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Lawmakers have added a provision to raise Medicare payments to clinicians to a $460 billion bipartisan package of federal spending bills that passed in the House on March 6 and is expected to be passed in the Senate and signed by President Biden before then end of March 8, but industry groups have criticized it as paltry.

Lawmakers often tweak Medicare policy by adding provisions to other kinds of legislation, including the spending bills Congress must pass to keep the federal government running.

Physicians’ groups and some lawmakers have long pressed Congress to change Medicare payment rules with little success, even as inflation has caused physicians’ expenses to rise. Doctors now face a 3.4% cut to Medicare reimbursements in 2024, which would be only partly mitigated by the recently announced provision.

The Medical Group Management Association (MGMA) said the proposed increase would total 1.68%. The increase, part of a bipartisan package of bills released by the House and Senate Appropriations committees on March 3, would apply to the budget for fiscal 2024, which began on October 1, 2023.

“We are deeply disappointed with Congress’ half-hearted attempt to remedy the devastating blow physician practices were dealt by the 2024 Medicare Physician Fee Schedule,” Anders Gilberg, senior vice president of MGMA, said in a statement. “Anything less than a full reversal of the 3.4% cut is appallingly inadequate.”

The American Medical Association said it was “extremely disappointed” that the boost only eased, but did not fully reverse, a deeper planned cut.

The American Academy of Family Physicians (AAFP) also expressed disappointment with the proposed increase.

“The AAFP has repeatedly told Congress that the 3.4% Medicare payment reduction that went into effect on January 1 is untenable for family physicians and threatens patients’ access to primary care,” the group said in a statement.

“While we appreciate the partial relief, family physicians continue to face an annual threat of payment cuts that are detrimental to practices and patients,” AAFP said.

A version of this article appeared on Medscape.com.

Lawmakers have added a provision to raise Medicare payments to clinicians to a $460 billion bipartisan package of federal spending bills that passed in the House on March 6 and is expected to be passed in the Senate and signed by President Biden before then end of March 8, but industry groups have criticized it as paltry.

Lawmakers often tweak Medicare policy by adding provisions to other kinds of legislation, including the spending bills Congress must pass to keep the federal government running.

Physicians’ groups and some lawmakers have long pressed Congress to change Medicare payment rules with little success, even as inflation has caused physicians’ expenses to rise. Doctors now face a 3.4% cut to Medicare reimbursements in 2024, which would be only partly mitigated by the recently announced provision.

The Medical Group Management Association (MGMA) said the proposed increase would total 1.68%. The increase, part of a bipartisan package of bills released by the House and Senate Appropriations committees on March 3, would apply to the budget for fiscal 2024, which began on October 1, 2023.

“We are deeply disappointed with Congress’ half-hearted attempt to remedy the devastating blow physician practices were dealt by the 2024 Medicare Physician Fee Schedule,” Anders Gilberg, senior vice president of MGMA, said in a statement. “Anything less than a full reversal of the 3.4% cut is appallingly inadequate.”

The American Medical Association said it was “extremely disappointed” that the boost only eased, but did not fully reverse, a deeper planned cut.

The American Academy of Family Physicians (AAFP) also expressed disappointment with the proposed increase.

“The AAFP has repeatedly told Congress that the 3.4% Medicare payment reduction that went into effect on January 1 is untenable for family physicians and threatens patients’ access to primary care,” the group said in a statement.

“While we appreciate the partial relief, family physicians continue to face an annual threat of payment cuts that are detrimental to practices and patients,” AAFP said.

A version of this article appeared on Medscape.com.

Lawmakers have added a provision to raise Medicare payments to clinicians to a $460 billion bipartisan package of federal spending bills that passed in the House on March 6 and is expected to be passed in the Senate and signed by President Biden before then end of March 8, but industry groups have criticized it as paltry.

Lawmakers often tweak Medicare policy by adding provisions to other kinds of legislation, including the spending bills Congress must pass to keep the federal government running.

Physicians’ groups and some lawmakers have long pressed Congress to change Medicare payment rules with little success, even as inflation has caused physicians’ expenses to rise. Doctors now face a 3.4% cut to Medicare reimbursements in 2024, which would be only partly mitigated by the recently announced provision.

The Medical Group Management Association (MGMA) said the proposed increase would total 1.68%. The increase, part of a bipartisan package of bills released by the House and Senate Appropriations committees on March 3, would apply to the budget for fiscal 2024, which began on October 1, 2023.

“We are deeply disappointed with Congress’ half-hearted attempt to remedy the devastating blow physician practices were dealt by the 2024 Medicare Physician Fee Schedule,” Anders Gilberg, senior vice president of MGMA, said in a statement. “Anything less than a full reversal of the 3.4% cut is appallingly inadequate.”

The American Medical Association said it was “extremely disappointed” that the boost only eased, but did not fully reverse, a deeper planned cut.

The American Academy of Family Physicians (AAFP) also expressed disappointment with the proposed increase.

“The AAFP has repeatedly told Congress that the 3.4% Medicare payment reduction that went into effect on January 1 is untenable for family physicians and threatens patients’ access to primary care,” the group said in a statement.

“While we appreciate the partial relief, family physicians continue to face an annual threat of payment cuts that are detrimental to practices and patients,” AAFP said.

A version of this article appeared on Medscape.com.

Do I deserve to be here? Am I doing what I’m supposed to be doing? Is anyone going to tell me if I’m terrible?

Kerri Palamara McGrath, MD, remembered worrying over these questions as chief resident at Massachusetts General Hospital, Boston, Massachusetts, in 2009. Having graduated from New York Medical College, she felt out of step with her peers from Ivy League medical schools and considered herself lucky to be there. In order to measure up, she felt she had to work twice as hard as everybody else.

But as Dr. McGrath moved through residency and spoke with other trainees, she had a realization. Her constant fears, the nagging voice in her head saying she wasn’t good enough, these issues weren’t exclusive to her; they were pervasive.

Today, Dr. McGrath is the director of the Center for Physician Well-Being at Massachusetts General Hospital. The facility aims to address physician stress and equip doctors with the tools to navigate personal and professional issues. Dr. McGrath is also a physician coach, a growing nonclinical field, helping doctors identify their own stressors, values, and measures of success. This type of internal work, Dr. McGrath feels, can help alleviate imposter syndrome, that inner refrain saying: I’ll never be good enough.

What Is Imposter Syndrome?

While not a formal medical diagnosis, imposter syndrome has been defined as «an internal experience of intellectual phoniness.» It›s considered an inability to internalize success and a tendency to attribute gains to external factors — for example, being in the right place at the right time.

“Many people describe imposter phenomena in medicine as fearing that others are going to realize that they don’t belong somewhere or question why they’re there,” said Dr. McGrath.

It’s a “fear of being found out,” added Jessi Gold, MD, a psychiatrist who treats physicians. “In many ways, imposter syndrome shows up as a conflict between the outer self — the metaphorical mask you’re ‘putting on’ [in order] to achieve, and the inner self — how you feel like you’re not measuring up.”

Dr. McGrath said she experienced imposter syndrome before her medical career even began. She applied to 26 medical schools. Only one accepted her. “The whole time, I was like, ‘This is the only school you got into, so you’re obviously not good enough,’” she recalled. Later, having been chosen by a “coveted” institution like Mass General, “you assume that, at some point, someone will realize that the gig is up, that everybody’s better than you.”

Where Does Imposter Syndrome Come From?

Dr. McGrath felt that in medicine, high expectations are often coupled with low self-compassion. “We are so hard on ourselves, and when we set our expectations so high, we’re constantly disappointed in ourselves,” she said. External markers of success — papers published, promotions, or even social media — can further fuel this.

It can feel like “striving for excellence in a sea of excellence,” Dr. McGrath added, and this can invite comparison.

Ravi Parikh, MD, a medical oncologist and physician-scientist at the University of Pennsylvania, Philadelphia, Pennsylvania, remembered struggling with imposter syndrome early in his career. As a new doctor, he had a ton of questions, and yet those above him seemed able to make weighty decisions on their own. The comparison shook his confidence. “I remember thinking that when I became an attending, I would just magically not have to run decisions by people,” said Dr. Parikh. But even then, the “magical” self-assurance didn’t materialize.

Research found that imposter syndrome is more likely to affect women and groups that are underrepresented in medicine. But overall, the incidence is remarkably high.

A 2023 survey published in the Journal of the American College of Surgeons found that 90% of female surgeons and more than two-thirds of male ones experienced imposter syndrome. In a 2023 study on medical students in JAMA, it was nearly universal; 97% reported feelings of imposter syndrome with women 1.7 times more likely to report it than men and underrepresented groups often three times more likely.

‘I’m Clearly in the Minority Here’

The term “imposter” also suggests a lack of belonging. If medicine doesn’t “look like you,” this can create feelings of pressure, like you’re “representing a whole group with your mere existence,” said Dr. Gold, “and you have to keep proving yourself.”

Chloe Slocum, MD, MPH, an assistant professor of physical medicine and rehabilitation at Harvard Medical School, Boston, Massachusetts, remembered that feeling of conspicuous “otherness.” As a resident, Dr. Slocum began presenting at national meetings and later pursued physician leadership training. Many of her counterparts at these events were older males. “At some programs early on, I’d wonder, ‘I’m clearly in the minority here; did they really make the right decision including me in this?’”

Reactions from those around you can also have an impact. Dr. McGrath — who is 5’ 2” and describes herself as looking “very young” — noted that when she started out, neither patients nor other providers thought she was a doctor.

“I have tried everything in the book to be seen, in somebody else’s eyes, as more consistent with a doctor,” she said. “I’ve dressed down. I’ve dressed up. I’ve worn heels. I’ve worn flats. I’ve worn glasses. I’ve done all the things. When you’re constantly being told you don’t look like a doctor, you start questioning yourself.”

The Emotional Toll

If that sounds mentally exhausting, it is. Research found that imposter syndrome is often linked with burnout, depression, and anxiety.

The need to prove yourself and prevent being “found out” can push some doctors toward traditional measurements of success — promotions or published work, said Dr. Gold. But “if you’re trying to achieve in ways that you don’t value,” she warned, “you’re going to burn out.”

On the other hand, intense self-doubt can also limit advancement. After all, if you don’t think you’re good enough, you may not apply for job opportunities or leadership positions.

This mental burden can persist over years and even decades. A 2020 review of studies on imposter syndrome noted that “it would be reassuring to believe that imposter symptoms decline with age.” Unfortunately, several studies indicated that they do not.

How to Manage Imposter Syndrome

While it can be difficult to overcome imposter syndrome, there are ways to work through it and make it less pervasive or intense. Here are some tips from our experts:

• Prioritize your mental health. This can be difficult for some physicians, but don’t ignore symptoms of depression, anxiety, or burnout. Untreated mental health conditions cloud the ability to reflect on some of the existential questions that will help you navigate imposter syndrome, said Dr. Gold.
• Assess how often you need validation and why. Try to identify what you›re feeling, what needs aren›t being met, and how you can meet those needs. You can then consider where to get that validation either internally or by connecting with a colleague. Dr. McGrath encourages physicians to ask, “What does success look like for me?” and can you make success more personal and meaningful. It might sound shocking, but rather than an unattainable ideal, success should be something that feels good.
• Know the power of teamwork. As Dr. Parikh eventually realized, collaborative care is a common and beneficial part of medicine — not something that makes you a less-than physician. “There’s a lot of opportunity to crowdsource the medical decision-making process in ways that increase your own confidence as a doctor,” he said.
• Practice self-compassion. Critical voices in your head add to an already hard and stressful world. This is where self-compassion comes in. “We don’t have much control over medicine, but we have control over how medicine makes us feel,” Dr. Gold said. Imagine treating yourself how you would treat a friend.
• Consider a physician coach.  suggests that physician coaches can help lower rates of burnout and improve well-being, resilience, professional fulfillment, and self-worth. “Coaching looks into the future to help you envision what things would look like if you were feeling differently. It helps you explore what’s in your control and how you want to shape that,” said Dr. McGrath.
• Amplify the good. Apps and web-based tools can remind you to celebrate your own achievements. The “” exercise created by J. Bryan Sexton, PhD, at the Duke Center for Healthcare Safety & Quality for example, was documented in a . When healthcare workers reflected on three good things that happened each day for 2 weeks, they reported significant improvements in depression, burnout, and work-life balance.
• Do a values check. Dr. Gold often suggested that physicians with imposter syndrome ask themselves what they value, what medicine values, and how the two line up. Pausing to consider this can guide you toward useful strategies. If you value family life but feel like medicine doesn’t, for example, you might talk with a colleague who has navigated this conflict.

Dr. Gold added that reminding yourself of the range of options can be freeing. “There’s no ‘one career’ in medicine,” she said. “There are multiple ways to be happy in medicine; there are multiple ways to be happy outside of medicine. And you’re not a failure for the path you choose.”

A version of this article appeared on Medscape.com.

Do I deserve to be here? Am I doing what I’m supposed to be doing? Is anyone going to tell me if I’m terrible?

Kerri Palamara McGrath, MD, remembered worrying over these questions as chief resident at Massachusetts General Hospital, Boston, Massachusetts, in 2009. Having graduated from New York Medical College, she felt out of step with her peers from Ivy League medical schools and considered herself lucky to be there. In order to measure up, she felt she had to work twice as hard as everybody else.

But as Dr. McGrath moved through residency and spoke with other trainees, she had a realization. Her constant fears, the nagging voice in her head saying she wasn’t good enough, these issues weren’t exclusive to her; they were pervasive.

Today, Dr. McGrath is the director of the Center for Physician Well-Being at Massachusetts General Hospital. The facility aims to address physician stress and equip doctors with the tools to navigate personal and professional issues. Dr. McGrath is also a physician coach, a growing nonclinical field, helping doctors identify their own stressors, values, and measures of success. This type of internal work, Dr. McGrath feels, can help alleviate imposter syndrome, that inner refrain saying: I’ll never be good enough.

What Is Imposter Syndrome?

While not a formal medical diagnosis, imposter syndrome has been defined as «an internal experience of intellectual phoniness.» It›s considered an inability to internalize success and a tendency to attribute gains to external factors — for example, being in the right place at the right time.

“Many people describe imposter phenomena in medicine as fearing that others are going to realize that they don’t belong somewhere or question why they’re there,” said Dr. McGrath.

