphologies, though the clinical implications of this are not understood.⁶ The term “junctional zone” (JZ) refers to the imaging appearance of what is thought to be the IM. Interestingly it cannot be identified on traditional hematoxylin and eosin staining. When the JZ is thickened or demonstrates irregular borders, it is used as a diagnostic marker for adenomyosis and is postulated to play an important role in adenomyosis pathophysiology, particularly heavy menstrual bleeding and infertility.⁷

Continue to: Subtypes of adenomyosis...

Subtypes of adenomyosis

While various disease classifications have been suggested for adenomyosis, to date there is no international consensus. Adenomyosis is typically described in 3 forms: diffuse, focal, or adenomyoma.⁸ As implied, the term focal adenomyosis refers to discrete lesions surrounded by normal myometrium, whereas abnormal glandular changes are pervasive throughout the myometrium in diffuse disease. Adenomyomas are a subgroup of focal adenomyosis that are thought to be surrounded by leiomyomatous smooth muscle and may be well demarcated on imaging.⁹

Recent research uses novel histologic imaging techniques to explore adenomyotic growth patterns in 3-dimensional (3D) reconstructions. Combining tissue-clearing methods with light-sheet fluorescence microscopy enables highly detailed 3D representations of the protein and nucleic acid structure of organs.¹⁰ For example, Yamaguchi and colleagues used this technology to explore the 3D morphological features of adenomyotic tissue and observed direct invasion of the endometrial glands into the myometrium and an “ant colony ̶ like network” of ectopic endometrial glands in the myometrium (FIGURE 2).¹¹ These abnormal glandular networks have been visualized beyond the IM, which may not be captured on ultrasonography or MRI. While this work is still in its infancy, it has the potential to provide important insight into disease pathogenesis and to inform future therapy.

Pathogenesis

Proposed mechanisms for the development of adenomyosis include endometrial invasion, tissue injury and repair (TIAR) mechanisms, and the stem cell theory.¹² According to the endometrial invasion theory, glandular epithelial cells from the basalis layer invaginate through an altered IM, slipping through weak muscle fibers and attracted by certain growth factors. In the TIAR mechanism theory, micro- or macro-trauma to the IM (whether from pregnancy, surgery, or infection) results in chronic proliferation and inflammation leading to the development of adenomyosis. Finally, the stem cell theory proposes that adenomyosis might develop from de novo ectopic endometrial tissue.

While the exact pathogenesis of adenomyosis is largely unknown, it has been associated with predictable molecular changes in the endometrium and surrounding myometrium.¹² Myometrial hypercontractility is seen in patients with adenomyosis and dysmenorrhea, whereas neovascularization, high microvessel density, and abnormal uterine contractility are seen in those with abnormal uterine bleeding.¹³ In patients with infertility, increased inflammation, abnormal endometrial receptivity, and alterations in the myometrial architecture have been suggested to impair contractility and sperm transport.^12,14

Differential growth factor expression and abnormal estrogen and progesterone signaling pathways have been observed in the IM in patients with adenomyosis, along with dysregulation of immune factors and increased inflammatory oxidative stress.¹² This in turn results in myometrial hypertrophy and fibrosis, impairing normal uterine contractility patterns. This abnormal contractility may alter sperm transport and embryo implantation, and animal models that target pathways leading to fibrosis may improve endometrial receptivity.^14,15 Further research is needed to elucidate specific molecular pathways and their complex interplay in this disease.

Continue to: Diagnosis...

The gold standard for diagnosis of adenomyosis is histopathology from hysterectomy specimens, but specific definitions vary. Published criteria include endometrial glands within the myometrial layer greater than 0.5 to 1 low power field from the basal layer of the endometrium, endometrial glands extending deeper than 25% of the myometrial thickness, or endometrial glands a certain distance (ranging from 1-3 mm) from the basalis layer of the endometrium.¹⁶ Various methods of non-hysterectomy tissue sampling have been proposed for diagnosis, including needle, hysteroscopic, or laparoscopic sampling, but the sensitivity of these methods is poor.¹⁷ Limiting the diagnosis of adenomyosis to specimen pathology relies on invasive methods and clearly we cannot confirm the diagnosis by hysterectomy in patients with a desire for future fertility. It is for this reason that the prevalence of the disease is widely unknown.

The alternative to pathologic diagnosis is to identify radiologic changes that are associated with adenomyosis via either transvaginal ultrasound (TVUS) or MRI. Features suggestive of adenomyosis on MRI overlap with TVUS features, including uterine enlargement, anteroposterior myometrial asymmetry, T1- or T2-intense myometrial cysts or foci, and a thickened JZ.¹⁸ A JZ thicker than 12 mm has been thought to be predictive of adenomyosis, whereas a thickness of less than 8 mm is predictive of its absence, although the JZ may vary in thickness with the menstrual cycle.^19,20 A 2021 systematic review and meta-analysis comparing MRI diagnosis with histopathologic findings reported a pooled sensitivity and specificity of 60% and 96%, respectively.²¹ The reported range for sensitivity and specificity is wide: 70% to 93% for sensitivity and 67% to 93% for specificity.^22-24

Key TVUS features associated with adenomyosis were defined in 2015 in a consensus statement released by the Morphological Uterus Sonographic Assessment (MUSA) group.²⁵ These include a globally enlarged uterus, anteroposterior myometrial asymmetry, myometrial cysts, fan-shaped shadowing, mixed myometrial echogenicity, translesional vascularity, echogenic subendometrial lines and buds, and a thickened, irregular or discontinuous JZ (FIGURES 3 and 4).²⁵ The accuracy of ultrasonographic diagnosis of adenomyosis using these features has been investigated in multiple systematic reviews and meta-analyses, most recently by Liu and colleagues who found a pooled sensitivity of TVUS of 81% and pooled specificity of 87%.²³ The range for ultrasonographic sensitivity and specificity is wide, however, ranging from 33% to 84% for sensitivity and 64% to 100% for specificity.²² Consensus is lacking as to which TVUS features are most predictive of adenomyosis, but in general, the combination of multiple MUSA criteria (particularly myometrial cysts and irregular JZ on 3D imaging) appears to be more accurate than any one feature alone.²³ The presence of fibroids may decrease the sensitivity of TVUS, and one study suggested elastography may increase the accuracy of TVUS.^24,26 Moreover, given that most radiologists receive limited training on the MUSA criteria, it behooves gynecologists to become familiar with these sonographic features to be able to identify adenomyosis in our patients.

Clinical presentation

While many women who are later diagnosed with adenomyosis are asymptomatic, the disease can present with heavy menstrual bleeding and dysmenorrhea, which occur in 50% and 30% of patients, respectively.²⁸ Other symptoms include dyspareunia and infertility. Symptoms were previously reported to develop between the ages of 40 and 50 years; however, this is biased by diagnosis at the time of hysterectomy and the fact that younger patients are less likely to undergo definitive surgery. When using imaging criteria for diagnosis, adenomyosis might be more responsible for dysmenorrhea and chronic pelvic pain in younger patients than previously appreciated.^1,29 In a recent study reviewing TVUS in 270 adolescents for any reason, adenomyosis was present in 5% of cases and this increased up to 44% in the presence of endometriosis.³⁰

Adenomyosis often co-exists and shares similar clinical presentations with other gynecologic pathologies such as endometriosis and fibroids, making diagnosis on symptomatology alone challenging. Concurrent adenomyosis has been found in up to 73% and 57% of patients with suspected or diagnosed endometriosis and fibroids, respectively.^31,32 Accumulating evidence suggests that pelvic pain previously attributed to endometriosis may in fact be a result of adenomyosis; for example, persistent pelvic pain after optimal resection of endometriosis may be confounded by the presence of adenomyosis.²⁹ In one study of 155 patients with complete resection of deep infiltrating endometriosis, persistent pelvic pain was significantly associated with the presence of adenomyosis on imaging.³³

Adenomyosis is increasingly being recognized at the time of infertility evaluation with an estimated prevalence of 30% in women with infertility.³ Among women with infertility, adenomyosis has been associated with a lower clinical pregnancy rate, higher miscarriage rate, and lower live birth rate, as well as obstetric complications such as abnormal placentation.^34-36 A study of 37 baboons found the histologic diagnosis of adenomyosis alone at necropsy was associated with a 20-fold increased risk of lifelong infertility (odds ratio [OR], 20.1; 95% CI, 2.1-921), whereas presence of endometriosis was associated with a nonsignificant 3-fold risk of lifelong infertility (OR, 3.6; 95% CI, 0.9-15.8).³⁷

In women with endometriosis and infertility, co-existing adenomyosis portends worse fertility outcomes. In a retrospective study of 244 women who underwent endometriosis surgery, more than five features of adenomyosis on imaging was associated with higher rates of infertility, in vitro fertilization treatments, and a higher number of in vitro fertilization cycles.³¹ Moreover, in women who underwent surgery for deep infiltrating endometriosis, the presence of adenomyosis on imaging was associated with a 68% reduction in likelihood of pregnancy after surgery.³⁸

Conclusion

As we begin to learn about adenomyosis, our misconceptions become more evident. The notion that it largely affects women at the end of their reproductive lives is biased by using histopathology at hysterectomy as the gold standard for diagnosis. Lack of definitive histologic or imaging criteria and biopsy techniques add to the diagnostic challenge. This in turn leads to inaccurate estimates of incidence and prevalence, as we assume patients’ symptoms must be attributable to what we can see at the time of surgery (for example, Stage I or II endometriosis), rather than what we cannot see. We now know that adenomyosis is present in women of all ages, including adolescents, and can significantly contribute to reduced fertility and quality of life. We owe it to our patients to consider this condition in the differential diagnosis of dysmenorrhea, heavy menstrual bleeding, dyspareunia, and infertility.

CASE Resolved

The patient underwent targeted hysteroscopic resection of adenomyosis (FIGURE 5) and conceived spontaneously the following year. ●

ILLUSTRATION: KIMBERLY MARTENS FOR OBG MANAGEMENT

CASE Painful, heavy menstruation and recurrent pregnancy loss

A 37-year-old woman (G3P0030) with a history of recurrent pregnancy loss presents for evaluation. She had 3 losses—most recently a miscarriage at 22 weeks with a cerclage in place. She did not undergo any surgical procedures for these losses. Hormonal and thrombophilia workup is negative and semen analysis is normal. She reports a history of painful, heavy periods for many years, as well as dyspareunia and occasional post-coital bleeding. Past medical history was otherwise unremarkable. Pelvic magnetic resonance imaging (MRI) revealed focal thickening of the junctional zone up to 15 mm with 2 foci of T2 hyperintensities suggesting adenomyosis (FIGURE 1).

How do you counsel this patient regarding the MRI findings and their impact on her fertility?

Adenomyosis is a condition in which endometrial glands and stroma are abnormally present in the uterine myometrium, resulting in smooth muscle hypertrophy and abnormal uterine contractility. Traditional teaching describes a woman in her 40s with heavy and painful menses, a “boggy uterus” on examination, who has completed childbearing and desires definitive treatment. Histologic diagnosis of adenomyosis is made from the uterine specimen at the time of hysterectomy, invariably confounding our understanding of the epidemiology of adenomyosis.

More recently, however, we are beginning to learn that this narrative is misguided. Imaging changes of adenomyosis can be seen in women who desire future fertility and in adolescents with severe dysmenorrhea, suggesting an earlier age of incidence.¹ In a recent systematic review, prevalence estimates ranged from 15% to 67%, owing to varying diagnostic methods and patient inclusion criteria.² It is increasingly being recognized as a primary contributor to infertility, with one study estimating a 30% prevalence of infertility in women with adenomyosis.³ Moreover, treatment with gonadotropin-releasing hormone agonists and/or surgical excision may improve fertility outcomes.⁴

As we learn more about this prevalent and life-altering condition, we owe it to our patients to consider this diagnosis when counseling on dysmenorrhea, heavy menstrual bleeding, or infertility.