It’s a “fear of being found out,” added Jessi Gold, MD, a psychiatrist who treats physicians. “In many ways, imposter syndrome shows up as a conflict between the outer self — the metaphorical mask you’re ‘putting on’ [in order] to achieve, and the inner self — how you feel like you’re not measuring up.”

Dr. McGrath said she experienced imposter syndrome before her medical career even began. She applied to 26 medical schools. Only one accepted her. “The whole time, I was like, ‘This is the only school you got into, so you’re obviously not good enough,’” she recalled. Later, having been chosen by a “coveted” institution like Mass General, “you assume that, at some point, someone will realize that the gig is up, that everybody’s better than you.”

Where Does Imposter Syndrome Come From?

Dr. McGrath felt that in medicine, high expectations are often coupled with low self-compassion. “We are so hard on ourselves, and when we set our expectations so high, we’re constantly disappointed in ourselves,” she said. External markers of success — papers published, promotions, or even social media — can further fuel this.

It can feel like “striving for excellence in a sea of excellence,” Dr. McGrath added, and this can invite comparison.

Ravi Parikh, MD, a medical oncologist and physician-scientist at the University of Pennsylvania, Philadelphia, Pennsylvania, remembered struggling with imposter syndrome early in his career. As a new doctor, he had a ton of questions, and yet those above him seemed able to make weighty decisions on their own. The comparison shook his confidence. “I remember thinking that when I became an attending, I would just magically not have to run decisions by people,” said Dr. Parikh. But even then, the “magical” self-assurance didn’t materialize.

Research found that imposter syndrome is more likely to affect women and groups that are underrepresented in medicine. But overall, the incidence is remarkably high.

A 2023 survey published in the Journal of the American College of Surgeons found that 90% of female surgeons and more than two-thirds of male ones experienced imposter syndrome. In a 2023 study on medical students in JAMA, it was nearly universal; 97% reported feelings of imposter syndrome with women 1.7 times more likely to report it than men and underrepresented groups often three times more likely.

‘I’m Clearly in the Minority Here’

The term “imposter” also suggests a lack of belonging. If medicine doesn’t “look like you,” this can create feelings of pressure, like you’re “representing a whole group with your mere existence,” said Dr. Gold, “and you have to keep proving yourself.”

Chloe Slocum, MD, MPH, an assistant professor of physical medicine and rehabilitation at Harvard Medical School, Boston, Massachusetts, remembered that feeling of conspicuous “otherness.” As a resident, Dr. Slocum began presenting at national meetings and later pursued physician leadership training. Many of her counterparts at these events were older males. “At some programs early on, I’d wonder, ‘I’m clearly in the minority here; did they really make the right decision including me in this?’”

Reactions from those around you can also have an impact. Dr. McGrath — who is 5’ 2” and describes herself as looking “very young” — noted that when she started out, neither patients nor other providers thought she was a doctor.

“I have tried everything in the book to be seen, in somebody else’s eyes, as more consistent with a doctor,” she said. “I’ve dressed down. I’ve dressed up. I’ve worn heels. I’ve worn flats. I’ve worn glasses. I’ve done all the things. When you’re constantly being told you don’t look like a doctor, you start questioning yourself.”

The Emotional Toll

If that sounds mentally exhausting, it is. Research found that imposter syndrome is often linked with burnout, depression, and anxiety.

The need to prove yourself and prevent being “found out” can push some doctors toward traditional measurements of success — promotions or published work, said Dr. Gold. But “if you’re trying to achieve in ways that you don’t value,” she warned, “you’re going to burn out.”

On the other hand, intense self-doubt can also limit advancement. After all, if you don’t think you’re good enough, you may not apply for job opportunities or leadership positions.

This mental burden can persist over years and even decades. A 2020 review of studies on imposter syndrome noted that “it would be reassuring to believe that imposter symptoms decline with age.” Unfortunately, several studies indicated that they do not.

How to Manage Imposter Syndrome

While it can be difficult to overcome imposter syndrome, there are ways to work through it and make it less pervasive or intense. Here are some tips from our experts:

• Prioritize your mental health. This can be difficult for some physicians, but don’t ignore symptoms of depression, anxiety, or burnout. Untreated mental health conditions cloud the ability to reflect on some of the existential questions that will help you navigate imposter syndrome, said Dr. Gold.
• Assess how often you need validation and why. Try to identify what you›re feeling, what needs aren›t being met, and how you can meet those needs. You can then consider where to get that validation either internally or by connecting with a colleague. Dr. McGrath encourages physicians to ask, “What does success look like for me?” and can you make success more personal and meaningful. It might sound shocking, but rather than an unattainable ideal, success should be something that feels good.
• Know the power of teamwork. As Dr. Parikh eventually realized, collaborative care is a common and beneficial part of medicine — not something that makes you a less-than physician. “There’s a lot of opportunity to crowdsource the medical decision-making process in ways that increase your own confidence as a doctor,” he said.
• Practice self-compassion. Critical voices in your head add to an already hard and stressful world. This is where self-compassion comes in. “We don’t have much control over medicine, but we have control over how medicine makes us feel,” Dr. Gold said. Imagine treating yourself how you would treat a friend.
• Consider a physician coach.  suggests that physician coaches can help lower rates of burnout and improve well-being, resilience, professional fulfillment, and self-worth. “Coaching looks into the future to help you envision what things would look like if you were feeling differently. It helps you explore what’s in your control and how you want to shape that,” said Dr. McGrath.
• Amplify the good. Apps and web-based tools can remind you to celebrate your own achievements. The “” exercise created by J. Bryan Sexton, PhD, at the Duke Center for Healthcare Safety & Quality for example, was documented in a . When healthcare workers reflected on three good things that happened each day for 2 weeks, they reported significant improvements in depression, burnout, and work-life balance.
• Do a values check. Dr. Gold often suggested that physicians with imposter syndrome ask themselves what they value, what medicine values, and how the two line up. Pausing to consider this can guide you toward useful strategies. If you value family life but feel like medicine doesn’t, for example, you might talk with a colleague who has navigated this conflict.

Dr. Gold added that reminding yourself of the range of options can be freeing. “There’s no ‘one career’ in medicine,” she said. “There are multiple ways to be happy in medicine; there are multiple ways to be happy outside of medicine. And you’re not a failure for the path you choose.”

A version of this article appeared on Medscape.com.

Do I deserve to be here? Am I doing what I’m supposed to be doing? Is anyone going to tell me if I’m terrible?

Kerri Palamara McGrath, MD, remembered worrying over these questions as chief resident at Massachusetts General Hospital, Boston, Massachusetts, in 2009. Having graduated from New York Medical College, she felt out of step with her peers from Ivy League medical schools and considered herself lucky to be there. In order to measure up, she felt she had to work twice as hard as everybody else.

But as Dr. McGrath moved through residency and spoke with other trainees, she had a realization. Her constant fears, the nagging voice in her head saying she wasn’t good enough, these issues weren’t exclusive to her; they were pervasive.

Today, Dr. McGrath is the director of the Center for Physician Well-Being at Massachusetts General Hospital. The facility aims to address physician stress and equip doctors with the tools to navigate personal and professional issues. Dr. McGrath is also a physician coach, a growing nonclinical field, helping doctors identify their own stressors, values, and measures of success. This type of internal work, Dr. McGrath feels, can help alleviate imposter syndrome, that inner refrain saying: I’ll never be good enough.

What Is Imposter Syndrome?

While not a formal medical diagnosis, imposter syndrome has been defined as «an internal experience of intellectual phoniness.» It›s considered an inability to internalize success and a tendency to attribute gains to external factors — for example, being in the right place at the right time.

“Many people describe imposter phenomena in medicine as fearing that others are going to realize that they don’t belong somewhere or question why they’re there,” said Dr. McGrath.

It’s a “fear of being found out,” added Jessi Gold, MD, a psychiatrist who treats physicians. “In many ways, imposter syndrome shows up as a conflict between the outer self — the metaphorical mask you’re ‘putting on’ [in order] to achieve, and the inner self — how you feel like you’re not measuring up.”

Dr. McGrath said she experienced imposter syndrome before her medical career even began. She applied to 26 medical schools. Only one accepted her. “The whole time, I was like, ‘This is the only school you got into, so you’re obviously not good enough,’” she recalled. Later, having been chosen by a “coveted” institution like Mass General, “you assume that, at some point, someone will realize that the gig is up, that everybody’s better than you.”

Where Does Imposter Syndrome Come From?

Dr. McGrath felt that in medicine, high expectations are often coupled with low self-compassion. “We are so hard on ourselves, and when we set our expectations so high, we’re constantly disappointed in ourselves,” she said. External markers of success — papers published, promotions, or even social media — can further fuel this.

It can feel like “striving for excellence in a sea of excellence,” Dr. McGrath added, and this can invite comparison.

Ravi Parikh, MD, a medical oncologist and physician-scientist at the University of Pennsylvania, Philadelphia, Pennsylvania, remembered struggling with imposter syndrome early in his career. As a new doctor, he had a ton of questions, and yet those above him seemed able to make weighty decisions on their own. The comparison shook his confidence. “I remember thinking that when I became an attending, I would just magically not have to run decisions by people,” said Dr. Parikh. But even then, the “magical” self-assurance didn’t materialize.

Research found that imposter syndrome is more likely to affect women and groups that are underrepresented in medicine. But overall, the incidence is remarkably high.

A 2023 survey published in the Journal of the American College of Surgeons found that 90% of female surgeons and more than two-thirds of male ones experienced imposter syndrome. In a 2023 study on medical students in JAMA, it was nearly universal; 97% reported feelings of imposter syndrome with women 1.7 times more likely to report it than men and underrepresented groups often three times more likely.

‘I’m Clearly in the Minority Here’

The term “imposter” also suggests a lack of belonging. If medicine doesn’t “look like you,” this can create feelings of pressure, like you’re “representing a whole group with your mere existence,” said Dr. Gold, “and you have to keep proving yourself.”

Chloe Slocum, MD, MPH, an assistant professor of physical medicine and rehabilitation at Harvard Medical School, Boston, Massachusetts, remembered that feeling of conspicuous “otherness.” As a resident, Dr. Slocum began presenting at national meetings and later pursued physician leadership training. Many of her counterparts at these events were older males. “At some programs early on, I’d wonder, ‘I’m clearly in the minority here; did they really make the right decision including me in this?’”

Reactions from those around you can also have an impact. Dr. McGrath — who is 5’ 2” and describes herself as looking “very young” — noted that when she started out, neither patients nor other providers thought she was a doctor.

“I have tried everything in the book to be seen, in somebody else’s eyes, as more consistent with a doctor,” she said. “I’ve dressed down. I’ve dressed up. I’ve worn heels. I’ve worn flats. I’ve worn glasses. I’ve done all the things. When you’re constantly being told you don’t look like a doctor, you start questioning yourself.”

The Emotional Toll

If that sounds mentally exhausting, it is. Research found that imposter syndrome is often linked with burnout, depression, and anxiety.

The need to prove yourself and prevent being “found out” can push some doctors toward traditional measurements of success — promotions or published work, said Dr. Gold. But “if you’re trying to achieve in ways that you don’t value,” she warned, “you’re going to burn out.”

On the other hand, intense self-doubt can also limit advancement. After all, if you don’t think you’re good enough, you may not apply for job opportunities or leadership positions.

This mental burden can persist over years and even decades. A 2020 review of studies on imposter syndrome noted that “it would be reassuring to believe that imposter symptoms decline with age.” Unfortunately, several studies indicated that they do not.

How to Manage Imposter Syndrome

While it can be difficult to overcome imposter syndrome, there are ways to work through it and make it less pervasive or intense. Here are some tips from our experts:

• Prioritize your mental health. This can be difficult for some physicians, but don’t ignore symptoms of depression, anxiety, or burnout. Untreated mental health conditions cloud the ability to reflect on some of the existential questions that will help you navigate imposter syndrome, said Dr. Gold.
• Assess how often you need validation and why. Try to identify what you›re feeling, what needs aren›t being met, and how you can meet those needs. You can then consider where to get that validation either internally or by connecting with a colleague. Dr. McGrath encourages physicians to ask, “What does success look like for me?” and can you make success more personal and meaningful. It might sound shocking, but rather than an unattainable ideal, success should be something that feels good.
• Know the power of teamwork. As Dr. Parikh eventually realized, collaborative care is a common and beneficial part of medicine — not something that makes you a less-than physician. “There’s a lot of opportunity to crowdsource the medical decision-making process in ways that increase your own confidence as a doctor,” he said.
• Practice self-compassion. Critical voices in your head add to an already hard and stressful world. This is where self-compassion comes in. “We don’t have much control over medicine, but we have control over how medicine makes us feel,” Dr. Gold said. Imagine treating yourself how you would treat a friend.
• Consider a physician coach.  suggests that physician coaches can help lower rates of burnout and improve well-being, resilience, professional fulfillment, and self-worth. “Coaching looks into the future to help you envision what things would look like if you were feeling differently. It helps you explore what’s in your control and how you want to shape that,” said Dr. McGrath.
• Amplify the good. Apps and web-based tools can remind you to celebrate your own achievements. The “” exercise created by J. Bryan Sexton, PhD, at the Duke Center for Healthcare Safety & Quality for example, was documented in a . When healthcare workers reflected on three good things that happened each day for 2 weeks, they reported significant improvements in depression, burnout, and work-life balance.
• Do a values check. Dr. Gold often suggested that physicians with imposter syndrome ask themselves what they value, what medicine values, and how the two line up. Pausing to consider this can guide you toward useful strategies. If you value family life but feel like medicine doesn’t, for example, you might talk with a colleague who has navigated this conflict.

Dr. Gold added that reminding yourself of the range of options can be freeing. “There’s no ‘one career’ in medicine,” she said. “There are multiple ways to be happy in medicine; there are multiple ways to be happy outside of medicine. And you’re not a failure for the path you choose.”

A version of this article appeared on Medscape.com.

Carpet beetle larvae of the family Dermestidae have been documented to cause both acute and delayed hypersensitivity reactions in susceptible individuals. These larvae have specialized horizontal rows of spear-shaped hairs called hastisetae, which detach easily into the surrounding environment and are small enough to travel by air. Exposure to hastisetae has been tied to adverse effects ranging from dermatitis to rhinoconjunctivitis and acute asthma, with treatment being mostly empiric and symptom based. Due to the pervasiveness of carpet beetles in homes, improved awareness of dermestid-induced manifestations is valuable for clinicians.

Beetles in the Dermestidae family do not bite humans but have been reported to cause skin reactions in addition to other symptoms typical of an allergic reaction. Skin contact with larval hairs (hastisetae) of these insects—known as carpet, larder, or hide beetles — may cause urticarial or edematous papules that are mistaken for papular urticaria or arthropod bites. ¹ There are approximately 500 to 700 species of carpet beetles worldwide. Carpet beetles are a clinically underrecognized cause of allergic contact dermatitis given their frequent presence in homes across the world. ² Carpet beetle larvae feed on shed skin, feathers, hair, wool, book bindings, felt, leather, wood, silk, and sometimes grains and thus can be found nearly anywhere. Most symptom-inducing exposures to Dermestidae beetles occur occupationally, such as in museum curators working hands-on with collection materials and workers handling infested materials such as wool. ^3,4 In-home Dermestidae exposure may lead to symptoms, especially if regularly worn clothing and bedding materials are infested. The broad palate of dermestid members has resulted in substantial contamination of stored materials such as flour and fabric in addition to the destruction of museum collections. ^5-7

The larvae of some dermestid species, most commonly of the genera Anthrenus and Dermestes, are 2 to 3 mm in length and have detachable hairlike hastisetae that shed into the surrounding environment throughout larval development (Figure 1).⁸ The hastisetae, located on the thoracic and abdominal segments (tergites), serve as a larval defense mechanism. When prodded, the round, hairy, wormlike larvae tense up and can raise their abdominal tergites while splaying the hastisetae out in a fanlike manner.⁹ Similar to porcupine quills, the hastisetae easily detach and can entrap the appendages of invertebrate predators. Hastisetae are not known to be sharp enough to puncture human skin, but friction and irritation from skin contact and superficial sticking of the hastisetae into mucous membranes and noncornified epithelium, such as in the bronchial airways, are thought to induce hypersensitivity reactions in susceptible individuals.

Additionally, hastisetae and the exoskeletons of both adult and larval dermestid beetles are composed mostly of chitin, which is highly allergenic. Chitin has been found to play a proinflammatory role in ocular inflammation, asthma, and bronchial reactivity via T helper cell (T_H2)–mediated cellular interactions.^10-12 Larvae shed their exoskeletons, including hastisetae, multiple times over the course of their development, which contributes to their potential allergen burden (Figure 2). Reports of positive prick and/or patch testing to larval components indicate some cases of both acute type 1 and delayed type 4 hypersensitivity reactions.^4,8,13

Clinical Presentation and Diagnosis

Multiple erythematous urticarial papules, papulopustules, and papulovesicles are the typical manifestations of dermestid dermatitis.^3,4,13-16 Figure 3 demonstrates several characteristic edematous papules with background erythema. Unlike the clusters seen with flea and bed bug bites, dermestid-induced lesions typically are single and scattered, with a propensity for exposed limbs and the face. Exposure to hastisetae commonly results in classic allergic symptoms including rhinitis, conjunctivitis, coughing, wheezing, sneezing, and intranasal and periocular pruritus, even in those with no personal history of atopy.^17-19 Lymphadenopathy, vasculitis, and allergic alveolitis also have been reported.²⁰ A large infestation in which many individual beetles as well as larvae can be found in 1 or more areas of the inhabited structure has been reported to cause more severe symptoms, including acute eczema, otitis externa, lymphocytic vasculitis, and allergic alveolitis, all of which resolved within 3 months of thorough deinfestation cleaning.²¹

Skin-prick and/or patch testing is not necessary for this clinical diagnosis of dermestid-induced allergic contact dermatitis. This diagnosis is bolstered by (but does not require a history of) repeated symptom induction upon performing certain activities (eg, handling taxidermy specimens) and/or in certain environments (eg, only at home). Because of individual differences in hypersensitivity to dermestid parts, it is not typical for all members of a household to be affected.

When there are multiple potential suspected allergens or an unknown cause for symptoms despite a detailed history, allergy testing can be useful in confirming a diagnosis and directing management. Immediate-onset type 1 hypersensitivity reactions are evaluated using skin-prick testing or serum IgE levels, whereas delayed type 4 hypersensitivity reactions can be evaluated using patch testing. Type 1 reactions tend to present with classic allergy symptoms, especially where there are abundant mast cells to degranulate in the skin and mucosa of the gastrointestinal and respiratory tracts; these symptoms range from mild wheezing, urticaria, periorbital pruritus, and sneezing to outright asthma, diarrhea, rhinoconjunctivitis, and even anaphylaxis. With these reactions, initial exposure to an antigen such as chitin in the hastisetae leads to an asymptomatic sensitization against the antigen in which its introduction leads to a T_H2-skewed cellular response, which promotes B-cell production of IgE antibodies. Upon subsequent exposure to this antigen, IgE antibodies bound to mast cells will lead them to degranulate with release of histamine and other proinflammatory molecules, resulting in clinical manifestations. The skin-prick test relies on introduction of potential antigens through the epidermis into the dermis with a sharp lancet to induce IgE antibody activation and then degranulation of the patient’s mast cells, resulting in a pruritic erythematous wheal. This IgE-mediated process has been shown to occur in response to dermestid larval parts among household dust, resulting in chronic coughing, sneezing, nasal pruritus, and asthma.^15,17,22

Type 4 hypersensitivity reactions are T-cell mediated and also include a sensitization phase followed by symptom manifestation upon repeat exposure; however, these reactions usually are not immediate and can take up to 72 hours after exposure to manifest.²³ This is because T cells specific to the antigen do not lead a process resulting in antibodies but instead recruit numerous other T_H1-polarized mediators upon re-exposure to activate cytotoxic CD8⁺ T cells and macrophages to attempt to neutralize the antigen. Many type 4 reactions result in mostly cutaneous manifestations, such as contact dermatitis. Patch testing involves adhering potential allergens to the skin for a time with assessments at regular intervals to evaluate the level of reaction from weakly positive to severe. At minimum, most reports of dermestid-related manifestations include a rash such as erythematous papules, and several published cases involving patch testing have yielded positive results to various preparations of larval parts.^3,14,21

Management and Treatment

Prevention of dermestid exposure is difficult given the myriad materials eaten by the larvae. An insect exterminator should verify and treat a carpet beetle infestation, while a dermatologist can treat symptomatic individuals. Treatment is driven by the severity of the patient’s discomfort and is aimed at both symptomatic relief and reducing dermestid exposure moving forward. Although in certain environments it will be nearly impossible to eradicate Dermestidae, cleaning thoroughly and regularly may go far to reduce exposure and associated symptoms.

Clothing and other materials such as bedding that will have direct skin contact should be washed to remove hastisetae and be stored in airtight containers in addition to items made with animal fibers, such as wool sweaters and down blankets. Mattresses, flooring, rugs, curtains, and other amenable areas should be vacuumed thoroughly, and the vacuum bag should be placed in the trash afterward. Protective pillow and mattress covers should be used. Stuffed animals in infested areas should be thrown away if not able to be completely washed and dried. Air conditioning systems may spread larval hairs away from the site of infestation and should be cleaned as much as possible. Surfaces where beetles and larvae also are commonly seen, such as windowsills, and hidden among closet and pantry items should also be wiped clean to remove both insects and potential substrate. In one case, scraping the wood flooring and applying a thick coat of varnish in addition to removing all stuffed animals from an affected individual’s home allowed for resolution of symptoms.¹⁷

Treatment for symptoms includes topical anti-inflammatory agents and/or oral antihistamines, with improvement in symptoms typically occurring within days and resolution dependent on level of exposure moving forward.

Final Thoughts

There is a broad overlap between dermestid habitats and human-occupied environments; thus, the opportunities for exposure and sensitization to allergenic dermestid parts are numerous. Dermatologists should be aware of the possible manifestations from dermestid exposure.

Carpet beetle larvae of the family Dermestidae have been documented to cause both acute and delayed hypersensitivity reactions in susceptible individuals. These larvae have specialized horizontal rows of spear-shaped hairs called hastisetae, which detach easily into the surrounding environment and are small enough to travel by air. Exposure to hastisetae has been tied to adverse effects ranging from dermatitis to rhinoconjunctivitis and acute asthma, with treatment being mostly empiric and symptom based. Due to the pervasiveness of carpet beetles in homes, improved awareness of dermestid-induced manifestations is valuable for clinicians.

Beetles in the Dermestidae family do not bite humans but have been reported to cause skin reactions in addition to other symptoms typical of an allergic reaction. Skin contact with larval hairs (hastisetae) of these insects—known as carpet, larder, or hide beetles — may cause urticarial or edematous papules that are mistaken for papular urticaria or arthropod bites. ¹ There are approximately 500 to 700 species of carpet beetles worldwide. Carpet beetles are a clinically underrecognized cause of allergic contact dermatitis given their frequent presence in homes across the world. ² Carpet beetle larvae feed on shed skin, feathers, hair, wool, book bindings, felt, leather, wood, silk, and sometimes grains and thus can be found nearly anywhere. Most symptom-inducing exposures to Dermestidae beetles occur occupationally, such as in museum curators working hands-on with collection materials and workers handling infested materials such as wool. ^3,4 In-home Dermestidae exposure may lead to symptoms, especially if regularly worn clothing and bedding materials are infested. The broad palate of dermestid members has resulted in substantial contamination of stored materials such as flour and fabric in addition to the destruction of museum collections. ^5-7

The larvae of some dermestid species, most commonly of the genera Anthrenus and Dermestes, are 2 to 3 mm in length and have detachable hairlike hastisetae that shed into the surrounding environment throughout larval development (Figure 1).⁸ The hastisetae, located on the thoracic and abdominal segments (tergites), serve as a larval defense mechanism. When prodded, the round, hairy, wormlike larvae tense up and can raise their abdominal tergites while splaying the hastisetae out in a fanlike manner.⁹ Similar to porcupine quills, the hastisetae easily detach and can entrap the appendages of invertebrate predators. Hastisetae are not known to be sharp enough to puncture human skin, but friction and irritation from skin contact and superficial sticking of the hastisetae into mucous membranes and noncornified epithelium, such as in the bronchial airways, are thought to induce hypersensitivity reactions in susceptible individuals.

Additionally, hastisetae and the exoskeletons of both adult and larval dermestid beetles are composed mostly of chitin, which is highly allergenic. Chitin has been found to play a proinflammatory role in ocular inflammation, asthma, and bronchial reactivity via T helper cell (T_H2)–mediated cellular interactions.^10-12 Larvae shed their exoskeletons, including hastisetae, multiple times over the course of their development, which contributes to their potential allergen burden (Figure 2). Reports of positive prick and/or patch testing to larval components indicate some cases of both acute type 1 and delayed type 4 hypersensitivity reactions.^4,8,13

Clinical Presentation and Diagnosis

Multiple erythematous urticarial papules, papulopustules, and papulovesicles are the typical manifestations of dermestid dermatitis.^3,4,13-16 Figure 3 demonstrates several characteristic edematous papules with background erythema. Unlike the clusters seen with flea and bed bug bites, dermestid-induced lesions typically are single and scattered, with a propensity for exposed limbs and the face. Exposure to hastisetae commonly results in classic allergic symptoms including rhinitis, conjunctivitis, coughing, wheezing, sneezing, and intranasal and periocular pruritus, even in those with no personal history of atopy.^17-19 Lymphadenopathy, vasculitis, and allergic alveolitis also have been reported.²⁰ A large infestation in which many individual beetles as well as larvae can be found in 1 or more areas of the inhabited structure has been reported to cause more severe symptoms, including acute eczema, otitis externa, lymphocytic vasculitis, and allergic alveolitis, all of which resolved within 3 months of thorough deinfestation cleaning.²¹

Skin-prick and/or patch testing is not necessary for this clinical diagnosis of dermestid-induced allergic contact dermatitis. This diagnosis is bolstered by (but does not require a history of) repeated symptom induction upon performing certain activities (eg, handling taxidermy specimens) and/or in certain environments (eg, only at home). Because of individual differences in hypersensitivity to dermestid parts, it is not typical for all members of a household to be affected.

When there are multiple potential suspected allergens or an unknown cause for symptoms despite a detailed history, allergy testing can be useful in confirming a diagnosis and directing management. Immediate-onset type 1 hypersensitivity reactions are evaluated using skin-prick testing or serum IgE levels, whereas delayed type 4 hypersensitivity reactions can be evaluated using patch testing. Type 1 reactions tend to present with classic allergy symptoms, especially where there are abundant mast cells to degranulate in the skin and mucosa of the gastrointestinal and respiratory tracts; these symptoms range from mild wheezing, urticaria, periorbital pruritus, and sneezing to outright asthma, diarrhea, rhinoconjunctivitis, and even anaphylaxis. With these reactions, initial exposure to an antigen such as chitin in the hastisetae leads to an asymptomatic sensitization against the antigen in which its introduction leads to a T_H2-skewed cellular response, which promotes B-cell production of IgE antibodies. Upon subsequent exposure to this antigen, IgE antibodies bound to mast cells will lead them to degranulate with release of histamine and other proinflammatory molecules, resulting in clinical manifestations. The skin-prick test relies on introduction of potential antigens through the epidermis into the dermis with a sharp lancet to induce IgE antibody activation and then degranulation of the patient’s mast cells, resulting in a pruritic erythematous wheal. This IgE-mediated process has been shown to occur in response to dermestid larval parts among household dust, resulting in chronic coughing, sneezing, nasal pruritus, and asthma.^15,17,22

Type 4 hypersensitivity reactions are T-cell mediated and also include a sensitization phase followed by symptom manifestation upon repeat exposure; however, these reactions usually are not immediate and can take up to 72 hours after exposure to manifest.²³ This is because T cells specific to the antigen do not lead a process resulting in antibodies but instead recruit numerous other T_H1-polarized mediators upon re-exposure to activate cytotoxic CD8⁺ T cells and macrophages to attempt to neutralize the antigen. Many type 4 reactions result in mostly cutaneous manifestations, such as contact dermatitis. Patch testing involves adhering potential allergens to the skin for a time with assessments at regular intervals to evaluate the level of reaction from weakly positive to severe. At minimum, most reports of dermestid-related manifestations include a rash such as erythematous papules, and several published cases involving patch testing have yielded positive results to various preparations of larval parts.^3,14,21

Management and Treatment

Prevention of dermestid exposure is difficult given the myriad materials eaten by the larvae. An insect exterminator should verify and treat a carpet beetle infestation, while a dermatologist can treat symptomatic individuals. Treatment is driven by the severity of the patient’s discomfort and is aimed at both symptomatic relief and reducing dermestid exposure moving forward. Although in certain environments it will be nearly impossible to eradicate Dermestidae, cleaning thoroughly and regularly may go far to reduce exposure and associated symptoms.