Anatomy of the myometrium

The myometrium is composed of the inner and outer myometrium: the inner myometrium (IM) and endometrium are of Müllerian origin, and the outer myometrium (OM) is of mesenchymal origin. The IM thickens in response to steroid hormones during the menstrual cycle with metaplasia of endometrial stromal cells into myocytes and back again, whereas the OM is not responsive to hormones.⁵ Emerging literature suggests the OM is further divided into a middle and outer section based on different histologic morphologies, though the clinical implications of this are not understood.⁶ The term “junctional zone” (JZ) refers to the imaging appearance of what is thought to be the IM. Interestingly it cannot be identified on traditional hematoxylin and eosin staining. When the JZ is thickened or demonstrates irregular borders, it is used as a diagnostic marker for adenomyosis and is postulated to play an important role in adenomyosis pathophysiology, particularly heavy menstrual bleeding and infertility.⁷

Continue to: Subtypes of adenomyosis...

Subtypes of adenomyosis

While various disease classifications have been suggested for adenomyosis, to date there is no international consensus. Adenomyosis is typically described in 3 forms: diffuse, focal, or adenomyoma.⁸ As implied, the term focal adenomyosis refers to discrete lesions surrounded by normal myometrium, whereas abnormal glandular changes are pervasive throughout the myometrium in diffuse disease. Adenomyomas are a subgroup of focal adenomyosis that are thought to be surrounded by leiomyomatous smooth muscle and may be well demarcated on imaging.⁹

Recent research uses novel histologic imaging techniques to explore adenomyotic growth patterns in 3-dimensional (3D) reconstructions. Combining tissue-clearing methods with light-sheet fluorescence microscopy enables highly detailed 3D representations of the protein and nucleic acid structure of organs.¹⁰ For example, Yamaguchi and colleagues used this technology to explore the 3D morphological features of adenomyotic tissue and observed direct invasion of the endometrial glands into the myometrium and an “ant colony ̶ like network” of ectopic endometrial glands in the myometrium (FIGURE 2).¹¹ These abnormal glandular networks have been visualized beyond the IM, which may not be captured on ultrasonography or MRI. While this work is still in its infancy, it has the potential to provide important insight into disease pathogenesis and to inform future therapy.

Pathogenesis

Proposed mechanisms for the development of adenomyosis include endometrial invasion, tissue injury and repair (TIAR) mechanisms, and the stem cell theory.¹² According to the endometrial invasion theory, glandular epithelial cells from the basalis layer invaginate through an altered IM, slipping through weak muscle fibers and attracted by certain growth factors. In the TIAR mechanism theory, micro- or macro-trauma to the IM (whether from pregnancy, surgery, or infection) results in chronic proliferation and inflammation leading to the development of adenomyosis. Finally, the stem cell theory proposes that adenomyosis might develop from de novo ectopic endometrial tissue.

While the exact pathogenesis of adenomyosis is largely unknown, it has been associated with predictable molecular changes in the endometrium and surrounding myometrium.¹² Myometrial hypercontractility is seen in patients with adenomyosis and dysmenorrhea, whereas neovascularization, high microvessel density, and abnormal uterine contractility are seen in those with abnormal uterine bleeding.¹³ In patients with infertility, increased inflammation, abnormal endometrial receptivity, and alterations in the myometrial architecture have been suggested to impair contractility and sperm transport.^12,14

Differential growth factor expression and abnormal estrogen and progesterone signaling pathways have been observed in the IM in patients with adenomyosis, along with dysregulation of immune factors and increased inflammatory oxidative stress.¹² This in turn results in myometrial hypertrophy and fibrosis, impairing normal uterine contractility patterns. This abnormal contractility may alter sperm transport and embryo implantation, and animal models that target pathways leading to fibrosis may improve endometrial receptivity.^14,15 Further research is needed to elucidate specific molecular pathways and their complex interplay in this disease.

Continue to: Diagnosis...

The gold standard for diagnosis of adenomyosis is histopathology from hysterectomy specimens, but specific definitions vary. Published criteria include endometrial glands within the myometrial layer greater than 0.5 to 1 low power field from the basal layer of the endometrium, endometrial glands extending deeper than 25% of the myometrial thickness, or endometrial glands a certain distance (ranging from 1-3 mm) from the basalis layer of the endometrium.¹⁶ Various methods of non-hysterectomy tissue sampling have been proposed for diagnosis, including needle, hysteroscopic, or laparoscopic sampling, but the sensitivity of these methods is poor.¹⁷ Limiting the diagnosis of adenomyosis to specimen pathology relies on invasive methods and clearly we cannot confirm the diagnosis by hysterectomy in patients with a desire for future fertility. It is for this reason that the prevalence of the disease is widely unknown.

The alternative to pathologic diagnosis is to identify radiologic changes that are associated with adenomyosis via either transvaginal ultrasound (TVUS) or MRI. Features suggestive of adenomyosis on MRI overlap with TVUS features, including uterine enlargement, anteroposterior myometrial asymmetry, T1- or T2-intense myometrial cysts or foci, and a thickened JZ.¹⁸ A JZ thicker than 12 mm has been thought to be predictive of adenomyosis, whereas a thickness of less than 8 mm is predictive of its absence, although the JZ may vary in thickness with the menstrual cycle.^19,20 A 2021 systematic review and meta-analysis comparing MRI diagnosis with histopathologic findings reported a pooled sensitivity and specificity of 60% and 96%, respectively.²¹ The reported range for sensitivity and specificity is wide: 70% to 93% for sensitivity and 67% to 93% for specificity.^22-24

Key TVUS features associated with adenomyosis were defined in 2015 in a consensus statement released by the Morphological Uterus Sonographic Assessment (MUSA) group.²⁵ These include a globally enlarged uterus, anteroposterior myometrial asymmetry, myometrial cysts, fan-shaped shadowing, mixed myometrial echogenicity, translesional vascularity, echogenic subendometrial lines and buds, and a thickened, irregular or discontinuous JZ (FIGURES 3 and 4).²⁵ The accuracy of ultrasonographic diagnosis of adenomyosis using these features has been investigated in multiple systematic reviews and meta-analyses, most recently by Liu and colleagues who found a pooled sensitivity of TVUS of 81% and pooled specificity of 87%.²³ The range for ultrasonographic sensitivity and specificity is wide, however, ranging from 33% to 84% for sensitivity and 64% to 100% for specificity.²² Consensus is lacking as to which TVUS features are most predictive of adenomyosis, but in general, the combination of multiple MUSA criteria (particularly myometrial cysts and irregular JZ on 3D imaging) appears to be more accurate than any one feature alone.²³ The presence of fibroids may decrease the sensitivity of TVUS, and one study suggested elastography may increase the accuracy of TVUS.^24,26 Moreover, given that most radiologists receive limited training on the MUSA criteria, it behooves gynecologists to become familiar with these sonographic features to be able to identify adenomyosis in our patients.

Clinical presentation

While many women who are later diagnosed with adenomyosis are asymptomatic, the disease can present with heavy menstrual bleeding and dysmenorrhea, which occur in 50% and 30% of patients, respectively.²⁸ Other symptoms include dyspareunia and infertility. Symptoms were previously reported to develop between the ages of 40 and 50 years; however, this is biased by diagnosis at the time of hysterectomy and the fact that younger patients are less likely to undergo definitive surgery. When using imaging criteria for diagnosis, adenomyosis might be more responsible for dysmenorrhea and chronic pelvic pain in younger patients than previously appreciated.^1,29 In a recent study reviewing TVUS in 270 adolescents for any reason, adenomyosis was present in 5% of cases and this increased up to 44% in the presence of endometriosis.³⁰

Adenomyosis often co-exists and shares similar clinical presentations with other gynecologic pathologies such as endometriosis and fibroids, making diagnosis on symptomatology alone challenging. Concurrent adenomyosis has been found in up to 73% and 57% of patients with suspected or diagnosed endometriosis and fibroids, respectively.^31,32 Accumulating evidence suggests that pelvic pain previously attributed to endometriosis may in fact be a result of adenomyosis; for example, persistent pelvic pain after optimal resection of endometriosis may be confounded by the presence of adenomyosis.²⁹ In one study of 155 patients with complete resection of deep infiltrating endometriosis, persistent pelvic pain was significantly associated with the presence of adenomyosis on imaging.³³

Adenomyosis is increasingly being recognized at the time of infertility evaluation with an estimated prevalence of 30% in women with infertility.³ Among women with infertility, adenomyosis has been associated with a lower clinical pregnancy rate, higher miscarriage rate, and lower live birth rate, as well as obstetric complications such as abnormal placentation.^34-36 A study of 37 baboons found the histologic diagnosis of adenomyosis alone at necropsy was associated with a 20-fold increased risk of lifelong infertility (odds ratio [OR], 20.1; 95% CI, 2.1-921), whereas presence of endometriosis was associated with a nonsignificant 3-fold risk of lifelong infertility (OR, 3.6; 95% CI, 0.9-15.8).³⁷

In women with endometriosis and infertility, co-existing adenomyosis portends worse fertility outcomes. In a retrospective study of 244 women who underwent endometriosis surgery, more than five features of adenomyosis on imaging was associated with higher rates of infertility, in vitro fertilization treatments, and a higher number of in vitro fertilization cycles.³¹ Moreover, in women who underwent surgery for deep infiltrating endometriosis, the presence of adenomyosis on imaging was associated with a 68% reduction in likelihood of pregnancy after surgery.³⁸

Conclusion

As we begin to learn about adenomyosis, our misconceptions become more evident. The notion that it largely affects women at the end of their reproductive lives is biased by using histopathology at hysterectomy as the gold standard for diagnosis. Lack of definitive histologic or imaging criteria and biopsy techniques add to the diagnostic challenge. This in turn leads to inaccurate estimates of incidence and prevalence, as we assume patients’ symptoms must be attributable to what we can see at the time of surgery (for example, Stage I or II endometriosis), rather than what we cannot see. We now know that adenomyosis is present in women of all ages, including adolescents, and can significantly contribute to reduced fertility and quality of life. We owe it to our patients to consider this condition in the differential diagnosis of dysmenorrhea, heavy menstrual bleeding, dyspareunia, and infertility.

CASE Resolved

The patient underwent targeted hysteroscopic resection of adenomyosis (FIGURE 5) and conceived spontaneously the following year. ●

“We were all of us cogs in a great machine which sometimes rolled forward, nobody knew where, sometimes backwards, nobody knew why.” – Ernst Toller

A nice feature of the Apple watch is the stopwatch. With it, I can discreetly click the timer and watch seconds tick away. Tap. There’s one lap. Tap. Two. Tap. That was a quick visit, 6 minutes and 42 seconds. Tap. Under 2 minutes to close the chart. Let’s see if I can beat it. Tap. Tap. What if I moved my Mayo stand over to this side of the room? How about a sign, “All patients must have clothes off if you want a skin exam.” You think ob.gyns. are quick from skin to baby in a stat C-section? You should see how fast I can go from alcohol wipe to Drysol on a biopsy. Seconds. Tick, tick, tap.

Every day I look for ways to go faster. This is not so I can be out the door by 3. Rather, it’s simply to make it through the day without having to log on after we put the kids to bed at night.

Speaking of bedtimes, another nice feature of the Apple watch is the timer. With it, I can set a timer and a lovely chimey alarm will go off. This comes in handy with 3-year-olds. “Sloan, in two minutes we are going to brush your teeth.” Ding. “Sloan, you have one minute to get your pajamas on.” Ding. “Sloanie, I’ll give you 3 more minutes to put the kitties away, then get into bed.” Ding, ding, ding ...