Clothing and other materials such as bedding that will have direct skin contact should be washed to remove hastisetae and be stored in airtight containers in addition to items made with animal fibers, such as wool sweaters and down blankets. Mattresses, flooring, rugs, curtains, and other amenable areas should be vacuumed thoroughly, and the vacuum bag should be placed in the trash afterward. Protective pillow and mattress covers should be used. Stuffed animals in infested areas should be thrown away if not able to be completely washed and dried. Air conditioning systems may spread larval hairs away from the site of infestation and should be cleaned as much as possible. Surfaces where beetles and larvae also are commonly seen, such as windowsills, and hidden among closet and pantry items should also be wiped clean to remove both insects and potential substrate. In one case, scraping the wood flooring and applying a thick coat of varnish in addition to removing all stuffed animals from an affected individual’s home allowed for resolution of symptoms.¹⁷

Treatment for symptoms includes topical anti-inflammatory agents and/or oral antihistamines, with improvement in symptoms typically occurring within days and resolution dependent on level of exposure moving forward.

Final Thoughts

There is a broad overlap between dermestid habitats and human-occupied environments; thus, the opportunities for exposure and sensitization to allergenic dermestid parts are numerous. Dermatologists should be aware of the possible manifestations from dermestid exposure.

Carpet beetle larvae of the family Dermestidae have been documented to cause both acute and delayed hypersensitivity reactions in susceptible individuals. These larvae have specialized horizontal rows of spear-shaped hairs called hastisetae, which detach easily into the surrounding environment and are small enough to travel by air. Exposure to hastisetae has been tied to adverse effects ranging from dermatitis to rhinoconjunctivitis and acute asthma, with treatment being mostly empiric and symptom based. Due to the pervasiveness of carpet beetles in homes, improved awareness of dermestid-induced manifestations is valuable for clinicians.

Beetles in the Dermestidae family do not bite humans but have been reported to cause skin reactions in addition to other symptoms typical of an allergic reaction. Skin contact with larval hairs (hastisetae) of these insects—known as carpet, larder, or hide beetles — may cause urticarial or edematous papules that are mistaken for papular urticaria or arthropod bites. ¹ There are approximately 500 to 700 species of carpet beetles worldwide. Carpet beetles are a clinically underrecognized cause of allergic contact dermatitis given their frequent presence in homes across the world. ² Carpet beetle larvae feed on shed skin, feathers, hair, wool, book bindings, felt, leather, wood, silk, and sometimes grains and thus can be found nearly anywhere. Most symptom-inducing exposures to Dermestidae beetles occur occupationally, such as in museum curators working hands-on with collection materials and workers handling infested materials such as wool. ^3,4 In-home Dermestidae exposure may lead to symptoms, especially if regularly worn clothing and bedding materials are infested. The broad palate of dermestid members has resulted in substantial contamination of stored materials such as flour and fabric in addition to the destruction of museum collections. ^5-7

The larvae of some dermestid species, most commonly of the genera Anthrenus and Dermestes, are 2 to 3 mm in length and have detachable hairlike hastisetae that shed into the surrounding environment throughout larval development (Figure 1).⁸ The hastisetae, located on the thoracic and abdominal segments (tergites), serve as a larval defense mechanism. When prodded, the round, hairy, wormlike larvae tense up and can raise their abdominal tergites while splaying the hastisetae out in a fanlike manner.⁹ Similar to porcupine quills, the hastisetae easily detach and can entrap the appendages of invertebrate predators. Hastisetae are not known to be sharp enough to puncture human skin, but friction and irritation from skin contact and superficial sticking of the hastisetae into mucous membranes and noncornified epithelium, such as in the bronchial airways, are thought to induce hypersensitivity reactions in susceptible individuals.

Additionally, hastisetae and the exoskeletons of both adult and larval dermestid beetles are composed mostly of chitin, which is highly allergenic. Chitin has been found to play a proinflammatory role in ocular inflammation, asthma, and bronchial reactivity via T helper cell (T_H2)–mediated cellular interactions.^10-12 Larvae shed their exoskeletons, including hastisetae, multiple times over the course of their development, which contributes to their potential allergen burden (Figure 2). Reports of positive prick and/or patch testing to larval components indicate some cases of both acute type 1 and delayed type 4 hypersensitivity reactions.^4,8,13

Clinical Presentation and Diagnosis

Multiple erythematous urticarial papules, papulopustules, and papulovesicles are the typical manifestations of dermestid dermatitis.^3,4,13-16 Figure 3 demonstrates several characteristic edematous papules with background erythema. Unlike the clusters seen with flea and bed bug bites, dermestid-induced lesions typically are single and scattered, with a propensity for exposed limbs and the face. Exposure to hastisetae commonly results in classic allergic symptoms including rhinitis, conjunctivitis, coughing, wheezing, sneezing, and intranasal and periocular pruritus, even in those with no personal history of atopy.^17-19 Lymphadenopathy, vasculitis, and allergic alveolitis also have been reported.²⁰ A large infestation in which many individual beetles as well as larvae can be found in 1 or more areas of the inhabited structure has been reported to cause more severe symptoms, including acute eczema, otitis externa, lymphocytic vasculitis, and allergic alveolitis, all of which resolved within 3 months of thorough deinfestation cleaning.²¹

Skin-prick and/or patch testing is not necessary for this clinical diagnosis of dermestid-induced allergic contact dermatitis. This diagnosis is bolstered by (but does not require a history of) repeated symptom induction upon performing certain activities (eg, handling taxidermy specimens) and/or in certain environments (eg, only at home). Because of individual differences in hypersensitivity to dermestid parts, it is not typical for all members of a household to be affected.

When there are multiple potential suspected allergens or an unknown cause for symptoms despite a detailed history, allergy testing can be useful in confirming a diagnosis and directing management. Immediate-onset type 1 hypersensitivity reactions are evaluated using skin-prick testing or serum IgE levels, whereas delayed type 4 hypersensitivity reactions can be evaluated using patch testing. Type 1 reactions tend to present with classic allergy symptoms, especially where there are abundant mast cells to degranulate in the skin and mucosa of the gastrointestinal and respiratory tracts; these symptoms range from mild wheezing, urticaria, periorbital pruritus, and sneezing to outright asthma, diarrhea, rhinoconjunctivitis, and even anaphylaxis. With these reactions, initial exposure to an antigen such as chitin in the hastisetae leads to an asymptomatic sensitization against the antigen in which its introduction leads to a T_H2-skewed cellular response, which promotes B-cell production of IgE antibodies. Upon subsequent exposure to this antigen, IgE antibodies bound to mast cells will lead them to degranulate with release of histamine and other proinflammatory molecules, resulting in clinical manifestations. The skin-prick test relies on introduction of potential antigens through the epidermis into the dermis with a sharp lancet to induce IgE antibody activation and then degranulation of the patient’s mast cells, resulting in a pruritic erythematous wheal. This IgE-mediated process has been shown to occur in response to dermestid larval parts among household dust, resulting in chronic coughing, sneezing, nasal pruritus, and asthma.^15,17,22

Type 4 hypersensitivity reactions are T-cell mediated and also include a sensitization phase followed by symptom manifestation upon repeat exposure; however, these reactions usually are not immediate and can take up to 72 hours after exposure to manifest.²³ This is because T cells specific to the antigen do not lead a process resulting in antibodies but instead recruit numerous other T_H1-polarized mediators upon re-exposure to activate cytotoxic CD8⁺ T cells and macrophages to attempt to neutralize the antigen. Many type 4 reactions result in mostly cutaneous manifestations, such as contact dermatitis. Patch testing involves adhering potential allergens to the skin for a time with assessments at regular intervals to evaluate the level of reaction from weakly positive to severe. At minimum, most reports of dermestid-related manifestations include a rash such as erythematous papules, and several published cases involving patch testing have yielded positive results to various preparations of larval parts.^3,14,21

Management and Treatment

Prevention of dermestid exposure is difficult given the myriad materials eaten by the larvae. An insect exterminator should verify and treat a carpet beetle infestation, while a dermatologist can treat symptomatic individuals. Treatment is driven by the severity of the patient’s discomfort and is aimed at both symptomatic relief and reducing dermestid exposure moving forward. Although in certain environments it will be nearly impossible to eradicate Dermestidae, cleaning thoroughly and regularly may go far to reduce exposure and associated symptoms.

Clothing and other materials such as bedding that will have direct skin contact should be washed to remove hastisetae and be stored in airtight containers in addition to items made with animal fibers, such as wool sweaters and down blankets. Mattresses, flooring, rugs, curtains, and other amenable areas should be vacuumed thoroughly, and the vacuum bag should be placed in the trash afterward. Protective pillow and mattress covers should be used. Stuffed animals in infested areas should be thrown away if not able to be completely washed and dried. Air conditioning systems may spread larval hairs away from the site of infestation and should be cleaned as much as possible. Surfaces where beetles and larvae also are commonly seen, such as windowsills, and hidden among closet and pantry items should also be wiped clean to remove both insects and potential substrate. In one case, scraping the wood flooring and applying a thick coat of varnish in addition to removing all stuffed animals from an affected individual’s home allowed for resolution of symptoms.¹⁷

Treatment for symptoms includes topical anti-inflammatory agents and/or oral antihistamines, with improvement in symptoms typically occurring within days and resolution dependent on level of exposure moving forward.

Final Thoughts

There is a broad overlap between dermestid habitats and human-occupied environments; thus, the opportunities for exposure and sensitization to allergenic dermestid parts are numerous. Dermatologists should be aware of the possible manifestations from dermestid exposure.

Hospital mergers and acquisitions continue to garner intense scrutiny from lawmakers, with pressure likely to hold steady following the recent announcement of new antitrust guidelines and state and federal investigations into potential healthcare monopolies.

In December, the US Department of Justice (DOJ) and the Federal Trade Commission (FTC) released updated guidelines outlining the factors they consider when determining if a merger illegally monopolizes a local healthcare market or jeopardizes access to critical healthcare services.

Last week, the DOJ also announced a UnitedHealth Group antitrust probe, just months after the healthcare conglomerate’s workforce numbers indicated it is now affiliated with or employs 10% of the US physician workforce.

While the impact of the latest guidelines is yet to be seen, concerns over healthcare market consolidation are not new. Over the past two decades, mergers have attracted attention for contributing to a decline in independent hospitals, said Rachel M. Werner, MD, PhD, executive director of the Leonard Davis Institute of Health Economics at the University of Pennsylvania, Philadelphia, Pennsylvania.

“At this point, most hospitals are operating in a pretty concentrated market,” she said.

Here are five things to know about the current state of hospital mergers.

1. Record-Breaking Merger Enforcements

The DOJ and FTC reported the highest level of enforcement activity in over 20 years in fiscal year 2022 — the latest available data. Together, the agencies filed 50 merger enforcement actions and brought a record-breaking number of merger enforcement challenges, resulting in 11 approved actions, the restructuring or abandonment of seven mergers, and six business deals entering litigation.

Included in those statistics was a proposed merger between the two largest health systems in Rhode Island, Lifespan and Care New England Health System, which was abandoned after the FTC and the state Attorney General took steps to block it. the HCA branch in Utah Healthcare abandoned plans for to acquire five Salt Lake City area hospitals from competitor Steward Health Care System, as did RWJBarnabas Health after exploring a merger with Saint Peter's Healthcare System in New Jersey.

2. New Antitrust Guidelines Consider Labor Market

The new guidelines notably focus on labor competition, said Jody Boudreault, JD, attorney and chair of the Antitrust Life Sciences and Healthcare Group at Baker Botts law firm in Washington, DC. Health professionals typically have more employment opportunities in an urban area, unless hindered by restrictive noncompete agreements, and fewer options in rural settings.

In the Lifespan merger that fell through, Ms. Boudreault said that the newly created hospital system would have employed two thirds of Rhode Island's full-time nurses, limiting opportunities for local employment elsewhere.

“Going forward, I would expect federal authorities to review not only the competitive impact of the hospitals merging but also the competitive impact of the physician, and especially nursing, workforce,” she said.

FTC Chair Lina M. Khan noted similar labor market concerns.

In a statement to Congress, she said that hospital consolidation reduces options for employees, who fear “being blacklisted from further hiring in a system that controls many of the hospitals in the area” and “makes workers afraid to file complaints, organize their workplace, or leave before the end of a contract.”

3. Mergers Can Drive Care Costs Higher

When hospital markets become less competitive, the cost of care often increases. In Indiana, inpatient prices rose 13% in hospitals that merged. Another study found that prices at monopoly hospitals are 12% higher than in markets with four or more rivals. Even cross-market mergers, when hospitals in different geographic locations combine, can drive prices higher.

Dr. Werner told this news organization that more significant price hikes of 20-30% aren’t unheard of, with reimbursements by some commercial insurance companies rising as much as 50%. “That’s the direct price that the insurers pay, but the burden of those higher prices ultimately falls on patients through higher premiums,” she said.

Still, the American Hospital Association (AHA) says that mergers and acquisitions can significantly lower annual operating expenses per admission and reduce inpatient readmission rates and mortality measures. In comments to the FTC, the AHA stated that mergers could provide a lifeline for rural and community hospitals struggling with shrinking payer reimbursement and rising labor and supply costs. The business arrangements also could ensure these communities maintain continuity of care.

Although a cross-market merger may initially benefit cash-strapped rural hospitals, Dr. Werner urged caution.

“In the long run, it’s not clear that it is good for patients because we start to see decreased access to some types of service, like labor and delivery, which are services needed in rural markets,” she said.

4. Mergers to Watch in 2024

Ms. Boudreault, who represented RWJBarnabas in the abandoned Saint Peter’s transaction, says the courts widely accepted the old merger guidelines, and it will take time to see how the new measures are interpreted. “The guidelines don’t yet have the force of law, but they can be persuasive to a court.”

Looking ahead, she is watching how Steward Health Care navigates its impending financial collapse. The nation’s largest private for-profit health system was previously owned by private equity firm Cerberus Capital Management and includes nine Massachusetts hospitals plus entities in at least seven other states.

Ms. Boudreault also plans to monitor Jefferson Health’s intent to merge with Lehigh Valley Health Network. “It’s a pretty big deal because they would become a 30-hospital system,” said Ms. Boudreault. The newly formed network would become the largest employer in Philadelphia.

5. Merger and Acquisition Reversals Unlikely

Dr. Werner said that mergers and acquisitions are complicated business moves that are nearly impossible to undo once approved, so it makes sense for agencies to continue to evaluate them closely.

“The costs of healthcare are borne by us as a society,” she said. “We’re going to have to live with the ill effects of a consolidated market once we let hospitals merge, so they deserve additional scrutiny.”

A version of this article appeared on Medscape.com.

Hospital mergers and acquisitions continue to garner intense scrutiny from lawmakers, with pressure likely to hold steady following the recent announcement of new antitrust guidelines and state and federal investigations into potential healthcare monopolies.

In December, the US Department of Justice (DOJ) and the Federal Trade Commission (FTC) released updated guidelines outlining the factors they consider when determining if a merger illegally monopolizes a local healthcare market or jeopardizes access to critical healthcare services.

Last week, the DOJ also announced a UnitedHealth Group antitrust probe, just months after the healthcare conglomerate’s workforce numbers indicated it is now affiliated with or employs 10% of the US physician workforce.

While the impact of the latest guidelines is yet to be seen, concerns over healthcare market consolidation are not new. Over the past two decades, mergers have attracted attention for contributing to a decline in independent hospitals, said Rachel M. Werner, MD, PhD, executive director of the Leonard Davis Institute of Health Economics at the University of Pennsylvania, Philadelphia, Pennsylvania.

“At this point, most hospitals are operating in a pretty concentrated market,” she said.

Here are five things to know about the current state of hospital mergers.

1. Record-Breaking Merger Enforcements

The DOJ and FTC reported the highest level of enforcement activity in over 20 years in fiscal year 2022 — the latest available data. Together, the agencies filed 50 merger enforcement actions and brought a record-breaking number of merger enforcement challenges, resulting in 11 approved actions, the restructuring or abandonment of seven mergers, and six business deals entering litigation.

Included in those statistics was a proposed merger between the two largest health systems in Rhode Island, Lifespan and Care New England Health System, which was abandoned after the FTC and the state Attorney General took steps to block it. the HCA branch in Utah Healthcare abandoned plans for to acquire five Salt Lake City area hospitals from competitor Steward Health Care System, as did RWJBarnabas Health after exploring a merger with Saint Peter's Healthcare System in New Jersey.

2. New Antitrust Guidelines Consider Labor Market

The new guidelines notably focus on labor competition, said Jody Boudreault, JD, attorney and chair of the Antitrust Life Sciences and Healthcare Group at Baker Botts law firm in Washington, DC. Health professionals typically have more employment opportunities in an urban area, unless hindered by restrictive noncompete agreements, and fewer options in rural settings.

In the Lifespan merger that fell through, Ms. Boudreault said that the newly created hospital system would have employed two thirds of Rhode Island's full-time nurses, limiting opportunities for local employment elsewhere.

“Going forward, I would expect federal authorities to review not only the competitive impact of the hospitals merging but also the competitive impact of the physician, and especially nursing, workforce,” she said.

FTC Chair Lina M. Khan noted similar labor market concerns.

In a statement to Congress, she said that hospital consolidation reduces options for employees, who fear “being blacklisted from further hiring in a system that controls many of the hospitals in the area” and “makes workers afraid to file complaints, organize their workplace, or leave before the end of a contract.”

3. Mergers Can Drive Care Costs Higher

When hospital markets become less competitive, the cost of care often increases. In Indiana, inpatient prices rose 13% in hospitals that merged. Another study found that prices at monopoly hospitals are 12% higher than in markets with four or more rivals. Even cross-market mergers, when hospitals in different geographic locations combine, can drive prices higher.

Dr. Werner told this news organization that more significant price hikes of 20-30% aren’t unheard of, with reimbursements by some commercial insurance companies rising as much as 50%. “That’s the direct price that the insurers pay, but the burden of those higher prices ultimately falls on patients through higher premiums,” she said.

Still, the American Hospital Association (AHA) says that mergers and acquisitions can significantly lower annual operating expenses per admission and reduce inpatient readmission rates and mortality measures. In comments to the FTC, the AHA stated that mergers could provide a lifeline for rural and community hospitals struggling with shrinking payer reimbursement and rising labor and supply costs. The business arrangements also could ensure these communities maintain continuity of care.

Although a cross-market merger may initially benefit cash-strapped rural hospitals, Dr. Werner urged caution.

“In the long run, it’s not clear that it is good for patients because we start to see decreased access to some types of service, like labor and delivery, which are services needed in rural markets,” she said.

4. Mergers to Watch in 2024

Ms. Boudreault, who represented RWJBarnabas in the abandoned Saint Peter’s transaction, says the courts widely accepted the old merger guidelines, and it will take time to see how the new measures are interpreted. “The guidelines don’t yet have the force of law, but they can be persuasive to a court.”

Looking ahead, she is watching how Steward Health Care navigates its impending financial collapse. The nation’s largest private for-profit health system was previously owned by private equity firm Cerberus Capital Management and includes nine Massachusetts hospitals plus entities in at least seven other states.

Ms. Boudreault also plans to monitor Jefferson Health’s intent to merge with Lehigh Valley Health Network. “It’s a pretty big deal because they would become a 30-hospital system,” said Ms. Boudreault. The newly formed network would become the largest employer in Philadelphia.

5. Merger and Acquisition Reversals Unlikely

Dr. Werner said that mergers and acquisitions are complicated business moves that are nearly impossible to undo once approved, so it makes sense for agencies to continue to evaluate them closely.

“The costs of healthcare are borne by us as a society,” she said. “We’re going to have to live with the ill effects of a consolidated market once we let hospitals merge, so they deserve additional scrutiny.”

A version of this article appeared on Medscape.com.

Hospital mergers and acquisitions continue to garner intense scrutiny from lawmakers, with pressure likely to hold steady following the recent announcement of new antitrust guidelines and state and federal investigations into potential healthcare monopolies.

In December, the US Department of Justice (DOJ) and the Federal Trade Commission (FTC) released updated guidelines outlining the factors they consider when determining if a merger illegally monopolizes a local healthcare market or jeopardizes access to critical healthcare services.

Last week, the DOJ also announced a UnitedHealth Group antitrust probe, just months after the healthcare conglomerate’s workforce numbers indicated it is now affiliated with or employs 10% of the US physician workforce.

While the impact of the latest guidelines is yet to be seen, concerns over healthcare market consolidation are not new. Over the past two decades, mergers have attracted attention for contributing to a decline in independent hospitals, said Rachel M. Werner, MD, PhD, executive director of the Leonard Davis Institute of Health Economics at the University of Pennsylvania, Philadelphia, Pennsylvania.

“At this point, most hospitals are operating in a pretty concentrated market,” she said.

Here are five things to know about the current state of hospital mergers.

1. Record-Breaking Merger Enforcements

The DOJ and FTC reported the highest level of enforcement activity in over 20 years in fiscal year 2022 — the latest available data. Together, the agencies filed 50 merger enforcement actions and brought a record-breaking number of merger enforcement challenges, resulting in 11 approved actions, the restructuring or abandonment of seven mergers, and six business deals entering litigation.

Included in those statistics was a proposed merger between the two largest health systems in Rhode Island, Lifespan and Care New England Health System, which was abandoned after the FTC and the state Attorney General took steps to block it. the HCA branch in Utah Healthcare abandoned plans for to acquire five Salt Lake City area hospitals from competitor Steward Health Care System, as did RWJBarnabas Health after exploring a merger with Saint Peter's Healthcare System in New Jersey.

2. New Antitrust Guidelines Consider Labor Market

The new guidelines notably focus on labor competition, said Jody Boudreault, JD, attorney and chair of the Antitrust Life Sciences and Healthcare Group at Baker Botts law firm in Washington, DC. Health professionals typically have more employment opportunities in an urban area, unless hindered by restrictive noncompete agreements, and fewer options in rural settings.

In the Lifespan merger that fell through, Ms. Boudreault said that the newly created hospital system would have employed two thirds of Rhode Island's full-time nurses, limiting opportunities for local employment elsewhere.

“Going forward, I would expect federal authorities to review not only the competitive impact of the hospitals merging but also the competitive impact of the physician, and especially nursing, workforce,” she said.

FTC Chair Lina M. Khan noted similar labor market concerns.

In a statement to Congress, she said that hospital consolidation reduces options for employees, who fear “being blacklisted from further hiring in a system that controls many of the hospitals in the area” and “makes workers afraid to file complaints, organize their workplace, or leave before the end of a contract.”

3. Mergers Can Drive Care Costs Higher

When hospital markets become less competitive, the cost of care often increases. In Indiana, inpatient prices rose 13% in hospitals that merged. Another study found that prices at monopoly hospitals are 12% higher than in markets with four or more rivals. Even cross-market mergers, when hospitals in different geographic locations combine, can drive prices higher.

Dr. Werner told this news organization that more significant price hikes of 20-30% aren’t unheard of, with reimbursements by some commercial insurance companies rising as much as 50%. “That’s the direct price that the insurers pay, but the burden of those higher prices ultimately falls on patients through higher premiums,” she said.

Still, the American Hospital Association (AHA) says that mergers and acquisitions can significantly lower annual operating expenses per admission and reduce inpatient readmission rates and mortality measures. In comments to the FTC, the AHA stated that mergers could provide a lifeline for rural and community hospitals struggling with shrinking payer reimbursement and rising labor and supply costs. The business arrangements also could ensure these communities maintain continuity of care.

Although a cross-market merger may initially benefit cash-strapped rural hospitals, Dr. Werner urged caution.

“In the long run, it’s not clear that it is good for patients because we start to see decreased access to some types of service, like labor and delivery, which are services needed in rural markets,” she said.

4. Mergers to Watch in 2024

Ms. Boudreault, who represented RWJBarnabas in the abandoned Saint Peter’s transaction, says the courts widely accepted the old merger guidelines, and it will take time to see how the new measures are interpreted. “The guidelines don’t yet have the force of law, but they can be persuasive to a court.”

Looking ahead, she is watching how Steward Health Care navigates its impending financial collapse. The nation’s largest private for-profit health system was previously owned by private equity firm Cerberus Capital Management and includes nine Massachusetts hospitals plus entities in at least seven other states.

Ms. Boudreault also plans to monitor Jefferson Health’s intent to merge with Lehigh Valley Health Network. “It’s a pretty big deal because they would become a 30-hospital system,” said Ms. Boudreault. The newly formed network would become the largest employer in Philadelphia.

5. Merger and Acquisition Reversals Unlikely

Dr. Werner said that mergers and acquisitions are complicated business moves that are nearly impossible to undo once approved, so it makes sense for agencies to continue to evaluate them closely.

“The costs of healthcare are borne by us as a society,” she said. “We’re going to have to live with the ill effects of a consolidated market once we let hospitals merge, so they deserve additional scrutiny.”

A version of this article appeared on Medscape.com.

To the Editor:

We read with interest the September 2023 Cutis article by Swink et al,¹ “Cat Scratch Disease Presenting With Concurrent Pityriasis Rosea in a 10-Year-Old Girl.” The authors documented the possibility of Bartonella henselae infection as another causative agent for pityriasis rosea (PR) even though the association of PR with human herpesvirus (HHV) 6 and HHV-7 infection is based on several consistent observations and not on occasional findings. The association of PR with endogenous systemic reactivation of HHV-6 and HHV-7 has been identified with different investigations and laboratory techniques. Using polymerase chain reaction, real-time calibrated quantitative polymerase chain reaction, in situ hybridization, immunohistochemistry, and electron microscopy, HHV-6 and HHV-7 have been detected in plasma (a marker of active viral replication), peripheral blood mononuclear cells, and skin lesions from patients with PR.² In addition, HHV-6 and HHV-7 messenger RNA expression and their specific antigens have been detected in PR skin lesions and herpesvirus virions in various stages of morphogenesis as well as in the supernatant of co-cultured peripheral blood mononuclear cells of patients with PR.^2,3 Lastly, the increased levels of several particular cytokines and chemokinesin the sera of patients with PR support a viral role in its pathogenesis.⁴

Bartonella henselae is a gram-negative intracellular facultative bacterium that is commonly implicated in causing zoonotic infections worldwide. The incidence of cat-scratch disease (CSD) was reported to be 6.4 cases per 100,000 population in adults and 9.4 cases per 100,000 population in children aged 5 to 9 years globally.⁵ Approximately 24,000 cases of CSD are reported in the United States every year.⁶ Therefore, considering these data, if B henselae was a causative agent for PR, the eruption would be observed frequently in many patients with CSD, which is not the case. On the contrary, it is possible that B henselae infection may have reactivated HHV-6 and/or HHV-7 infection. It is well established that B henselae causes a robust cell-mediated immune response by activating natural killer and helper T cells (T_H1) and enhancement of cytotoxic T lymphocytes.⁷ It could be assumed that by strongly stimulating the immune response and polarizing it to a specific antigen cell response, B henselae infection may temporarily distract the T cell-mediated control of the latent infections, such as HHV-6 and HHV-7, which may reactivate and cause PR.