As you can see, using the stopwatch to time a bedtime routine would be demoralizing. If you’ve tried to put a toddler to bed in summer you know. They explore every option to avoid sleeping: one more book (that would make 3), “accidentally” putting their pajamas on backwards, offering to brush their teeth a second time. And once the light is off, “Papa, I have to potty.” No, bedtime routines cannot be standardized. They resist being made efficient.

In contrast, we think of seeing patients as a standardizable process; work to be optimized. This idea that work should be as efficient as possible came from the father of business management, Frederick Taylor. Taylor, a mechanical engineer, observed inefficiencies on the factory floor. His work was seminal in the development of the second industrial revolution. Before then no one had applied scientific rigor to productivity. His book, “The Principles of Scientific Management,” written in 1909, is considered the most influential management book of the 20th century. He was the first to use stopwatches to perform time studies, noting how long each task took with the belief that there was one best way. The worker was an extension of the machine, tuned by management such that he was as efficient as possible.

PublicDomain/commons.wikimedia.org/wiki/File:Ford_assembly_line_-_1913.jpg

A more insidious downside on the drive to efficiency lies in the nature of what we do. We aren’t factory workers punching out widgets, we’re physicians caring for people and people cannot be standardized. In this way, seeing patients is more like putting a toddler to bed than like assembling an iPhone. There will always be by-the-ways, basal cells hiding behind the ear, traffic jams, and bags of products that they want to review. Not sure how to use your fluorouracil? Let’s go over it again. Need to talk more about why you have granuloma annulare? Let me explain. Despite Taylor’s vision, some work simply cannot be optimized. And shouldn’t.

“Where’s my 11:30 patient who checked in half an hour ago?!” I asked my medical assistant. “Oh, she had to go to the bathroom.” Tap.
 

Dr. Benabio is director of Healthcare Transformation and chief of dermatology at Kaiser Permanente San Diego. The opinions expressed in this column are his own and do not represent those of Kaiser Permanente. Dr. Benabio is @Dermdoc on Twitter. Write to him at [email protected].

“We were all of us cogs in a great machine which sometimes rolled forward, nobody knew where, sometimes backwards, nobody knew why.” – Ernst Toller

A nice feature of the Apple watch is the stopwatch. With it, I can discreetly click the timer and watch seconds tick away. Tap. There’s one lap. Tap. Two. Tap. That was a quick visit, 6 minutes and 42 seconds. Tap. Under 2 minutes to close the chart. Let’s see if I can beat it. Tap. Tap. What if I moved my Mayo stand over to this side of the room? How about a sign, “All patients must have clothes off if you want a skin exam.” You think ob.gyns. are quick from skin to baby in a stat C-section? You should see how fast I can go from alcohol wipe to Drysol on a biopsy. Seconds. Tick, tick, tap.

Every day I look for ways to go faster. This is not so I can be out the door by 3. Rather, it’s simply to make it through the day without having to log on after we put the kids to bed at night.

Speaking of bedtimes, another nice feature of the Apple watch is the timer. With it, I can set a timer and a lovely chimey alarm will go off. This comes in handy with 3-year-olds. “Sloan, in two minutes we are going to brush your teeth.” Ding. “Sloan, you have one minute to get your pajamas on.” Ding. “Sloanie, I’ll give you 3 more minutes to put the kitties away, then get into bed.” Ding, ding, ding ...

As you can see, using the stopwatch to time a bedtime routine would be demoralizing. If you’ve tried to put a toddler to bed in summer you know. They explore every option to avoid sleeping: one more book (that would make 3), “accidentally” putting their pajamas on backwards, offering to brush their teeth a second time. And once the light is off, “Papa, I have to potty.” No, bedtime routines cannot be standardized. They resist being made efficient.

In contrast, we think of seeing patients as a standardizable process; work to be optimized. This idea that work should be as efficient as possible came from the father of business management, Frederick Taylor. Taylor, a mechanical engineer, observed inefficiencies on the factory floor. His work was seminal in the development of the second industrial revolution. Before then no one had applied scientific rigor to productivity. His book, “The Principles of Scientific Management,” written in 1909, is considered the most influential management book of the 20th century. He was the first to use stopwatches to perform time studies, noting how long each task took with the belief that there was one best way. The worker was an extension of the machine, tuned by management such that he was as efficient as possible.

PublicDomain/commons.wikimedia.org/wiki/File:Ford_assembly_line_-_1913.jpg

A more insidious downside on the drive to efficiency lies in the nature of what we do. We aren’t factory workers punching out widgets, we’re physicians caring for people and people cannot be standardized. In this way, seeing patients is more like putting a toddler to bed than like assembling an iPhone. There will always be by-the-ways, basal cells hiding behind the ear, traffic jams, and bags of products that they want to review. Not sure how to use your fluorouracil? Let’s go over it again. Need to talk more about why you have granuloma annulare? Let me explain. Despite Taylor’s vision, some work simply cannot be optimized. And shouldn’t.

“Where’s my 11:30 patient who checked in half an hour ago?!” I asked my medical assistant. “Oh, she had to go to the bathroom.” Tap.
 

Dr. Benabio is director of Healthcare Transformation and chief of dermatology at Kaiser Permanente San Diego. The opinions expressed in this column are his own and do not represent those of Kaiser Permanente. Dr. Benabio is @Dermdoc on Twitter. Write to him at [email protected].

“We were all of us cogs in a great machine which sometimes rolled forward, nobody knew where, sometimes backwards, nobody knew why.” – Ernst Toller

A nice feature of the Apple watch is the stopwatch. With it, I can discreetly click the timer and watch seconds tick away. Tap. There’s one lap. Tap. Two. Tap. That was a quick visit, 6 minutes and 42 seconds. Tap. Under 2 minutes to close the chart. Let’s see if I can beat it. Tap. Tap. What if I moved my Mayo stand over to this side of the room? How about a sign, “All patients must have clothes off if you want a skin exam.” You think ob.gyns. are quick from skin to baby in a stat C-section? You should see how fast I can go from alcohol wipe to Drysol on a biopsy. Seconds. Tick, tick, tap.

Every day I look for ways to go faster. This is not so I can be out the door by 3. Rather, it’s simply to make it through the day without having to log on after we put the kids to bed at night.

Speaking of bedtimes, another nice feature of the Apple watch is the timer. With it, I can set a timer and a lovely chimey alarm will go off. This comes in handy with 3-year-olds. “Sloan, in two minutes we are going to brush your teeth.” Ding. “Sloan, you have one minute to get your pajamas on.” Ding. “Sloanie, I’ll give you 3 more minutes to put the kitties away, then get into bed.” Ding, ding, ding ...

As you can see, using the stopwatch to time a bedtime routine would be demoralizing. If you’ve tried to put a toddler to bed in summer you know. They explore every option to avoid sleeping: one more book (that would make 3), “accidentally” putting their pajamas on backwards, offering to brush their teeth a second time. And once the light is off, “Papa, I have to potty.” No, bedtime routines cannot be standardized. They resist being made efficient.

In contrast, we think of seeing patients as a standardizable process; work to be optimized. This idea that work should be as efficient as possible came from the father of business management, Frederick Taylor. Taylor, a mechanical engineer, observed inefficiencies on the factory floor. His work was seminal in the development of the second industrial revolution. Before then no one had applied scientific rigor to productivity. His book, “The Principles of Scientific Management,” written in 1909, is considered the most influential management book of the 20th century. He was the first to use stopwatches to perform time studies, noting how long each task took with the belief that there was one best way. The worker was an extension of the machine, tuned by management such that he was as efficient as possible.

PublicDomain/commons.wikimedia.org/wiki/File:Ford_assembly_line_-_1913.jpg

A more insidious downside on the drive to efficiency lies in the nature of what we do. We aren’t factory workers punching out widgets, we’re physicians caring for people and people cannot be standardized. In this way, seeing patients is more like putting a toddler to bed than like assembling an iPhone. There will always be by-the-ways, basal cells hiding behind the ear, traffic jams, and bags of products that they want to review. Not sure how to use your fluorouracil? Let’s go over it again. Need to talk more about why you have granuloma annulare? Let me explain. Despite Taylor’s vision, some work simply cannot be optimized. And shouldn’t.

“Where’s my 11:30 patient who checked in half an hour ago?!” I asked my medical assistant. “Oh, she had to go to the bathroom.” Tap.
 

Dr. Benabio is director of Healthcare Transformation and chief of dermatology at Kaiser Permanente San Diego. The opinions expressed in this column are his own and do not represent those of Kaiser Permanente. Dr. Benabio is @Dermdoc on Twitter. Write to him at [email protected].

Dual antiplatelet therapy (DAPT) consisting of aspirin plus a P2Y₁₂ inhibitor has been the standard of care to prevent thrombotic events in patients with acute coronary syndrome (ACS) undergoing percutaneous coronary intervention (PCI).

A new pilot study suggests that aspirin can be discontinued on the day after the PCI, and colchicine, an anti-inflammatory agent, could be added to reduce the risk for ischemic events in these patients, while mitigating the increased bleeding risk associated with aspirin.

Investigators conducted a pilot trial in ACS patients treated with drug-eluting stents (DES) who received low-dose colchicine the day after PCI, together with P2Y₁₂ inhibitor (ticagrelor or prasugrel) maintenance therapy. Aspirin use was discontinued.

At 3 months, only 1% of the patients experienced stent thrombosis, and only 1 patient showed high platelet reactivity. Moreover, at 1 month, high-sensitivity C-reactive protein (hs-CRP) and platelet reactivity both decreased, pointing to reduced inflammation.

“In ACS patients undergoing PCI, it is feasible to discontinue aspirin therapy and administer low-dose colchicine on the day after PCI in addition to ticagrelor or prasugrel P2Y₁₂ inhibitors,” write Seung-Yul Lee, MD, CHA Bundang Medical Center, CHA University, Seongnam, South Korea, and colleagues. “This approach is associated with favorable platelet function and inflammatory profiles.”

The study was published online in JACC: Cardiovascular Interventions.
 

Safety without compromised efficacy

The U.S. Food and Drug Administration recently approved colchicine 0.5-mg tablets (Lodoco, Agepha Pharma) as the first anti-inflammatory drug shown to reduce the risk for myocardial infarction, stroke, coronary revascularization, and cardiovascular death in adult patients with either established atherosclerotic disease or multiple risk factors for cardiovascular disease. It targets residual inflammation as an underlying cause of cardiovascular events.

Patients after PCI are generally treated using DAPT, but given the risk for increased bleeding associated with aspirin – especially when used long-term – there is a “need to identify strategies associated with a more favorable safety profile without compromising efficacy,” the authors write.

Previous research has yielded mixed results in terms of the discontinuation of aspirin therapy after 1-3 months and maintenance on P2Y₁₂ inhibitor monotherapy. But one trial found colchicine to be effective in reducing recurrent ischemia, and its benefits may be more beneficial with early initiation in the hospital.

In this new study, researchers tested a “strategy that substitutes aspirin with colchicine during the acute phase to maximize the treatment effect of reducing recurrent ischemia and bleeding,” they write. The Mono Antiplatelet and Colchicine Therapy (MACT) single-arm, open-label proof-of-concept study was designed to investigate this approach.

The researchers studied 200 patients with non–ST-segment elevation ACS and ST-segment elevation myocardial infarction (STEMI) who underwent PCI with DES (mean [SD] age, 61.4 [10.7] years; 90% male; 100% of Asian ethnicity), who were receiving either ticagrelor or prasugrel plus a loading dose of aspirin.

On the day after PCI, aspirin was discontinued, and low-dose colchicine (0.6 mg once daily) was administered in addition to the P2Y₁₂ inhibitor. In the case of staged PCI, it was performed under the maintenance of colchicine and ticagrelor or prasugrel.