It is important to point out that a case of concomitant B henselae and Epstein-Barr virus infection has been described.⁸ Even in that case, the B henselae infection may have reactivated Epstein-Barr virus as well as HHV-6 and HHV-7 in the case described by Swink et al.¹ Epstein-Barr virus reactivation has been detected in one case⁸ through serologic testing—IgM, IgG, Epstein-Barr virus nuclear antigen IgG, and heterophile antibodies—as there were no dermatologic manifestations that may be related to Epstein-Barr virus reactivation from latency.⁹

In conclusion, a viral or bacterial infection such as Epstein-Barr virus or B henselae may have a transactivating function allowing another (latent) virus such as HHV-6 or HHV-7 to reactivate. Indeed, it has been described that SARS-CoV-2 may act as a transactivator agent triggering HHV-6/HHV-7 reactivation, thereby indirectly causing PR clinical manifestation.¹⁰

To the Editor:

We read with interest the September 2023 Cutis article by Swink et al,¹ “Cat Scratch Disease Presenting With Concurrent Pityriasis Rosea in a 10-Year-Old Girl.” The authors documented the possibility of Bartonella henselae infection as another causative agent for pityriasis rosea (PR) even though the association of PR with human herpesvirus (HHV) 6 and HHV-7 infection is based on several consistent observations and not on occasional findings. The association of PR with endogenous systemic reactivation of HHV-6 and HHV-7 has been identified with different investigations and laboratory techniques. Using polymerase chain reaction, real-time calibrated quantitative polymerase chain reaction, in situ hybridization, immunohistochemistry, and electron microscopy, HHV-6 and HHV-7 have been detected in plasma (a marker of active viral replication), peripheral blood mononuclear cells, and skin lesions from patients with PR.² In addition, HHV-6 and HHV-7 messenger RNA expression and their specific antigens have been detected in PR skin lesions and herpesvirus virions in various stages of morphogenesis as well as in the supernatant of co-cultured peripheral blood mononuclear cells of patients with PR.^2,3 Lastly, the increased levels of several particular cytokines and chemokinesin the sera of patients with PR support a viral role in its pathogenesis.⁴

Bartonella henselae is a gram-negative intracellular facultative bacterium that is commonly implicated in causing zoonotic infections worldwide. The incidence of cat-scratch disease (CSD) was reported to be 6.4 cases per 100,000 population in adults and 9.4 cases per 100,000 population in children aged 5 to 9 years globally.⁵ Approximately 24,000 cases of CSD are reported in the United States every year.⁶ Therefore, considering these data, if B henselae was a causative agent for PR, the eruption would be observed frequently in many patients with CSD, which is not the case. On the contrary, it is possible that B henselae infection may have reactivated HHV-6 and/or HHV-7 infection. It is well established that B henselae causes a robust cell-mediated immune response by activating natural killer and helper T cells (T_H1) and enhancement of cytotoxic T lymphocytes.⁷ It could be assumed that by strongly stimulating the immune response and polarizing it to a specific antigen cell response, B henselae infection may temporarily distract the T cell-mediated control of the latent infections, such as HHV-6 and HHV-7, which may reactivate and cause PR.

It is important to point out that a case of concomitant B henselae and Epstein-Barr virus infection has been described.⁸ Even in that case, the B henselae infection may have reactivated Epstein-Barr virus as well as HHV-6 and HHV-7 in the case described by Swink et al.¹ Epstein-Barr virus reactivation has been detected in one case⁸ through serologic testing—IgM, IgG, Epstein-Barr virus nuclear antigen IgG, and heterophile antibodies—as there were no dermatologic manifestations that may be related to Epstein-Barr virus reactivation from latency.⁹

In conclusion, a viral or bacterial infection such as Epstein-Barr virus or B henselae may have a transactivating function allowing another (latent) virus such as HHV-6 or HHV-7 to reactivate. Indeed, it has been described that SARS-CoV-2 may act as a transactivator agent triggering HHV-6/HHV-7 reactivation, thereby indirectly causing PR clinical manifestation.¹⁰

To the Editor:

We read with interest the September 2023 Cutis article by Swink et al,¹ “Cat Scratch Disease Presenting With Concurrent Pityriasis Rosea in a 10-Year-Old Girl.” The authors documented the possibility of Bartonella henselae infection as another causative agent for pityriasis rosea (PR) even though the association of PR with human herpesvirus (HHV) 6 and HHV-7 infection is based on several consistent observations and not on occasional findings. The association of PR with endogenous systemic reactivation of HHV-6 and HHV-7 has been identified with different investigations and laboratory techniques. Using polymerase chain reaction, real-time calibrated quantitative polymerase chain reaction, in situ hybridization, immunohistochemistry, and electron microscopy, HHV-6 and HHV-7 have been detected in plasma (a marker of active viral replication), peripheral blood mononuclear cells, and skin lesions from patients with PR.² In addition, HHV-6 and HHV-7 messenger RNA expression and their specific antigens have been detected in PR skin lesions and herpesvirus virions in various stages of morphogenesis as well as in the supernatant of co-cultured peripheral blood mononuclear cells of patients with PR.^2,3 Lastly, the increased levels of several particular cytokines and chemokinesin the sera of patients with PR support a viral role in its pathogenesis.⁴

Bartonella henselae is a gram-negative intracellular facultative bacterium that is commonly implicated in causing zoonotic infections worldwide. The incidence of cat-scratch disease (CSD) was reported to be 6.4 cases per 100,000 population in adults and 9.4 cases per 100,000 population in children aged 5 to 9 years globally.⁵ Approximately 24,000 cases of CSD are reported in the United States every year.⁶ Therefore, considering these data, if B henselae was a causative agent for PR, the eruption would be observed frequently in many patients with CSD, which is not the case. On the contrary, it is possible that B henselae infection may have reactivated HHV-6 and/or HHV-7 infection. It is well established that B henselae causes a robust cell-mediated immune response by activating natural killer and helper T cells (T_H1) and enhancement of cytotoxic T lymphocytes.⁷ It could be assumed that by strongly stimulating the immune response and polarizing it to a specific antigen cell response, B henselae infection may temporarily distract the T cell-mediated control of the latent infections, such as HHV-6 and HHV-7, which may reactivate and cause PR.

It is important to point out that a case of concomitant B henselae and Epstein-Barr virus infection has been described.⁸ Even in that case, the B henselae infection may have reactivated Epstein-Barr virus as well as HHV-6 and HHV-7 in the case described by Swink et al.¹ Epstein-Barr virus reactivation has been detected in one case⁸ through serologic testing—IgM, IgG, Epstein-Barr virus nuclear antigen IgG, and heterophile antibodies—as there were no dermatologic manifestations that may be related to Epstein-Barr virus reactivation from latency.⁹

In conclusion, a viral or bacterial infection such as Epstein-Barr virus or B henselae may have a transactivating function allowing another (latent) virus such as HHV-6 or HHV-7 to reactivate. Indeed, it has been described that SARS-CoV-2 may act as a transactivator agent triggering HHV-6/HHV-7 reactivation, thereby indirectly causing PR clinical manifestation.¹⁰

To the Editor:

Cellulitis is the most common reason for skin-related hospital admissions.¹ Despite its frequency, it is suspected that many cases of cellulitis are misdiagnosed as other etiologies presenting with similar symptoms such as a ruptured Baker cyst. These cysts are located behind the knee and can present with calf pain, peripheral edema, and erythema when ruptured. Symptoms of a ruptured Baker cyst can be indistinguishable from cellulitis as well as deep vein thrombosis (DVT), both manifesting with lower extremity pain, swelling, and erythema, making diagnosis challenging.² The hemorrhagic crescent sign—a crescent of ecchymosis distal to the medial malleolus and on the foot that results from synovial injury or rupture—can be a useful diagnostic tool to differentiate between the causes of acute swelling and pain of the leg.² When observed, the hemorrhagic crescent sign supports testing for synovial pathology at the knee.

A 63-year-old man presented to an outside hospital for evaluation of a fever (temperature, 101 °F [38.3 °C]), as well as pain, edema, and erythema of the right lower leg of 2 days’ duration. He had a history of leg cellulitis, gout, diabetes mellitus, lymphedema, and peripheral neuropathy. On admission, he was found to have elevated C-reactive protein (45 mg/L [reference range, <8 mg/L]) and mild leukocytosis (13,500 cells/μL [reference range, 4500–11,000 cells/μL]). A venous duplex scan did not demonstrate signs of thrombosis. Antibiotic therapy was started for suspected cellulitis including levofloxacin, piperacillin-tazobactam, and linezolid. Despite broad-spectrum antibiotic coverage, the patient continued to be febrile and experienced progressive erythema and swelling of the right lower leg, at which point he was transferred to our institution. A new antibiotic regimen of vancomycin, cefepime, and clindamycin was started and showed no improvement, after which dermatology was consulted.

Physical examination revealed unilateral edema and calor of the right lower leg with a demarcated erythematous rash extending to the level of the knee. Furthermore, a hemorrhagic crescent sign was present below the right medial malleolus (Figure). The popliteal fossa was supple, though the patient was adamant that he had a Baker cyst. Punch biopsies demonstrated epidermal spongiosis and extensive edema with perivascular inflammation. No organisms were found by stain and culture. Ultrasound records confirmed a Baker cyst present at least 4 months prior; however, a repeat ultrasound showed resolution. A diagnosis of pseudocellulitis secondary to Baker cyst rupture was made, and corticosteroids were started, resulting in marked reduction in erythema and edema of the lower leg and hospital discharge.

This case highlights the importance of early involvement of dermatology when cellulitis is suspected. A study of 635 patients in the United Kingdom referred to dermatology for lower limb cellulitis found that 210 (33%) patients did not have cellulitis and only 18 (3%) required hospital admission.³ Dermatology consultations have been shown to benefit patients with inflammatory skin disease by decreasing length of stay and reducing readmissions.⁴

Our patient had several risk factors for cellulitis, including obesity, lymphedema, and chronic kidney disease, in addition to having fevers and unilateral involvement. However, failure of symptoms to improve with broad-spectrum antibiotics made a diagnosis of cellulitis less likely. In this case, a severe immune response to the ruptured Baker cyst mimicked the presentation of cellulitis.

Ruptured Baker cysts have been reported to cause acute leg swelling, mimicking the symptoms of cellulitis or DVT.^2,5 The presence of a hemorrhagic crescent sign can be a useful diagnostic tool, as in our patient, because it has been reported as an indication of synovial injury or rupture, supporting the exclusion of cellulitis or DVT when it is observed.⁶ Prior reports have observed ecchymosis on the foot in as little as 1 day after the onset of calf swelling and at the lateral malleolus 3 days after the onset of calf swelling.⁵

Following suspicion of a ruptured Baker cyst causing pseudocellulitis, an ultrasound can be used to confirm the diagnosis. Ultrasonography shows a large hypoechoic space behind the calf muscles, which is pathognomonic of a ruptured Baker cyst.⁷

In conclusion, when a hemorrhagic crescent sign is observed, one should be suspicious for a ruptured Baker cyst or other synovial pathology as an etiology of pseudocellulitis. Early recognition of the hemorrhagic crescent sign can help rule out cellulitis and DVT, thereby reducing the amount of intravenous antibiotic prescribed, decreasing the length of hospital stay, and reducing readmission.

To the Editor:

Cellulitis is the most common reason for skin-related hospital admissions.¹ Despite its frequency, it is suspected that many cases of cellulitis are misdiagnosed as other etiologies presenting with similar symptoms such as a ruptured Baker cyst. These cysts are located behind the knee and can present with calf pain, peripheral edema, and erythema when ruptured. Symptoms of a ruptured Baker cyst can be indistinguishable from cellulitis as well as deep vein thrombosis (DVT), both manifesting with lower extremity pain, swelling, and erythema, making diagnosis challenging.² The hemorrhagic crescent sign—a crescent of ecchymosis distal to the medial malleolus and on the foot that results from synovial injury or rupture—can be a useful diagnostic tool to differentiate between the causes of acute swelling and pain of the leg.² When observed, the hemorrhagic crescent sign supports testing for synovial pathology at the knee.

A 63-year-old man presented to an outside hospital for evaluation of a fever (temperature, 101 °F [38.3 °C]), as well as pain, edema, and erythema of the right lower leg of 2 days’ duration. He had a history of leg cellulitis, gout, diabetes mellitus, lymphedema, and peripheral neuropathy. On admission, he was found to have elevated C-reactive protein (45 mg/L [reference range, <8 mg/L]) and mild leukocytosis (13,500 cells/μL [reference range, 4500–11,000 cells/μL]). A venous duplex scan did not demonstrate signs of thrombosis. Antibiotic therapy was started for suspected cellulitis including levofloxacin, piperacillin-tazobactam, and linezolid. Despite broad-spectrum antibiotic coverage, the patient continued to be febrile and experienced progressive erythema and swelling of the right lower leg, at which point he was transferred to our institution. A new antibiotic regimen of vancomycin, cefepime, and clindamycin was started and showed no improvement, after which dermatology was consulted.

Physical examination revealed unilateral edema and calor of the right lower leg with a demarcated erythematous rash extending to the level of the knee. Furthermore, a hemorrhagic crescent sign was present below the right medial malleolus (Figure). The popliteal fossa was supple, though the patient was adamant that he had a Baker cyst. Punch biopsies demonstrated epidermal spongiosis and extensive edema with perivascular inflammation. No organisms were found by stain and culture. Ultrasound records confirmed a Baker cyst present at least 4 months prior; however, a repeat ultrasound showed resolution. A diagnosis of pseudocellulitis secondary to Baker cyst rupture was made, and corticosteroids were started, resulting in marked reduction in erythema and edema of the lower leg and hospital discharge.

This case highlights the importance of early involvement of dermatology when cellulitis is suspected. A study of 635 patients in the United Kingdom referred to dermatology for lower limb cellulitis found that 210 (33%) patients did not have cellulitis and only 18 (3%) required hospital admission.³ Dermatology consultations have been shown to benefit patients with inflammatory skin disease by decreasing length of stay and reducing readmissions.⁴

Our patient had several risk factors for cellulitis, including obesity, lymphedema, and chronic kidney disease, in addition to having fevers and unilateral involvement. However, failure of symptoms to improve with broad-spectrum antibiotics made a diagnosis of cellulitis less likely. In this case, a severe immune response to the ruptured Baker cyst mimicked the presentation of cellulitis.

Ruptured Baker cysts have been reported to cause acute leg swelling, mimicking the symptoms of cellulitis or DVT.^2,5 The presence of a hemorrhagic crescent sign can be a useful diagnostic tool, as in our patient, because it has been reported as an indication of synovial injury or rupture, supporting the exclusion of cellulitis or DVT when it is observed.⁶ Prior reports have observed ecchymosis on the foot in as little as 1 day after the onset of calf swelling and at the lateral malleolus 3 days after the onset of calf swelling.⁵

Following suspicion of a ruptured Baker cyst causing pseudocellulitis, an ultrasound can be used to confirm the diagnosis. Ultrasonography shows a large hypoechoic space behind the calf muscles, which is pathognomonic of a ruptured Baker cyst.⁷

In conclusion, when a hemorrhagic crescent sign is observed, one should be suspicious for a ruptured Baker cyst or other synovial pathology as an etiology of pseudocellulitis. Early recognition of the hemorrhagic crescent sign can help rule out cellulitis and DVT, thereby reducing the amount of intravenous antibiotic prescribed, decreasing the length of hospital stay, and reducing readmission.

To the Editor:

Cellulitis is the most common reason for skin-related hospital admissions.¹ Despite its frequency, it is suspected that many cases of cellulitis are misdiagnosed as other etiologies presenting with similar symptoms such as a ruptured Baker cyst. These cysts are located behind the knee and can present with calf pain, peripheral edema, and erythema when ruptured. Symptoms of a ruptured Baker cyst can be indistinguishable from cellulitis as well as deep vein thrombosis (DVT), both manifesting with lower extremity pain, swelling, and erythema, making diagnosis challenging.² The hemorrhagic crescent sign—a crescent of ecchymosis distal to the medial malleolus and on the foot that results from synovial injury or rupture—can be a useful diagnostic tool to differentiate between the causes of acute swelling and pain of the leg.² When observed, the hemorrhagic crescent sign supports testing for synovial pathology at the knee.

A 63-year-old man presented to an outside hospital for evaluation of a fever (temperature, 101 °F [38.3 °C]), as well as pain, edema, and erythema of the right lower leg of 2 days’ duration. He had a history of leg cellulitis, gout, diabetes mellitus, lymphedema, and peripheral neuropathy. On admission, he was found to have elevated C-reactive protein (45 mg/L [reference range, <8 mg/L]) and mild leukocytosis (13,500 cells/μL [reference range, 4500–11,000 cells/μL]). A venous duplex scan did not demonstrate signs of thrombosis. Antibiotic therapy was started for suspected cellulitis including levofloxacin, piperacillin-tazobactam, and linezolid. Despite broad-spectrum antibiotic coverage, the patient continued to be febrile and experienced progressive erythema and swelling of the right lower leg, at which point he was transferred to our institution. A new antibiotic regimen of vancomycin, cefepime, and clindamycin was started and showed no improvement, after which dermatology was consulted.

Physical examination revealed unilateral edema and calor of the right lower leg with a demarcated erythematous rash extending to the level of the knee. Furthermore, a hemorrhagic crescent sign was present below the right medial malleolus (Figure). The popliteal fossa was supple, though the patient was adamant that he had a Baker cyst. Punch biopsies demonstrated epidermal spongiosis and extensive edema with perivascular inflammation. No organisms were found by stain and culture. Ultrasound records confirmed a Baker cyst present at least 4 months prior; however, a repeat ultrasound showed resolution. A diagnosis of pseudocellulitis secondary to Baker cyst rupture was made, and corticosteroids were started, resulting in marked reduction in erythema and edema of the lower leg and hospital discharge.

This case highlights the importance of early involvement of dermatology when cellulitis is suspected. A study of 635 patients in the United Kingdom referred to dermatology for lower limb cellulitis found that 210 (33%) patients did not have cellulitis and only 18 (3%) required hospital admission.³ Dermatology consultations have been shown to benefit patients with inflammatory skin disease by decreasing length of stay and reducing readmissions.⁴

Our patient had several risk factors for cellulitis, including obesity, lymphedema, and chronic kidney disease, in addition to having fevers and unilateral involvement. However, failure of symptoms to improve with broad-spectrum antibiotics made a diagnosis of cellulitis less likely. In this case, a severe immune response to the ruptured Baker cyst mimicked the presentation of cellulitis.

Ruptured Baker cysts have been reported to cause acute leg swelling, mimicking the symptoms of cellulitis or DVT.^2,5 The presence of a hemorrhagic crescent sign can be a useful diagnostic tool, as in our patient, because it has been reported as an indication of synovial injury or rupture, supporting the exclusion of cellulitis or DVT when it is observed.⁶ Prior reports have observed ecchymosis on the foot in as little as 1 day after the onset of calf swelling and at the lateral malleolus 3 days after the onset of calf swelling.⁵

Following suspicion of a ruptured Baker cyst causing pseudocellulitis, an ultrasound can be used to confirm the diagnosis. Ultrasonography shows a large hypoechoic space behind the calf muscles, which is pathognomonic of a ruptured Baker cyst.⁷

In conclusion, when a hemorrhagic crescent sign is observed, one should be suspicious for a ruptured Baker cyst or other synovial pathology as an etiology of pseudocellulitis. Early recognition of the hemorrhagic crescent sign can help rule out cellulitis and DVT, thereby reducing the amount of intravenous antibiotic prescribed, decreasing the length of hospital stay, and reducing readmission.

The Food and Drug Administration (FDA) has approved letibotulinumtoxinA-wlbg, an injectable neurotoxin long used in South Korea for the treatment of moderate to severe glabellar (frown) lines in adults. Developed by Hugel, the product is being marketed under the brand name Letybo.

The FDA’s approval was based on positive results from three phase 3 trials of letibotulinumtoxinA-wlbg that enrolled more than 1000 individuals in the United States and Europe. According to information in the package insert, the most common adverse reaction reported in the trials was headache, which occurred in 2% of trial participants. Other adverse events reported by fewer than 1% of trial participants included brow ptosis, eyelid ptosis, and blepharospasm, while the most frequently reported injection site reactions included administrative site swelling, facial pain, folliculitis, and periorbital hematoma.

According to a press release from the company, letibotulinumtoxinA-wlbg has been the leading neurotoxin brand in South Korea for 7 consecutive years, and the product has been sold in more than 50 different countries. Hugel plans to launch Letybo for US-based aesthetic clinicians in the latter half of 2024.

A version of this article appeared on Medscape.com.

The Food and Drug Administration (FDA) has approved letibotulinumtoxinA-wlbg, an injectable neurotoxin long used in South Korea for the treatment of moderate to severe glabellar (frown) lines in adults. Developed by Hugel, the product is being marketed under the brand name Letybo.

The FDA’s approval was based on positive results from three phase 3 trials of letibotulinumtoxinA-wlbg that enrolled more than 1000 individuals in the United States and Europe. According to information in the package insert, the most common adverse reaction reported in the trials was headache, which occurred in 2% of trial participants. Other adverse events reported by fewer than 1% of trial participants included brow ptosis, eyelid ptosis, and blepharospasm, while the most frequently reported injection site reactions included administrative site swelling, facial pain, folliculitis, and periorbital hematoma.

According to a press release from the company, letibotulinumtoxinA-wlbg has been the leading neurotoxin brand in South Korea for 7 consecutive years, and the product has been sold in more than 50 different countries. Hugel plans to launch Letybo for US-based aesthetic clinicians in the latter half of 2024.

A version of this article appeared on Medscape.com.

The Food and Drug Administration (FDA) has approved letibotulinumtoxinA-wlbg, an injectable neurotoxin long used in South Korea for the treatment of moderate to severe glabellar (frown) lines in adults. Developed by Hugel, the product is being marketed under the brand name Letybo.

The FDA’s approval was based on positive results from three phase 3 trials of letibotulinumtoxinA-wlbg that enrolled more than 1000 individuals in the United States and Europe. According to information in the package insert, the most common adverse reaction reported in the trials was headache, which occurred in 2% of trial participants. Other adverse events reported by fewer than 1% of trial participants included brow ptosis, eyelid ptosis, and blepharospasm, while the most frequently reported injection site reactions included administrative site swelling, facial pain, folliculitis, and periorbital hematoma.

According to a press release from the company, letibotulinumtoxinA-wlbg has been the leading neurotoxin brand in South Korea for 7 consecutive years, and the product has been sold in more than 50 different countries. Hugel plans to launch Letybo for US-based aesthetic clinicians in the latter half of 2024.

A version of this article appeared on Medscape.com.

The Diagnosis: Gastric Acid Dermatitis

After further discussion, the patient indicated that he had vomited during the night of alcohol consumption, and the vomitus remained on the affected areas until the next morning, indicating that excessive alcohol ingestion stimulated abundant secretion of gastric acid, which caused the symptoms. Additionally, the presence of clothing acted as a buffer in the unaffected areas, which helped make the final diagnosis of gastric acid dermatitis. The patient was treated with external application of recombinant bovine basic fibroblast growth factor gel (21,000 IU/5 g) once daily, and the lesions greatly improved within 7 days. The burning pain of the throat, stomach, and esophagus resolved after consultation with an otolaryngologist and a gastroenterologist.

Gastric acid dermatitis is a new term used to describe an acute skin burn caused by the patient's own gastric acid. Generally, the pH of human gastric acid is between 0.9 and 1.8 but will be diluted after eating and will gradually increase to approximately 3.5, which is not enough to induce burns on the skin.¹ In addition, the skin barrier is capable of preventing transient gastric acid corrosion.^2,3 However, the release of a large amount of gastric acid after excessive alcohol ingestion coupled with 1 night of lethargy left enough acid and time to induce skin burns in our patient.

Dermatitis caused by other allergic or chemical factors, such as Paederus dermatitis, was excluded, as the patient’s manifestation occurred during the inactive period of Paederus fuscipes. Furthermore, the patient denied any history of contact with chemicals in the last month. Food eruptions primarily manifest as systemic anaphylaxis with eruptive and pruritic rashes after consumption of seafood, eggs, milk, or other proteins, while alcoholic contact dermatitis is a form of irritating dermatitis that could be easily induced again by direct skin contact with alcohol.

Management of gastric acid dermatitis is similar to that for other chemical burns. Because scarring seldom occurs, the central issue is to restore the skin barrier as quickly as possible and to avoid or alleviate postinflammatory hyperpigmentation. Treatments to restore the skin barrier include recombinant bovine or human-derived basic fibroblast growth factor gel, moist exposed burn ointment, and medical sodium hyaluronate gelatin. To treat postinflammatory hyperpigmentation, some whitening agents such as compound superoxide dismutase arbutin cream and hydroquinone cream as well as the Q-switched Nd:YAG laser are effective to ameliorate the skin condition. If skin burns are on sun-exposed areas, photoprotection is necessary to prevent hyperpigmentation.

Acknowledgment—We thank the patient for granting permission to publish this information.

The Diagnosis: Gastric Acid Dermatitis

After further discussion, the patient indicated that he had vomited during the night of alcohol consumption, and the vomitus remained on the affected areas until the next morning, indicating that excessive alcohol ingestion stimulated abundant secretion of gastric acid, which caused the symptoms. Additionally, the presence of clothing acted as a buffer in the unaffected areas, which helped make the final diagnosis of gastric acid dermatitis. The patient was treated with external application of recombinant bovine basic fibroblast growth factor gel (21,000 IU/5 g) once daily, and the lesions greatly improved within 7 days. The burning pain of the throat, stomach, and esophagus resolved after consultation with an otolaryngologist and a gastroenterologist.

Gastric acid dermatitis is a new term used to describe an acute skin burn caused by the patient's own gastric acid. Generally, the pH of human gastric acid is between 0.9 and 1.8 but will be diluted after eating and will gradually increase to approximately 3.5, which is not enough to induce burns on the skin.¹ In addition, the skin barrier is capable of preventing transient gastric acid corrosion.^2,3 However, the release of a large amount of gastric acid after excessive alcohol ingestion coupled with 1 night of lethargy left enough acid and time to induce skin burns in our patient.

Dermatitis caused by other allergic or chemical factors, such as Paederus dermatitis, was excluded, as the patient’s manifestation occurred during the inactive period of Paederus fuscipes. Furthermore, the patient denied any history of contact with chemicals in the last month. Food eruptions primarily manifest as systemic anaphylaxis with eruptive and pruritic rashes after consumption of seafood, eggs, milk, or other proteins, while alcoholic contact dermatitis is a form of irritating dermatitis that could be easily induced again by direct skin contact with alcohol.

Management of gastric acid dermatitis is similar to that for other chemical burns. Because scarring seldom occurs, the central issue is to restore the skin barrier as quickly as possible and to avoid or alleviate postinflammatory hyperpigmentation. Treatments to restore the skin barrier include recombinant bovine or human-derived basic fibroblast growth factor gel, moist exposed burn ointment, and medical sodium hyaluronate gelatin. To treat postinflammatory hyperpigmentation, some whitening agents such as compound superoxide dismutase arbutin cream and hydroquinone cream as well as the Q-switched Nd:YAG laser are effective to ameliorate the skin condition. If skin burns are on sun-exposed areas, photoprotection is necessary to prevent hyperpigmentation.

Acknowledgment—We thank the patient for granting permission to publish this information.

The Diagnosis: Gastric Acid Dermatitis

After further discussion, the patient indicated that he had vomited during the night of alcohol consumption, and the vomitus remained on the affected areas until the next morning, indicating that excessive alcohol ingestion stimulated abundant secretion of gastric acid, which caused the symptoms. Additionally, the presence of clothing acted as a buffer in the unaffected areas, which helped make the final diagnosis of gastric acid dermatitis. The patient was treated with external application of recombinant bovine basic fibroblast growth factor gel (21,000 IU/5 g) once daily, and the lesions greatly improved within 7 days. The burning pain of the throat, stomach, and esophagus resolved after consultation with an otolaryngologist and a gastroenterologist.

Gastric acid dermatitis is a new term used to describe an acute skin burn caused by the patient's own gastric acid. Generally, the pH of human gastric acid is between 0.9 and 1.8 but will be diluted after eating and will gradually increase to approximately 3.5, which is not enough to induce burns on the skin.¹ In addition, the skin barrier is capable of preventing transient gastric acid corrosion.^2,3 However, the release of a large amount of gastric acid after excessive alcohol ingestion coupled with 1 night of lethargy left enough acid and time to induce skin burns in our patient.