No other antiplatelet or anticoagulant agents were permitted.

Patients underwent platelet function testing using the VerifyNow P2Y₁₂ assay before discharge. Levels of hs-CRP were measured at admission, at 24 and 48 hours after PCI, and at 1-month follow-up. Clinical follow-up was performed at 1 and at 3 months.

The primary outcome was stent thrombosis within 3 months of follow-up. Secondary outcomes included all-cause mortality, MI, revascularization, major bleeding, a composite of cardiac death, target vessel MI, or target lesion revascularization, P2Y₁₂ reaction units (PRUs), and change in hs-CRP levels between 24 hours post-PCI and 1-month follow-up.
 

The role of inflammation

Of the original 200 patients, 190 completed the full protocol and were available for follow-up.

The primary outcome occurred in only two patients. It turned out that one of the patients had not been adherent with antiplatelet medications.

“Although bleeding occurred in 36 patients, major bleeding occurred in only 1 patient,” the authors report.

The level of platelet reactivity at discharge was 27 ± 42 PRUs. Most patients (91%) met the criteria for low platelet reactivity, while only 0.5% met the criteria for high platelet reactivity. Platelet reactivity was similar, regardless of which P2Y₁₂ inhibitor (ticagrelor or prasugrel) the patients were taking.

In all patients, the level of inflammation was “reduced considerably” over time: After 1 month, the hs-CRP level decreased from 6.1 mg/L (interquartile range [IQR], 2.6-15.9 mg/L) at 24 hours after PCI to 0.6 mg/L (IQR, 0.4-1.2 mg/L; P < .001).

The prevalence of high-inflammation criteria, defined as hs-CRP ≥ 2 mg/L, decreased significantly, from 81.8% at 24 hours after PCI to 11.8% at 1 month (P < .001).

Major bleeding was rare, they report, with a 3-month incidence of 0.5%.

“Inflammation plays a fundamental role in the development and progression of the atherothrombotic process,” the authors explain. A series of factors also trigger “an intense inflammatory response” in the acute phase of MI, which may lead to adverse myocardial remodeling. In the present study, inflammatory levels were rapidly reduced.

They noted several limitations. For example, all enrolled patients were Asian and were at relatively low bleeding and ischemic risk. “Although ticagrelor or prasugrel is effective regardless of ethnicity, clinical data supporting this de-escalation strategy are limited,” they state. Additionally, there was no control group for comparison.

The findings warrant further investigation, they conclude.
 

Promising but preliminary

Commenting for this news organization, Francesco Costa, MD, PhD, interventional cardiologist and assistant professor, University of Messina, Sicily, Italy, said he thinks it’s “too early for extensive clinical translation of these findings.”

Rather, larger and more extensive randomized trials are “on their way to give more precise estimates regarding the risks and benefits of early aspirin withdrawal in ACS.”

However, added Dr. Costa, who was not involved with the current research, “in this setting, adding colchicine early looks very promising to mitigate potential thrombotic risk without increasing bleeding risk.”

In the meantime, the study “provides novel insights on early aspirin withdrawal and P2Y₁₂ monotherapy in an unselected population, including [those with] STEMI,” said Dr. Costa, also the coauthor of an accompanying editorial. The findings “could be of particular interest for those patients at extremely high bleeding risk or who are truly intolerant to aspirin, a scenario in which options are limited.”

This study was supported by the Cardiovascular Research Center, Seoul, South Korea. Dr. Lee reports no relevant financial relationships. The other authors’ disclosures are listed on the original paper. Dr. Costa has served on an advisory board for AstraZeneca and has received speaker fees from Chiesi Farmaceutici. His coauthor reports no relevant financial relationships.

A version of this article appeared on Medscape.com.

Dual antiplatelet therapy (DAPT) consisting of aspirin plus a P2Y₁₂ inhibitor has been the standard of care to prevent thrombotic events in patients with acute coronary syndrome (ACS) undergoing percutaneous coronary intervention (PCI).

A new pilot study suggests that aspirin can be discontinued on the day after the PCI, and colchicine, an anti-inflammatory agent, could be added to reduce the risk for ischemic events in these patients, while mitigating the increased bleeding risk associated with aspirin.

Investigators conducted a pilot trial in ACS patients treated with drug-eluting stents (DES) who received low-dose colchicine the day after PCI, together with P2Y₁₂ inhibitor (ticagrelor or prasugrel) maintenance therapy. Aspirin use was discontinued.

At 3 months, only 1% of the patients experienced stent thrombosis, and only 1 patient showed high platelet reactivity. Moreover, at 1 month, high-sensitivity C-reactive protein (hs-CRP) and platelet reactivity both decreased, pointing to reduced inflammation.

“In ACS patients undergoing PCI, it is feasible to discontinue aspirin therapy and administer low-dose colchicine on the day after PCI in addition to ticagrelor or prasugrel P2Y₁₂ inhibitors,” write Seung-Yul Lee, MD, CHA Bundang Medical Center, CHA University, Seongnam, South Korea, and colleagues. “This approach is associated with favorable platelet function and inflammatory profiles.”

The study was published online in JACC: Cardiovascular Interventions.
 

Safety without compromised efficacy

The U.S. Food and Drug Administration recently approved colchicine 0.5-mg tablets (Lodoco, Agepha Pharma) as the first anti-inflammatory drug shown to reduce the risk for myocardial infarction, stroke, coronary revascularization, and cardiovascular death in adult patients with either established atherosclerotic disease or multiple risk factors for cardiovascular disease. It targets residual inflammation as an underlying cause of cardiovascular events.

Patients after PCI are generally treated using DAPT, but given the risk for increased bleeding associated with aspirin – especially when used long-term – there is a “need to identify strategies associated with a more favorable safety profile without compromising efficacy,” the authors write.

Previous research has yielded mixed results in terms of the discontinuation of aspirin therapy after 1-3 months and maintenance on P2Y₁₂ inhibitor monotherapy. But one trial found colchicine to be effective in reducing recurrent ischemia, and its benefits may be more beneficial with early initiation in the hospital.

In this new study, researchers tested a “strategy that substitutes aspirin with colchicine during the acute phase to maximize the treatment effect of reducing recurrent ischemia and bleeding,” they write. The Mono Antiplatelet and Colchicine Therapy (MACT) single-arm, open-label proof-of-concept study was designed to investigate this approach.

The researchers studied 200 patients with non–ST-segment elevation ACS and ST-segment elevation myocardial infarction (STEMI) who underwent PCI with DES (mean [SD] age, 61.4 [10.7] years; 90% male; 100% of Asian ethnicity), who were receiving either ticagrelor or prasugrel plus a loading dose of aspirin.

On the day after PCI, aspirin was discontinued, and low-dose colchicine (0.6 mg once daily) was administered in addition to the P2Y₁₂ inhibitor. In the case of staged PCI, it was performed under the maintenance of colchicine and ticagrelor or prasugrel.

No other antiplatelet or anticoagulant agents were permitted.

Patients underwent platelet function testing using the VerifyNow P2Y₁₂ assay before discharge. Levels of hs-CRP were measured at admission, at 24 and 48 hours after PCI, and at 1-month follow-up. Clinical follow-up was performed at 1 and at 3 months.

The primary outcome was stent thrombosis within 3 months of follow-up. Secondary outcomes included all-cause mortality, MI, revascularization, major bleeding, a composite of cardiac death, target vessel MI, or target lesion revascularization, P2Y₁₂ reaction units (PRUs), and change in hs-CRP levels between 24 hours post-PCI and 1-month follow-up.
 

The role of inflammation

Of the original 200 patients, 190 completed the full protocol and were available for follow-up.

The primary outcome occurred in only two patients. It turned out that one of the patients had not been adherent with antiplatelet medications.

“Although bleeding occurred in 36 patients, major bleeding occurred in only 1 patient,” the authors report.

The level of platelet reactivity at discharge was 27 ± 42 PRUs. Most patients (91%) met the criteria for low platelet reactivity, while only 0.5% met the criteria for high platelet reactivity. Platelet reactivity was similar, regardless of which P2Y₁₂ inhibitor (ticagrelor or prasugrel) the patients were taking.

In all patients, the level of inflammation was “reduced considerably” over time: After 1 month, the hs-CRP level decreased from 6.1 mg/L (interquartile range [IQR], 2.6-15.9 mg/L) at 24 hours after PCI to 0.6 mg/L (IQR, 0.4-1.2 mg/L; P < .001).

The prevalence of high-inflammation criteria, defined as hs-CRP ≥ 2 mg/L, decreased significantly, from 81.8% at 24 hours after PCI to 11.8% at 1 month (P < .001).

Major bleeding was rare, they report, with a 3-month incidence of 0.5%.

“Inflammation plays a fundamental role in the development and progression of the atherothrombotic process,” the authors explain. A series of factors also trigger “an intense inflammatory response” in the acute phase of MI, which may lead to adverse myocardial remodeling. In the present study, inflammatory levels were rapidly reduced.

They noted several limitations. For example, all enrolled patients were Asian and were at relatively low bleeding and ischemic risk. “Although ticagrelor or prasugrel is effective regardless of ethnicity, clinical data supporting this de-escalation strategy are limited,” they state. Additionally, there was no control group for comparison.

The findings warrant further investigation, they conclude.
 

Promising but preliminary

Commenting for this news organization, Francesco Costa, MD, PhD, interventional cardiologist and assistant professor, University of Messina, Sicily, Italy, said he thinks it’s “too early for extensive clinical translation of these findings.”

Rather, larger and more extensive randomized trials are “on their way to give more precise estimates regarding the risks and benefits of early aspirin withdrawal in ACS.”

However, added Dr. Costa, who was not involved with the current research, “in this setting, adding colchicine early looks very promising to mitigate potential thrombotic risk without increasing bleeding risk.”

In the meantime, the study “provides novel insights on early aspirin withdrawal and P2Y₁₂ monotherapy in an unselected population, including [those with] STEMI,” said Dr. Costa, also the coauthor of an accompanying editorial. The findings “could be of particular interest for those patients at extremely high bleeding risk or who are truly intolerant to aspirin, a scenario in which options are limited.”

This study was supported by the Cardiovascular Research Center, Seoul, South Korea. Dr. Lee reports no relevant financial relationships. The other authors’ disclosures are listed on the original paper. Dr. Costa has served on an advisory board for AstraZeneca and has received speaker fees from Chiesi Farmaceutici. His coauthor reports no relevant financial relationships.

A version of this article appeared on Medscape.com.

Dual antiplatelet therapy (DAPT) consisting of aspirin plus a P2Y₁₂ inhibitor has been the standard of care to prevent thrombotic events in patients with acute coronary syndrome (ACS) undergoing percutaneous coronary intervention (PCI).

A new pilot study suggests that aspirin can be discontinued on the day after the PCI, and colchicine, an anti-inflammatory agent, could be added to reduce the risk for ischemic events in these patients, while mitigating the increased bleeding risk associated with aspirin.

Investigators conducted a pilot trial in ACS patients treated with drug-eluting stents (DES) who received low-dose colchicine the day after PCI, together with P2Y₁₂ inhibitor (ticagrelor or prasugrel) maintenance therapy. Aspirin use was discontinued.

At 3 months, only 1% of the patients experienced stent thrombosis, and only 1 patient showed high platelet reactivity. Moreover, at 1 month, high-sensitivity C-reactive protein (hs-CRP) and platelet reactivity both decreased, pointing to reduced inflammation.

“In ACS patients undergoing PCI, it is feasible to discontinue aspirin therapy and administer low-dose colchicine on the day after PCI in addition to ticagrelor or prasugrel P2Y₁₂ inhibitors,” write Seung-Yul Lee, MD, CHA Bundang Medical Center, CHA University, Seongnam, South Korea, and colleagues. “This approach is associated with favorable platelet function and inflammatory profiles.”

The study was published online in JACC: Cardiovascular Interventions.
 

Safety without compromised efficacy

The U.S. Food and Drug Administration recently approved colchicine 0.5-mg tablets (Lodoco, Agepha Pharma) as the first anti-inflammatory drug shown to reduce the risk for myocardial infarction, stroke, coronary revascularization, and cardiovascular death in adult patients with either established atherosclerotic disease or multiple risk factors for cardiovascular disease. It targets residual inflammation as an underlying cause of cardiovascular events.

Patients after PCI are generally treated using DAPT, but given the risk for increased bleeding associated with aspirin – especially when used long-term – there is a “need to identify strategies associated with a more favorable safety profile without compromising efficacy,” the authors write.

Previous research has yielded mixed results in terms of the discontinuation of aspirin therapy after 1-3 months and maintenance on P2Y₁₂ inhibitor monotherapy. But one trial found colchicine to be effective in reducing recurrent ischemia, and its benefits may be more beneficial with early initiation in the hospital.

In this new study, researchers tested a “strategy that substitutes aspirin with colchicine during the acute phase to maximize the treatment effect of reducing recurrent ischemia and bleeding,” they write. The Mono Antiplatelet and Colchicine Therapy (MACT) single-arm, open-label proof-of-concept study was designed to investigate this approach.

The researchers studied 200 patients with non–ST-segment elevation ACS and ST-segment elevation myocardial infarction (STEMI) who underwent PCI with DES (mean [SD] age, 61.4 [10.7] years; 90% male; 100% of Asian ethnicity), who were receiving either ticagrelor or prasugrel plus a loading dose of aspirin.

On the day after PCI, aspirin was discontinued, and low-dose colchicine (0.6 mg once daily) was administered in addition to the P2Y₁₂ inhibitor. In the case of staged PCI, it was performed under the maintenance of colchicine and ticagrelor or prasugrel.

No other antiplatelet or anticoagulant agents were permitted.

Patients underwent platelet function testing using the VerifyNow P2Y₁₂ assay before discharge. Levels of hs-CRP were measured at admission, at 24 and 48 hours after PCI, and at 1-month follow-up. Clinical follow-up was performed at 1 and at 3 months.

The primary outcome was stent thrombosis within 3 months of follow-up. Secondary outcomes included all-cause mortality, MI, revascularization, major bleeding, a composite of cardiac death, target vessel MI, or target lesion revascularization, P2Y₁₂ reaction units (PRUs), and change in hs-CRP levels between 24 hours post-PCI and 1-month follow-up.
 

The role of inflammation

Of the original 200 patients, 190 completed the full protocol and were available for follow-up.

The primary outcome occurred in only two patients. It turned out that one of the patients had not been adherent with antiplatelet medications.

“Although bleeding occurred in 36 patients, major bleeding occurred in only 1 patient,” the authors report.

The level of platelet reactivity at discharge was 27 ± 42 PRUs. Most patients (91%) met the criteria for low platelet reactivity, while only 0.5% met the criteria for high platelet reactivity. Platelet reactivity was similar, regardless of which P2Y₁₂ inhibitor (ticagrelor or prasugrel) the patients were taking.

In all patients, the level of inflammation was “reduced considerably” over time: After 1 month, the hs-CRP level decreased from 6.1 mg/L (interquartile range [IQR], 2.6-15.9 mg/L) at 24 hours after PCI to 0.6 mg/L (IQR, 0.4-1.2 mg/L; P < .001).

The prevalence of high-inflammation criteria, defined as hs-CRP ≥ 2 mg/L, decreased significantly, from 81.8% at 24 hours after PCI to 11.8% at 1 month (P < .001).

Major bleeding was rare, they report, with a 3-month incidence of 0.5%.

“Inflammation plays a fundamental role in the development and progression of the atherothrombotic process,” the authors explain. A series of factors also trigger “an intense inflammatory response” in the acute phase of MI, which may lead to adverse myocardial remodeling. In the present study, inflammatory levels were rapidly reduced.

They noted several limitations. For example, all enrolled patients were Asian and were at relatively low bleeding and ischemic risk. “Although ticagrelor or prasugrel is effective regardless of ethnicity, clinical data supporting this de-escalation strategy are limited,” they state. Additionally, there was no control group for comparison.

The findings warrant further investigation, they conclude.
 

Promising but preliminary

Commenting for this news organization, Francesco Costa, MD, PhD, interventional cardiologist and assistant professor, University of Messina, Sicily, Italy, said he thinks it’s “too early for extensive clinical translation of these findings.”

Rather, larger and more extensive randomized trials are “on their way to give more precise estimates regarding the risks and benefits of early aspirin withdrawal in ACS.”

However, added Dr. Costa, who was not involved with the current research, “in this setting, adding colchicine early looks very promising to mitigate potential thrombotic risk without increasing bleeding risk.”

In the meantime, the study “provides novel insights on early aspirin withdrawal and P2Y₁₂ monotherapy in an unselected population, including [those with] STEMI,” said Dr. Costa, also the coauthor of an accompanying editorial. The findings “could be of particular interest for those patients at extremely high bleeding risk or who are truly intolerant to aspirin, a scenario in which options are limited.”

This study was supported by the Cardiovascular Research Center, Seoul, South Korea. Dr. Lee reports no relevant financial relationships. The other authors’ disclosures are listed on the original paper. Dr. Costa has served on an advisory board for AstraZeneca and has received speaker fees from Chiesi Farmaceutici. His coauthor reports no relevant financial relationships.

A version of this article appeared on Medscape.com.

The Food and Drug Administration has issued a warning letter to AstraZeneca over the pharmaceutical company’s advertising of the efficacy of a treatment for chronic obstructive pulmonary disease (COPD).

Promotional materials for the drug Breztri (budesonide/formoterol fumarate/glycopyrrolate inhaled) suggest that the drug has a positive effect on all-cause mortality for COPD patients, but the referenced clinical trial does not support that claim, the FDA letter states.

The FDA issued the warning letter on Aug. 4 and published the letter online on Aug. 15.

The sales aid highlights a 49% observed relative difference in time to all-cause mortality (ACM) over 1 year between Breztri and long-acting muscarinic antagonist/long-acting beta agonist (LAMA/LABA) inhalers.

Because of “statistical testing hierarchy failure” as well as confounding factors such as the removal of patients from inhaled corticosteroids (ICS) prior to entering the treatment arm of the trial, “no conclusions about the effect of Breztri on ACM can be drawn from the [clinical] trial,” the FDA wrote. “To date, no drug has been shown to improve ACM in COPD.”

The Breztri sales aid also states that there was a 20% reduction of severe exacerbations in patients using Breztri compared with patients using ICS/LABA. However, in the cited clinical trial, “the reduction in severe exacerbations was not statistically significant for patients treated with Breztri relative to comparator groups,” according to the FDA.

AstraZeneca has 15 working days from the receipt of the letter to respond in writing with “any plan for discontinuing use of such communications, or for ceasing distribution of Breztri,” the agency wrote.
 

A version of this article appeared on Medscape.com.

The Food and Drug Administration has issued a warning letter to AstraZeneca over the pharmaceutical company’s advertising of the efficacy of a treatment for chronic obstructive pulmonary disease (COPD).

Promotional materials for the drug Breztri (budesonide/formoterol fumarate/glycopyrrolate inhaled) suggest that the drug has a positive effect on all-cause mortality for COPD patients, but the referenced clinical trial does not support that claim, the FDA letter states.

The FDA issued the warning letter on Aug. 4 and published the letter online on Aug. 15.

The sales aid highlights a 49% observed relative difference in time to all-cause mortality (ACM) over 1 year between Breztri and long-acting muscarinic antagonist/long-acting beta agonist (LAMA/LABA) inhalers.

Because of “statistical testing hierarchy failure” as well as confounding factors such as the removal of patients from inhaled corticosteroids (ICS) prior to entering the treatment arm of the trial, “no conclusions about the effect of Breztri on ACM can be drawn from the [clinical] trial,” the FDA wrote. “To date, no drug has been shown to improve ACM in COPD.”

The Breztri sales aid also states that there was a 20% reduction of severe exacerbations in patients using Breztri compared with patients using ICS/LABA. However, in the cited clinical trial, “the reduction in severe exacerbations was not statistically significant for patients treated with Breztri relative to comparator groups,” according to the FDA.

AstraZeneca has 15 working days from the receipt of the letter to respond in writing with “any plan for discontinuing use of such communications, or for ceasing distribution of Breztri,” the agency wrote.
 

A version of this article appeared on Medscape.com.

The Food and Drug Administration has issued a warning letter to AstraZeneca over the pharmaceutical company’s advertising of the efficacy of a treatment for chronic obstructive pulmonary disease (COPD).

Promotional materials for the drug Breztri (budesonide/formoterol fumarate/glycopyrrolate inhaled) suggest that the drug has a positive effect on all-cause mortality for COPD patients, but the referenced clinical trial does not support that claim, the FDA letter states.

The FDA issued the warning letter on Aug. 4 and published the letter online on Aug. 15.

The sales aid highlights a 49% observed relative difference in time to all-cause mortality (ACM) over 1 year between Breztri and long-acting muscarinic antagonist/long-acting beta agonist (LAMA/LABA) inhalers.

Because of “statistical testing hierarchy failure” as well as confounding factors such as the removal of patients from inhaled corticosteroids (ICS) prior to entering the treatment arm of the trial, “no conclusions about the effect of Breztri on ACM can be drawn from the [clinical] trial,” the FDA wrote. “To date, no drug has been shown to improve ACM in COPD.”

The Breztri sales aid also states that there was a 20% reduction of severe exacerbations in patients using Breztri compared with patients using ICS/LABA. However, in the cited clinical trial, “the reduction in severe exacerbations was not statistically significant for patients treated with Breztri relative to comparator groups,” according to the FDA.

AstraZeneca has 15 working days from the receipt of the letter to respond in writing with “any plan for discontinuing use of such communications, or for ceasing distribution of Breztri,” the agency wrote.
 

A version of this article appeared on Medscape.com.

The Food and Drug Administration has approved palovarotene (Sohonos), the first-ever treatment for people with the rare and severely disabling bone condition fibrodysplasia ossificans progressiva (FOP).

Affecting roughly 400 people in the United States and 900 worldwide, FOP is an autosomal dominant condition in which bone develops in soft connective tissue areas of the body where it isn’t normally present (heterotopic ossification), such as the ligaments, tendons, and skeletal muscles. This leads to severe restriction in mobility and function, to the point that people lose the ability to feed or care for themselves. Most are completely disabled by age 30 years and median life expectancy is 56 years, with death often caused by bone formation around the rib cage restricting respiration.

Olivier Le Moal/Getty Images

“As a clinician caring for patients with FOP, I personally see the daily challenges and stresses that our patients and their families must contend with ... since the accumulation of heterotopic ossification in FOP is progressive, irreversible, and life altering. This medication is an important treatment option for our FOP community,” said endocrinologist Edward Hsiao, MD, professor of medicine at the University of California, San Francisco, in a statement from Ipsen.

Taken orally, palovarotene selectively targets the gamma subtype of retinoic acid receptors that regulate skeletal development and ectopic bone in the retinoid signaling pathway. The drug mediates interactions between these receptors, growth factors, and proteins within that pathway to reduce new abnormal bone formation.

It is now FDA approved for the treatment of FOP in female patients aged 8 years or older and male patients aged 10 years or older. The recommended dosing is 5 mg daily or weight-based equivalent for pediatric patients under 14 years of age, which can be modified or increased for flare-up symptoms. It is contraindicated during pregnancy.

The FDA approval was based on 18-month data from the phase 3, multicenter, open-label MOVE trial that included 107 adult and pediatric patients, over 10% of the world’s population with FOP. All received oral palovarotene and were compared with untreated individuals from a prior natural history study of the condition. The drug reduced annualized heterotopic ossification volume by 54%.

Side effects were typical of those seen with other systemic retinoid drugs, including mucocutaneous events such as dryness of the skin and mucous membranes, alopecia, drug eruption, rash, and pruritus, and musculoskeletal events, such as arthralgia and premature growth plate closure in growing children.

According to Dr. Hsiao, who was a MOVE investigator, the study “showed that Sohonos can decrease new heterotopic ossification, and that palovarotene can be tolerated by many patients with FOP. Sohonos is not for everyone. As with all medicines there are risks in this case especially for young children who may develop early growth plate closure. In addition, Sohonos has the same side effects as other retinoids.”

The FDA approval of palovarotene follows its rejection for marketing authorization in the European Union in July 2023.

Reached for comment, an Ipsen spokesperson said in an interview: “We reached the end of the regulatory process in the European Union for Sohonos and are disappointed the European Commission decided not to approved palovarotene for people with FOP in Europe.”

The company is developing another drug, fidrisertib, for treating FOP. A pivotal phase 2 trial for that drug is now recruiting patients. Asked where Ipsen might try to market fidrisertib, the spokesperson replied:“At this point, our focus is on the completion of the pivotal trial.”

Meanwhile, in the United States, the FOP community is celebrating the palovarotene approval. In a statement, Michelle Davis, executive director of the International Fibrodysplasia Ossificans Progressiva Association, said: “FOP is life altering to the individuals diagnosed and their families. There’s not a day that goes by where those impacted don’t worry about the debilitating physical pain of muscle that is replaced by bone, another joint locking, or the relentless emotional toll of losing the ability to do an activity they love, or hold a loved one close. ... The first treatment for FOP has been proven to reduce the volume of new abnormal bone growth, which may result in better health outcomes for people living with FOP.”

Ipsen is offering a patient support program to assist with education, coverage, and reimbursement (1-866-435-5677).

A version of this article appeared on Medscape.com.

The Food and Drug Administration has approved palovarotene (Sohonos), the first-ever treatment for people with the rare and severely disabling bone condition fibrodysplasia ossificans progressiva (FOP).

Affecting roughly 400 people in the United States and 900 worldwide, FOP is an autosomal dominant condition in which bone develops in soft connective tissue areas of the body where it isn’t normally present (heterotopic ossification), such as the ligaments, tendons, and skeletal muscles. This leads to severe restriction in mobility and function, to the point that people lose the ability to feed or care for themselves. Most are completely disabled by age 30 years and median life expectancy is 56 years, with death often caused by bone formation around the rib cage restricting respiration.

Olivier Le Moal/Getty Images

“As a clinician caring for patients with FOP, I personally see the daily challenges and stresses that our patients and their families must contend with ... since the accumulation of heterotopic ossification in FOP is progressive, irreversible, and life altering. This medication is an important treatment option for our FOP community,” said endocrinologist Edward Hsiao, MD, professor of medicine at the University of California, San Francisco, in a statement from Ipsen.

Taken orally, palovarotene selectively targets the gamma subtype of retinoic acid receptors that regulate skeletal development and ectopic bone in the retinoid signaling pathway. The drug mediates interactions between these receptors, growth factors, and proteins within that pathway to reduce new abnormal bone formation.

It is now FDA approved for the treatment of FOP in female patients aged 8 years or older and male patients aged 10 years or older. The recommended dosing is 5 mg daily or weight-based equivalent for pediatric patients under 14 years of age, which can be modified or increased for flare-up symptoms. It is contraindicated during pregnancy.

The FDA approval was based on 18-month data from the phase 3, multicenter, open-label MOVE trial that included 107 adult and pediatric patients, over 10% of the world’s population with FOP. All received oral palovarotene and were compared with untreated individuals from a prior natural history study of the condition. The drug reduced annualized heterotopic ossification volume by 54%.

Side effects were typical of those seen with other systemic retinoid drugs, including mucocutaneous events such as dryness of the skin and mucous membranes, alopecia, drug eruption, rash, and pruritus, and musculoskeletal events, such as arthralgia and premature growth plate closure in growing children.

According to Dr. Hsiao, who was a MOVE investigator, the study “showed that Sohonos can decrease new heterotopic ossification, and that palovarotene can be tolerated by many patients with FOP. Sohonos is not for everyone. As with all medicines there are risks in this case especially for young children who may develop early growth plate closure. In addition, Sohonos has the same side effects as other retinoids.”

The FDA approval of palovarotene follows its rejection for marketing authorization in the European Union in July 2023.

Reached for comment, an Ipsen spokesperson said in an interview: “We reached the end of the regulatory process in the European Union for Sohonos and are disappointed the European Commission decided not to approved palovarotene for people with FOP in Europe.”

The company is developing another drug, fidrisertib, for treating FOP. A pivotal phase 2 trial for that drug is now recruiting patients. Asked where Ipsen might try to market fidrisertib, the spokesperson replied:“At this point, our focus is on the completion of the pivotal trial.”

Meanwhile, in the United States, the FOP community is celebrating the palovarotene approval. In a statement, Michelle Davis, executive director of the International Fibrodysplasia Ossificans Progressiva Association, said: “FOP is life altering to the individuals diagnosed and their families. There’s not a day that goes by where those impacted don’t worry about the debilitating physical pain of muscle that is replaced by bone, another joint locking, or the relentless emotional toll of losing the ability to do an activity they love, or hold a loved one close. ... The first treatment for FOP has been proven to reduce the volume of new abnormal bone growth, which may result in better health outcomes for people living with FOP.”

Ipsen is offering a patient support program to assist with education, coverage, and reimbursement (1-866-435-5677).

A version of this article appeared on Medscape.com.

The Food and Drug Administration has approved palovarotene (Sohonos), the first-ever treatment for people with the rare and severely disabling bone condition fibrodysplasia ossificans progressiva (FOP).

Affecting roughly 400 people in the United States and 900 worldwide, FOP is an autosomal dominant condition in which bone develops in soft connective tissue areas of the body where it isn’t normally present (heterotopic ossification), such as the ligaments, tendons, and skeletal muscles. This leads to severe restriction in mobility and function, to the point that people lose the ability to feed or care for themselves. Most are completely disabled by age 30 years and median life expectancy is 56 years, with death often caused by bone formation around the rib cage restricting respiration.

Olivier Le Moal/Getty Images

“As a clinician caring for patients with FOP, I personally see the daily challenges and stresses that our patients and their families must contend with ... since the accumulation of heterotopic ossification in FOP is progressive, irreversible, and life altering. This medication is an important treatment option for our FOP community,” said endocrinologist Edward Hsiao, MD, professor of medicine at the University of California, San Francisco, in a statement from Ipsen.

Taken orally, palovarotene selectively targets the gamma subtype of retinoic acid receptors that regulate skeletal development and ectopic bone in the retinoid signaling pathway. The drug mediates interactions between these receptors, growth factors, and proteins within that pathway to reduce new abnormal bone formation.

It is now FDA approved for the treatment of FOP in female patients aged 8 years or older and male patients aged 10 years or older. The recommended dosing is 5 mg daily or weight-based equivalent for pediatric patients under 14 years of age, which can be modified or increased for flare-up symptoms. It is contraindicated during pregnancy.

The FDA approval was based on 18-month data from the phase 3, multicenter, open-label MOVE trial that included 107 adult and pediatric patients, over 10% of the world’s population with FOP. All received oral palovarotene and were compared with untreated individuals from a prior natural history study of the condition. The drug reduced annualized heterotopic ossification volume by 54%.

Side effects were typical of those seen with other systemic retinoid drugs, including mucocutaneous events such as dryness of the skin and mucous membranes, alopecia, drug eruption, rash, and pruritus, and musculoskeletal events, such as arthralgia and premature growth plate closure in growing children.

According to Dr. Hsiao, who was a MOVE investigator, the study “showed that Sohonos can decrease new heterotopic ossification, and that palovarotene can be tolerated by many patients with FOP. Sohonos is not for everyone. As with all medicines there are risks in this case especially for young children who may develop early growth plate closure. In addition, Sohonos has the same side effects as other retinoids.”

The FDA approval of palovarotene follows its rejection for marketing authorization in the European Union in July 2023.

Reached for comment, an Ipsen spokesperson said in an interview: “We reached the end of the regulatory process in the European Union for Sohonos and are disappointed the European Commission decided not to approved palovarotene for people with FOP in Europe.”

The company is developing another drug, fidrisertib, for treating FOP. A pivotal phase 2 trial for that drug is now recruiting patients. Asked where Ipsen might try to market fidrisertib, the spokesperson replied:“At this point, our focus is on the completion of the pivotal trial.”

Meanwhile, in the United States, the FOP community is celebrating the palovarotene approval. In a statement, Michelle Davis, executive director of the International Fibrodysplasia Ossificans Progressiva Association, said: “FOP is life altering to the individuals diagnosed and their families. There’s not a day that goes by where those impacted don’t worry about the debilitating physical pain of muscle that is replaced by bone, another joint locking, or the relentless emotional toll of losing the ability to do an activity they love, or hold a loved one close. ... The first treatment for FOP has been proven to reduce the volume of new abnormal bone growth, which may result in better health outcomes for people living with FOP.”

Ipsen is offering a patient support program to assist with education, coverage, and reimbursement (1-866-435-5677).

A version of this article appeared on Medscape.com.

Sunday night. Las Vegas. Jason Aldean had just started playing.

My wife and I were at the 2017 Route 91 Harvest Festival with three other couples; two of them were our close friends. We were sitting in the VIP section, a tented area right next to the stage. We started hearing what I was convinced were fireworks.

I’ve been in the Army for 20 some years. I’ve been deployed and shot at multiple times. But these shots were far away. And you don’t expect people to be shooting at you at a concert.

I was on the edge of the VIP area, so I could see around the corner of the tent. I looked up at the Mandalay Bay and saw the muzzle flash in the hotel window. That’s when I knew.

I screamed: “Somebody’s shooting at us! Everybody get down!”

It took a while for people to realize what was going on. When the first couple volleys sprayed into the crowd, nobody understood. But once enough people had been hit and dropped, everyone knew, and it was just mass exodus.

People screamed and ran everywhere. Some of them tried to jump over the front barrier so they could get underneath the stage. Others were trying to pick up loved ones who’d been shot.

The next 15 minutes are a little foggy. I was helping my wife and the people around us to get down. Funny things come back to you afterward. One of my friends was carrying a 16-ounce beer in his hand. Somebody’s shooting at him and he’s walking around with his beer like he’s afraid to put it down. It was so surreal.

We got everybody underneath the tent, and then we just sat there. There would be shooting and then a pause. You’d think it was over. And then there would be more shooting and another pause. It felt like it never was going to stop.

After a short period of time, somebody came in with an official badge, maybe FBI, who knows. They said: “Okay, everybody up. We’ve got to get you out of here.” So, we all got up and headed across the stage. The gate they were taking us to was in full view of the shooter, so it wasn’t very safe.

As I got up, I looked out at the field. Bodies were scattered everywhere. I’m a trauma surgeon by trade. I couldn’t just leave.

I told my two best friends to take my wife with them. My wife lost her mind at that point. She didn’t want me to run out on the field. But I had to. I saw the injured and they needed help. Another buddy and I jumped over the fence and started taking care of people.

The feeling of being out on the field was one of complete frustration. I was in sandals, shorts, and a t-shirt. We had no stretchers, no medical supplies, no nothing. I didn’t have a belt to use as a tourniquet. I didn’t even have a bandage.

Worse: We were seeing high-velocity gunshot wounds that I’ve seen for 20 years in the Army. I know how to take care of them. I know how to fix them. But there wasn’t a single thing I could do.

We had to get people off the field, so we started gathering up as many as we could. We didn’t know if we were going to get shot at again, so we were trying to hide behind things as we ran. Our main objective was just to get people to a place of safety.

A lot of it is a blur. But a few patients stick out in my mind.

A father and son. The father had been shot through the abdomen, exited out through his back. He was in severe pain and couldn’t walk.

A young girl shot in the arm. Her parents carrying her.

A group of people doing CPR on a young lady. She had a gunshot wound to the head or neck. She was obviously dead. But they were still doing chest compressions in the middle of the field. I had to say to them: “She’s dead. You can’t save her. You need to get off the field.” But they wouldn’t stop. We picked her up and took her out while they continued to do CPR.

Later, I realized I knew that woman. She was part of a group of friends that we would see at the festival. I hadn’t recognized her. I also didn’t know that my friend Marco was there. A month or 2 later, we figured out that he was one of the people doing CPR. And I was the guy who came up and said his friend was dead.

Some people were so badly injured we couldn’t lift them. We started tearing apart the fencing used to separate the crowd and slid sections of the barricades under the wounded to carry them. We also carried off a bunch of people who were dead.

We were moving patients to a covered bar area where we thought they would be safer. What we didn’t know was there was an ambulance rally point at the very far end of the field. Unfortunately, we had no idea it was there.

I saw a lot of other first responders out there, people from the fire department, corpsmen from the Navy, medics. I ran into an anesthesia provider and a series of nurses.

When we got everybody off the field, we started moving them into vehicles. People were bringing their trucks up. One guy even stole a truck so he could drive people to the ED. There wasn’t a lot of triage. We were just stacking whoever we could into the backs of these pickups.

I tried to help a nurse taking care of a lady who had been shot in the neck. She was sitting sort of half upright with the patient lying in her arms. When I reached to help her, she said: “You can’t move her.”

“We need to get her to the hospital,” I replied.

“This is the only position that this lady has an airway,” she said. “You’re going to have to move both of us together. If I move at all, she loses her airway.”

So, a group of us managed to slide something underneath and lift them into the back of a truck.

Loading the wounded went on for a while. And then, just like that, everybody was gone.

I walked back out onto this field which not too long ago held 30,000 people. It was as if aliens had just suddenly beamed everyone out.

There was stuff on the ground everywhere – blankets, clothing, single boots, wallets, purses. I walked past a food stand with food still cooking on the grill. There was a beer tap still running. It was the weirdest feeling I’d ever had in my life.

After that, things got a little crazy again. There had been a report of a second shooter, and no one knew if it was real or not. The police started herding a group of us across the street to the Tropicana. We were still trying to take cover as we walked there. We went past a big lion statue in front of one of the casinos. I have a picture from two years earlier of me sitting on the back of that lion. I remember thinking: Now I’m hunkered down behind the same lion hiding from a shooter. Times change.

They brought about 50 of us into a food court, which was closed. They wouldn’t tell us what was going on. And they wouldn’t let us leave. This went on for hours. Meanwhile, I had dropped my cell phone on the field, so my wife couldn’t get hold of me, and later she told me she assumed I’d been shot. I was just hoping that she was safe.

People were huddled together, crying, holding each other. Most were wearing Western concert–going stuff, which for a lot of them wasn’t very much clothing. The hotel eventually brought some blankets.

I was covered in blood. My shirt, shorts, and sandals were soaked. It was running down my legs. I couldn’t find anything to eat or drink. At one point, I sat down at a slot machine, put a hundred dollars in, and started playing slots. I didn’t know what else to do. It didn’t take me very long to lose it all.

Finally, I started looking for a way to get out. I checked all the exits, but there were security and police there. Then I ran into a guy who said he had found a fire exit. When we opened the fire door, there was a big security guard there, and he said: “You can’t leave.”

We said: “Try to stop us. We’re out of here.”

Another thing I’ll always remember – after I broke out of the Tropicana, I was low crawling through the bushes along the Strip toward my hotel. I got a block away and stood up to cross the street. I pushed the crosswalk button and waited. There were no cars, no people. I’ve just broken all the rules, violated police orders, and now I’m standing there waiting for a blinking light to allow me to cross the street!

I made it back to my hotel room around 3:30 or 4:00 in the morning. My wife was hysterical because I hadn’t been answering my cell phone. I came in, and she gave me a big hug, and I got in the shower. Our plane was leaving in a few hours, so we laid down, but didn’t sleep.

As we were getting ready to leave, my wife’s phone rang, and it was my number. A guy at the same hotel had found my phone on the field and called the “in case of emergency” number. So, I got my phone back.

It wasn’t easy to deal with the aftermath. It really affected everybody’s life. To this day, I’m particular about where we sit at concerts. My wife isn’t comfortable if she can’t see an exit. I now have a med bag in my car with tourniquets, pressure dressings, airway masks for CPR.

I’ll never forget that feeling of absolute frustration. That lady without an airway – I could’ve put a trach in her very quickly and made a difference. Were they able to keep her airway? Did she live?

The father and son – did the father make it? I have no idea what happened to any of them. Later, I went through and looked at the pictures of all the people who had died, but I couldn’t recognize anybody.

The hardest part was being there with my wife. I’ve been in places where people are shooting at you, in vehicles that are getting bombed. I’ve always believed that when it’s your time, it’s your time. If I get shot, well, okay, that happens. But if she got shot or my friends ... that would be really tough.

A year later, I gave a talk about it at a conference. I thought I had worked through everything. But all of those feelings, all of that helplessness, that anger, everything came roaring back to the surface again. They asked me how I deal with it, and I said: “Well ... poorly.” I’m the guy who sticks it in a box in the back of his brain, tucks it in and buries it with a bunch of other boxes, and hopes it never comes out again. But every once in a while, it does.

There were all kinds of people out on that field, some with medical training, some without, all determined to help, trying to get those injured people where they needed to be. In retrospect, it does make you feel good. Somebody was shooting at us, but people were still willing to stand up and risk their lives to help others.

We still talk with our friends about what happened that night. Over the years, it’s become less and less. But there’s still a text sent out every year on that day: “Today is the anniversary. Glad we’re all alive. Thanks for being our friends.”

Dr. Sebesta is a bariatric surgeon with MultiCare Health System in Tacoma, Wash.

A version of this article first appeared on Medscape.com.

Sunday night. Las Vegas. Jason Aldean had just started playing.

My wife and I were at the 2017 Route 91 Harvest Festival with three other couples; two of them were our close friends. We were sitting in the VIP section, a tented area right next to the stage. We started hearing what I was convinced were fireworks.

I’ve been in the Army for 20 some years. I’ve been deployed and shot at multiple times. But these shots were far away. And you don’t expect people to be shooting at you at a concert.

I was on the edge of the VIP area, so I could see around the corner of the tent. I looked up at the Mandalay Bay and saw the muzzle flash in the hotel window. That’s when I knew.

I screamed: “Somebody’s shooting at us! Everybody get down!”

It took a while for people to realize what was going on. When the first couple volleys sprayed into the crowd, nobody understood. But once enough people had been hit and dropped, everyone knew, and it was just mass exodus.

People screamed and ran everywhere. Some of them tried to jump over the front barrier so they could get underneath the stage. Others were trying to pick up loved ones who’d been shot.

The next 15 minutes are a little foggy. I was helping my wife and the people around us to get down. Funny things come back to you afterward. One of my friends was carrying a 16-ounce beer in his hand. Somebody’s shooting at him and he’s walking around with his beer like he’s afraid to put it down. It was so surreal.

We got everybody underneath the tent, and then we just sat there. There would be shooting and then a pause. You’d think it was over. And then there would be more shooting and another pause. It felt like it never was going to stop.

After a short period of time, somebody came in with an official badge, maybe FBI, who knows. They said: “Okay, everybody up. We’ve got to get you out of here.” So, we all got up and headed across the stage. The gate they were taking us to was in full view of the shooter, so it wasn’t very safe.

As I got up, I looked out at the field. Bodies were scattered everywhere. I’m a trauma surgeon by trade. I couldn’t just leave.

I told my two best friends to take my wife with them. My wife lost her mind at that point. She didn’t want me to run out on the field. But I had to. I saw the injured and they needed help. Another buddy and I jumped over the fence and started taking care of people.

The feeling of being out on the field was one of complete frustration. I was in sandals, shorts, and a t-shirt. We had no stretchers, no medical supplies, no nothing. I didn’t have a belt to use as a tourniquet. I didn’t even have a bandage.

Worse: We were seeing high-velocity gunshot wounds that I’ve seen for 20 years in the Army. I know how to take care of them. I know how to fix them. But there wasn’t a single thing I could do.

We had to get people off the field, so we started gathering up as many as we could. We didn’t know if we were going to get shot at again, so we were trying to hide behind things as we ran. Our main objective was just to get people to a place of safety.

A lot of it is a blur. But a few patients stick out in my mind.

A father and son. The father had been shot through the abdomen, exited out through his back. He was in severe pain and couldn’t walk.

A young girl shot in the arm. Her parents carrying her.

A group of people doing CPR on a young lady. She had a gunshot wound to the head or neck. She was obviously dead. But they were still doing chest compressions in the middle of the field. I had to say to them: “She’s dead. You can’t save her. You need to get off the field.” But they wouldn’t stop. We picked her up and took her out while they continued to do CPR.

Later, I realized I knew that woman. She was part of a group of friends that we would see at the festival. I hadn’t recognized her. I also didn’t know that my friend Marco was there. A month or 2 later, we figured out that he was one of the people doing CPR. And I was the guy who came up and said his friend was dead.

Some people were so badly injured we couldn’t lift them. We started tearing apart the fencing used to separate the crowd and slid sections of the barricades under the wounded to carry them. We also carried off a bunch of people who were dead.

We were moving patients to a covered bar area where we thought they would be safer. What we didn’t know was there was an ambulance rally point at the very far end of the field. Unfortunately, we had no idea it was there.

I saw a lot of other first responders out there, people from the fire department, corpsmen from the Navy, medics. I ran into an anesthesia provider and a series of nurses.

When we got everybody off the field, we started moving them into vehicles. People were bringing their trucks up. One guy even stole a truck so he could drive people to the ED. There wasn’t a lot of triage. We were just stacking whoever we could into the backs of these pickups.

I tried to help a nurse taking care of a lady who had been shot in the neck. She was sitting sort of half upright with the patient lying in her arms. When I reached to help her, she said: “You can’t move her.”

“We need to get her to the hospital,” I replied.

“This is the only position that this lady has an airway,” she said. “You’re going to have to move both of us together. If I move at all, she loses her airway.”

So, a group of us managed to slide something underneath and lift them into the back of a truck.

Loading the wounded went on for a while. And then, just like that, everybody was gone.

I walked back out onto this field which not too long ago held 30,000 people. It was as if aliens had just suddenly beamed everyone out.

There was stuff on the ground everywhere – blankets, clothing, single boots, wallets, purses. I walked past a food stand with food still cooking on the grill. There was a beer tap still running. It was the weirdest feeling I’d ever had in my life.

After that, things got a little crazy again. There had been a report of a second shooter, and no one knew if it was real or not. The police started herding a group of us across the street to the Tropicana. We were still trying to take cover as we walked there. We went past a big lion statue in front of one of the casinos. I have a picture from two years earlier of me sitting on the back of that lion. I remember thinking: Now I’m hunkered down behind the same lion hiding from a shooter. Times change.

They brought about 50 of us into a food court, which was closed. They wouldn’t tell us what was going on. And they wouldn’t let us leave. This went on for hours. Meanwhile, I had dropped my cell phone on the field, so my wife couldn’t get hold of me, and later she told me she assumed I’d been shot. I was just hoping that she was safe.

People were huddled together, crying, holding each other. Most were wearing Western concert–going stuff, which for a lot of them wasn’t very much clothing. The hotel eventually brought some blankets.

I was covered in blood. My shirt, shorts, and sandals were soaked. It was running down my legs. I couldn’t find anything to eat or drink. At one point, I sat down at a slot machine, put a hundred dollars in, and started playing slots. I didn’t know what else to do. It didn’t take me very long to lose it all.

Finally, I started looking for a way to get out. I checked all the exits, but there were security and police there. Then I ran into a guy who said he had found a fire exit. When we opened the fire door, there was a big security guard there, and he said: “You can’t leave.”

We said: “Try to stop us. We’re out of here.”

Another thing I’ll always remember – after I broke out of the Tropicana, I was low crawling through the bushes along the Strip toward my hotel. I got a block away and stood up to cross the street. I pushed the crosswalk button and waited. There were no cars, no people. I’ve just broken all the rules, violated police orders, and now I’m standing there waiting for a blinking light to allow me to cross the street!

I made it back to my hotel room around 3:30 or 4:00 in the morning. My wife was hysterical because I hadn’t been answering my cell phone. I came in, and she gave me a big hug, and I got in the shower. Our plane was leaving in a few hours, so we laid down, but didn’t sleep.

As we were getting ready to leave, my wife’s phone rang, and it was my number. A guy at the same hotel had found my phone on the field and called the “in case of emergency” number. So, I got my phone back.

It wasn’t easy to deal with the aftermath. It really affected everybody’s life. To this day, I’m particular about where we sit at concerts. My wife isn’t comfortable if she can’t see an exit. I now have a med bag in my car with tourniquets, pressure dressings, airway masks for CPR.

I’ll never forget that feeling of absolute frustration. That lady without an airway – I could’ve put a trach in her very quickly and made a difference. Were they able to keep her airway? Did she live?

The father and son – did the father make it? I have no idea what happened to any of them. Later, I went through and looked at the pictures of all the people who had died, but I couldn’t recognize anybody.

The hardest part was being there with my wife. I’ve been in places where people are shooting at you, in vehicles that are getting bombed. I’ve always believed that when it’s your time, it’s your time. If I get shot, well, okay, that happens. But if she got shot or my friends ... that would be really tough.

A year later, I gave a talk about it at a conference. I thought I had worked through everything. But all of those feelings, all of that helplessness, that anger, everything came roaring back to the surface again. They asked me how I deal with it, and I said: “Well ... poorly.” I’m the guy who sticks it in a box in the back of his brain, tucks it in and buries it with a bunch of other boxes, and hopes it never comes out again. But every once in a while, it does.

There were all kinds of people out on that field, some with medical training, some without, all determined to help, trying to get those injured people where they needed to be. In retrospect, it does make you feel good. Somebody was shooting at us, but people were still willing to stand up and risk their lives to help others.

We still talk with our friends about what happened that night. Over the years, it’s become less and less. But there’s still a text sent out every year on that day: “Today is the anniversary. Glad we’re all alive. Thanks for being our friends.”

Dr. Sebesta is a bariatric surgeon with MultiCare Health System in Tacoma, Wash.

A version of this article first appeared on Medscape.com.

Sunday night. Las Vegas. Jason Aldean had just started playing.

My wife and I were at the 2017 Route 91 Harvest Festival with three other couples; two of them were our close friends. We were sitting in the VIP section, a tented area right next to the stage. We started hearing what I was convinced were fireworks.

I’ve been in the Army for 20 some years. I’ve been deployed and shot at multiple times. But these shots were far away. And you don’t expect people to be shooting at you at a concert.

I was on the edge of the VIP area, so I could see around the corner of the tent. I looked up at the Mandalay Bay and saw the muzzle flash in the hotel window. That’s when I knew.

I screamed: “Somebody’s shooting at us! Everybody get down!”

It took a while for people to realize what was going on. When the first couple volleys sprayed into the crowd, nobody understood. But once enough people had been hit and dropped, everyone knew, and it was just mass exodus.

People screamed and ran everywhere. Some of them tried to jump over the front barrier so they could get underneath the stage. Others were trying to pick up loved ones who’d been shot.

The next 15 minutes are a little foggy. I was helping my wife and the people around us to get down. Funny things come back to you afterward. One of my friends was carrying a 16-ounce beer in his hand. Somebody’s shooting at him and he’s walking around with his beer like he’s afraid to put it down. It was so surreal.

We got everybody underneath the tent, and then we just sat there. There would be shooting and then a pause. You’d think it was over. And then there would be more shooting and another pause. It felt like it never was going to stop.

After a short period of time, somebody came in with an official badge, maybe FBI, who knows. They said: “Okay, everybody up. We’ve got to get you out of here.” So, we all got up and headed across the stage. The gate they were taking us to was in full view of the shooter, so it wasn’t very safe.

As I got up, I looked out at the field. Bodies were scattered everywhere. I’m a trauma surgeon by trade. I couldn’t just leave.

I told my two best friends to take my wife with them. My wife lost her mind at that point. She didn’t want me to run out on the field. But I had to. I saw the injured and they needed help. Another buddy and I jumped over the fence and started taking care of people.

The feeling of being out on the field was one of complete frustration. I was in sandals, shorts, and a t-shirt. We had no stretchers, no medical supplies, no nothing. I didn’t have a belt to use as a tourniquet. I didn’t even have a bandage.

Worse: We were seeing high-velocity gunshot wounds that I’ve seen for 20 years in the Army. I know how to take care of them. I know how to fix them. But there wasn’t a single thing I could do.

We had to get people off the field, so we started gathering up as many as we could. We didn’t know if we were going to get shot at again, so we were trying to hide behind things as we ran. Our main objective was just to get people to a place of safety.

A lot of it is a blur. But a few patients stick out in my mind.

A father and son. The father had been shot through the abdomen, exited out through his back. He was in severe pain and couldn’t walk.

A young girl shot in the arm. Her parents carrying her.

A group of people doing CPR on a young lady. She had a gunshot wound to the head or neck. She was obviously dead. But they were still doing chest compressions in the middle of the field. I had to say to them: “She’s dead. You can’t save her. You need to get off the field.” But they wouldn’t stop. We picked her up and took her out while they continued to do CPR.

Later, I realized I knew that woman. She was part of a group of friends that we would see at the festival. I hadn’t recognized her. I also didn’t know that my friend Marco was there. A month or 2 later, we figured out that he was one of the people doing CPR. And I was the guy who came up and said his friend was dead.

Some people were so badly injured we couldn’t lift them. We started tearing apart the fencing used to separate the crowd and slid sections of the barricades under the wounded to carry them. We also carried off a bunch of people who were dead.

We were moving patients to a covered bar area where we thought they would be safer. What we didn’t know was there was an ambulance rally point at the very far end of the field. Unfortunately, we had no idea it was there.

I saw a lot of other first responders out there, people from the fire department, corpsmen from the Navy, medics. I ran into an anesthesia provider and a series of nurses.

When we got everybody off the field, we started moving them into vehicles. People were bringing their trucks up. One guy even stole a truck so he could drive people to the ED. There wasn’t a lot of triage. We were just stacking whoever we could into the backs of these pickups.

I tried to help a nurse taking care of a lady who had been shot in the neck. She was sitting sort of half upright with the patient lying in her arms. When I reached to help her, she said: “You can’t move her.”

“We need to get her to the hospital,” I replied.

“This is the only position that this lady has an airway,” she said. “You’re going to have to move both of us together. If I move at all, she loses her airway.”

So, a group of us managed to slide something underneath and lift them into the back of a truck.

Loading the wounded went on for a while. And then, just like that, everybody was gone.

I walked back out onto this field which not too long ago held 30,000 people. It was as if aliens had just suddenly beamed everyone out.

There was stuff on the ground everywhere – blankets, clothing, single boots, wallets, purses. I walked past a food stand with food still cooking on the grill. There was a beer tap still running. It was the weirdest feeling I’d ever had in my life.

After that, things got a little crazy again. There had been a report of a second shooter, and no one knew if it was real or not. The police started herding a group of us across the street to the Tropicana. We were still trying to take cover as we walked there. We went past a big lion statue in front of one of the casinos. I have a picture from two years earlier of me sitting on the back of that lion. I remember thinking: Now I’m hunkered down behind the same lion hiding from a shooter. Times change.

They brought about 50 of us into a food court, which was closed. They wouldn’t tell us what was going on. And they wouldn’t let us leave. This went on for hours. Meanwhile, I had dropped my cell phone on the field, so my wife couldn’t get hold of me, and later she told me she assumed I’d been shot. I was just hoping that she was safe.

People were huddled together, crying, holding each other. Most were wearing Western concert–going stuff, which for a lot of them wasn’t very much clothing. The hotel eventually brought some blankets.

I was covered in blood. My shirt, shorts, and sandals were soaked. It was running down my legs. I couldn’t find anything to eat or drink. At one point, I sat down at a slot machine, put a hundred dollars in, and started playing slots. I didn’t know what else to do. It didn’t take me very long to lose it all.

Finally, I started looking for a way to get out. I checked all the exits, but there were security and police there. Then I ran into a guy who said he had found a fire exit. When we opened the fire door, there was a big security guard there, and he said: “You can’t leave.”

We said: “Try to stop us. We’re out of here.”

Another thing I’ll always remember – after I broke out of the Tropicana, I was low crawling through the bushes along the Strip toward my hotel. I got a block away and stood up to cross the street. I pushed the crosswalk button and waited. There were no cars, no people. I’ve just broken all the rules, violated police orders, and now I’m standing there waiting for a blinking light to allow me to cross the street!

I made it back to my hotel room around 3:30 or 4:00 in the morning. My wife was hysterical because I hadn’t been answering my cell phone. I came in, and she gave me a big hug, and I got in the shower. Our plane was leaving in a few hours, so we laid down, but didn’t sleep.

As we were getting ready to leave, my wife’s phone rang, and it was my number. A guy at the same hotel had found my phone on the field and called the “in case of emergency” number. So, I got my phone back.

It wasn’t easy to deal with the aftermath. It really affected everybody’s life. To this day, I’m particular about where we sit at concerts. My wife isn’t comfortable if she can’t see an exit. I now have a med bag in my car with tourniquets, pressure dressings, airway masks for CPR.

I’ll never forget that feeling of absolute frustration. That lady without an airway – I could’ve put a trach in her very quickly and made a difference. Were they able to keep her airway? Did she live?

The father and son – did the father make it? I have no idea what happened to any of them. Later, I went through and looked at the pictures of all the people who had died, but I couldn’t recognize anybody.

The hardest part was being there with my wife. I’ve been in places where people are shooting at you, in vehicles that are getting bombed. I’ve always believed that when it’s your time, it’s your time. If I get shot, well, okay, that happens. But if she got shot or my friends ... that would be really tough.

A year later, I gave a talk about it at a conference. I thought I had worked through everything. But all of those feelings, all of that helplessness, that anger, everything came roaring back to the surface again. They asked me how I deal with it, and I said: “Well ... poorly.” I’m the guy who sticks it in a box in the back of his brain, tucks it in and buries it with a bunch of other boxes, and hopes it never comes out again. But every once in a while, it does.

There were all kinds of people out on that field, some with medical training, some without, all determined to help, trying to get those injured people where they needed to be. In retrospect, it does make you feel good. Somebody was shooting at us, but people were still willing to stand up and risk their lives to help others.

We still talk with our friends about what happened that night. Over the years, it’s become less and less. But there’s still a text sent out every year on that day: “Today is the anniversary. Glad we’re all alive. Thanks for being our friends.”

Dr. Sebesta is a bariatric surgeon with MultiCare Health System in Tacoma, Wash.

A version of this article first appeared on Medscape.com.