Dermatitis caused by other allergic or chemical factors, such as Paederus dermatitis, was excluded, as the patient’s manifestation occurred during the inactive period of Paederus fuscipes. Furthermore, the patient denied any history of contact with chemicals in the last month. Food eruptions primarily manifest as systemic anaphylaxis with eruptive and pruritic rashes after consumption of seafood, eggs, milk, or other proteins, while alcoholic contact dermatitis is a form of irritating dermatitis that could be easily induced again by direct skin contact with alcohol.

Management of gastric acid dermatitis is similar to that for other chemical burns. Because scarring seldom occurs, the central issue is to restore the skin barrier as quickly as possible and to avoid or alleviate postinflammatory hyperpigmentation. Treatments to restore the skin barrier include recombinant bovine or human-derived basic fibroblast growth factor gel, moist exposed burn ointment, and medical sodium hyaluronate gelatin. To treat postinflammatory hyperpigmentation, some whitening agents such as compound superoxide dismutase arbutin cream and hydroquinone cream as well as the Q-switched Nd:YAG laser are effective to ameliorate the skin condition. If skin burns are on sun-exposed areas, photoprotection is necessary to prevent hyperpigmentation.

Acknowledgment—We thank the patient for granting permission to publish this information.

Photographs courtesy of Richard P. Usatine, MD.

THE COMPARISON

A Melanoma in situ manifesting as longitudinal melanonychia (LM) in a single digit in a Black man. Dermoscopy showed irregular dark bands of brown pigmentation and micro-Hutchinson sign on the cuticle (inset).

B Melanoma manifesting as LM with a prominent Hutchinson sign in a Hispanic man, with variable shades of brown covering more than 50% of the nail width.

C Longitudinal melanonychia of at least 2 nails with a pseudo-Hutchinson sign (pigment on the nail folds in a benign case of LM) in a young Black man demonstrating ethnic/racial melanosis. The longitudinal bands, which were caused by benign melanocytic activation, are more gray than brown and are less than 3 mm wide.

Longitudinal melanonychia (LM) is a pigmented linear band—brown, black, or gray—spanning the length of the nail plate due to the presence of excess melanin, which may be attributed to a benign or malignant process and may warrant further investigation.^1,2 The majority of patients who present with LM are diagnosed with melanocytic activation of the nail matrix due to their inherent darker skin tone or various triggers including trauma, infection, and medications. Longitudinal melanonychia secondary to melanocytic activation often occurs spontaneously in patients with skin of color.³ Less commonly, LM is caused by a nail matrix nevus or lentigo; however, LM may arise secondary to subungual melanoma, a more dangerous cause.

A thorough clinical history including duration, recent changes in LM manifestation, nail trauma, or infection is helpful in evaluating patients with LM; however, a history of nail trauma can be misleading, as nail changes attributed to the trauma may in fact be melanoma. Irregularly spaced vertical lines of pigmentation ranging from brown to black with variations in spacing and width are characteristic of subungual melanoma.⁴ Nail dystrophy, granular hyperpigmentation, and Hutchinson sign (extension of pigmentation to the nail folds) also are worrisome features.⁵ In recent years, dermoscopy has become an important tool in the clinical examination of LM, with the development of criteria based on color and pattern recognition.^5,6 Dermoscopy can be useful in screening potential candidates for biopsy. Although clinical examination and dermoscopy are essential to evaluating LM, the gold-standard diagnostic test when malignancy is suspected is a nail matrix biopsy.^1,2,6,7

Epidemiology

It is not unusual for patients with darker skin tones to develop LM due to melanocytic activation of multiple nails with age. This finding can be seen in approximately 80% of African American individuals, 30% of Japanese individuals, and 50% of Hispanic individuals.² It has even been reported that approximately 100% of Black patients older than 50 years will have evidence of LM.³

In a retrospective analysis, children presenting with LM tend to have a higher prevalence of nail matrix nevi compared to adults (56.1% [60/106] vs 34.3% [23/66]; P=.005).⁸ Involvement of a single digit in children is most likely indicative of a nevus; however, when an adult presents with LM in a single digit, suspicion for subungual melanoma should be raised.^2,3,9

Two separate single-center retrospective studies showed the prevalence of subungual melanoma in patients presenting with melanonychia in Asia. Jin et al10 reported subungual melanoma in 6.2% (17/275) of Korean patients presenting with melanonychia at a general dermatology clinic from 2002 to 2014. Lyu et al⁸ studied LM in 172 Chinese patients in a dermatology clinic from 2018 to 2021 and reported 9% (6/66) of adults (aged ≥18 years) with subungual melanoma, with no reported cases in childhood (aged <18 years).

Although the prevalence of subungual melanoma in patients with LM is low, it is an important diagnosis that should not be missed. In confirmed cases of subungual melanoma, two-thirds of lesions manifested as LM.^3,10,11 Thus, LM arising in an adult in a single digit is more concerning for malignancy.^2,3,7,9

Individuals of African and Asian descent as well as American Indian individuals are at highest risk for subungual melanoma with a poor prognosis compared to other types of melanoma, largely due to diagnosis at an advanced stage of disease.^3,9 In a retrospective study of 25 patients with surgically treated subungual melanoma, the mean recurrence-free survival was 33.6 months. The recurrence-free survival was 66% at 1 year and 40% at 3 years, and the overall survival rate was 37% at 3 years.¹²

Key clinical features in individuals with darker skin tones

• In patients with darker skin tones, LM tends to occur on multiple nails as a result of melanocytic activation.^2,13
• Several longitudinal bands may be noted on the same nail and the pigmentation of the bands may vary. With age, these longitudinal bands typically increase in number and width.¹³
• Pseudo-Hutchinson sign may be present due to ethnic melanosis of the proximal nail fold.^13,14
• Dermoscopic findings of LM in patients with skin of color include wider bands (P=.0125), lower band brightness (P<.032), and higher frequency of changing appearance of bands (P=.0071).¹⁵

Worth noting

When patients present with LM, thorough examination of the nail plate, periungual skin, and distal pulp of all digits on all extremities with adequate lighting is important.² Dermoscopy is useful, and a gel interface helps for examining the nail plates.⁷

Clinicians should be encouraged to biopsy or immediately refer patients with concerning nail unit lesions. Cases of LM most likely are benign, but if some doubt exists, the lesions should be biopsied or tracked closely with clinical and dermoscopic images, with a biopsy if changes occur.¹⁶ In conjunction with evaluation by a qualified clinician, patients also should be encouraged to take photographs, as the evolution of nail changes is a critical part of clinical decision-making on the need for a biopsy or referral.

Health disparity highlight

Despite the disproportionately high mortality rates from subungual melanoma in Black and Hispanic populations,^3,9 studies often do not adequately represent these populations. Although subungual melanoma is rare, a delay in the diagnosis contributes to high morbidity and mortality rates.

Photographs courtesy of Richard P. Usatine, MD.

THE COMPARISON

A Melanoma in situ manifesting as longitudinal melanonychia (LM) in a single digit in a Black man. Dermoscopy showed irregular dark bands of brown pigmentation and micro-Hutchinson sign on the cuticle (inset).

B Melanoma manifesting as LM with a prominent Hutchinson sign in a Hispanic man, with variable shades of brown covering more than 50% of the nail width.

C Longitudinal melanonychia of at least 2 nails with a pseudo-Hutchinson sign (pigment on the nail folds in a benign case of LM) in a young Black man demonstrating ethnic/racial melanosis. The longitudinal bands, which were caused by benign melanocytic activation, are more gray than brown and are less than 3 mm wide.

Longitudinal melanonychia (LM) is a pigmented linear band—brown, black, or gray—spanning the length of the nail plate due to the presence of excess melanin, which may be attributed to a benign or malignant process and may warrant further investigation.^1,2 The majority of patients who present with LM are diagnosed with melanocytic activation of the nail matrix due to their inherent darker skin tone or various triggers including trauma, infection, and medications. Longitudinal melanonychia secondary to melanocytic activation often occurs spontaneously in patients with skin of color.³ Less commonly, LM is caused by a nail matrix nevus or lentigo; however, LM may arise secondary to subungual melanoma, a more dangerous cause.

A thorough clinical history including duration, recent changes in LM manifestation, nail trauma, or infection is helpful in evaluating patients with LM; however, a history of nail trauma can be misleading, as nail changes attributed to the trauma may in fact be melanoma. Irregularly spaced vertical lines of pigmentation ranging from brown to black with variations in spacing and width are characteristic of subungual melanoma.⁴ Nail dystrophy, granular hyperpigmentation, and Hutchinson sign (extension of pigmentation to the nail folds) also are worrisome features.⁵ In recent years, dermoscopy has become an important tool in the clinical examination of LM, with the development of criteria based on color and pattern recognition.^5,6 Dermoscopy can be useful in screening potential candidates for biopsy. Although clinical examination and dermoscopy are essential to evaluating LM, the gold-standard diagnostic test when malignancy is suspected is a nail matrix biopsy.^1,2,6,7

Epidemiology

It is not unusual for patients with darker skin tones to develop LM due to melanocytic activation of multiple nails with age. This finding can be seen in approximately 80% of African American individuals, 30% of Japanese individuals, and 50% of Hispanic individuals.² It has even been reported that approximately 100% of Black patients older than 50 years will have evidence of LM.³

In a retrospective analysis, children presenting with LM tend to have a higher prevalence of nail matrix nevi compared to adults (56.1% [60/106] vs 34.3% [23/66]; P=.005).⁸ Involvement of a single digit in children is most likely indicative of a nevus; however, when an adult presents with LM in a single digit, suspicion for subungual melanoma should be raised.^2,3,9

Two separate single-center retrospective studies showed the prevalence of subungual melanoma in patients presenting with melanonychia in Asia. Jin et al10 reported subungual melanoma in 6.2% (17/275) of Korean patients presenting with melanonychia at a general dermatology clinic from 2002 to 2014. Lyu et al⁸ studied LM in 172 Chinese patients in a dermatology clinic from 2018 to 2021 and reported 9% (6/66) of adults (aged ≥18 years) with subungual melanoma, with no reported cases in childhood (aged <18 years).

Although the prevalence of subungual melanoma in patients with LM is low, it is an important diagnosis that should not be missed. In confirmed cases of subungual melanoma, two-thirds of lesions manifested as LM.^3,10,11 Thus, LM arising in an adult in a single digit is more concerning for malignancy.^2,3,7,9

Individuals of African and Asian descent as well as American Indian individuals are at highest risk for subungual melanoma with a poor prognosis compared to other types of melanoma, largely due to diagnosis at an advanced stage of disease.^3,9 In a retrospective study of 25 patients with surgically treated subungual melanoma, the mean recurrence-free survival was 33.6 months. The recurrence-free survival was 66% at 1 year and 40% at 3 years, and the overall survival rate was 37% at 3 years.¹²

Key clinical features in individuals with darker skin tones

• In patients with darker skin tones, LM tends to occur on multiple nails as a result of melanocytic activation.^2,13
• Several longitudinal bands may be noted on the same nail and the pigmentation of the bands may vary. With age, these longitudinal bands typically increase in number and width.¹³
• Pseudo-Hutchinson sign may be present due to ethnic melanosis of the proximal nail fold.^13,14
• Dermoscopic findings of LM in patients with skin of color include wider bands (P=.0125), lower band brightness (P<.032), and higher frequency of changing appearance of bands (P=.0071).¹⁵

Worth noting

When patients present with LM, thorough examination of the nail plate, periungual skin, and distal pulp of all digits on all extremities with adequate lighting is important.² Dermoscopy is useful, and a gel interface helps for examining the nail plates.⁷

Clinicians should be encouraged to biopsy or immediately refer patients with concerning nail unit lesions. Cases of LM most likely are benign, but if some doubt exists, the lesions should be biopsied or tracked closely with clinical and dermoscopic images, with a biopsy if changes occur.¹⁶ In conjunction with evaluation by a qualified clinician, patients also should be encouraged to take photographs, as the evolution of nail changes is a critical part of clinical decision-making on the need for a biopsy or referral.

Health disparity highlight

Despite the disproportionately high mortality rates from subungual melanoma in Black and Hispanic populations,^3,9 studies often do not adequately represent these populations. Although subungual melanoma is rare, a delay in the diagnosis contributes to high morbidity and mortality rates.

Photographs courtesy of Richard P. Usatine, MD.

THE COMPARISON

A Melanoma in situ manifesting as longitudinal melanonychia (LM) in a single digit in a Black man. Dermoscopy showed irregular dark bands of brown pigmentation and micro-Hutchinson sign on the cuticle (inset).

B Melanoma manifesting as LM with a prominent Hutchinson sign in a Hispanic man, with variable shades of brown covering more than 50% of the nail width.

C Longitudinal melanonychia of at least 2 nails with a pseudo-Hutchinson sign (pigment on the nail folds in a benign case of LM) in a young Black man demonstrating ethnic/racial melanosis. The longitudinal bands, which were caused by benign melanocytic activation, are more gray than brown and are less than 3 mm wide.

Longitudinal melanonychia (LM) is a pigmented linear band—brown, black, or gray—spanning the length of the nail plate due to the presence of excess melanin, which may be attributed to a benign or malignant process and may warrant further investigation.^1,2 The majority of patients who present with LM are diagnosed with melanocytic activation of the nail matrix due to their inherent darker skin tone or various triggers including trauma, infection, and medications. Longitudinal melanonychia secondary to melanocytic activation often occurs spontaneously in patients with skin of color.³ Less commonly, LM is caused by a nail matrix nevus or lentigo; however, LM may arise secondary to subungual melanoma, a more dangerous cause.

A thorough clinical history including duration, recent changes in LM manifestation, nail trauma, or infection is helpful in evaluating patients with LM; however, a history of nail trauma can be misleading, as nail changes attributed to the trauma may in fact be melanoma. Irregularly spaced vertical lines of pigmentation ranging from brown to black with variations in spacing and width are characteristic of subungual melanoma.⁴ Nail dystrophy, granular hyperpigmentation, and Hutchinson sign (extension of pigmentation to the nail folds) also are worrisome features.⁵ In recent years, dermoscopy has become an important tool in the clinical examination of LM, with the development of criteria based on color and pattern recognition.^5,6 Dermoscopy can be useful in screening potential candidates for biopsy. Although clinical examination and dermoscopy are essential to evaluating LM, the gold-standard diagnostic test when malignancy is suspected is a nail matrix biopsy.^1,2,6,7

Epidemiology

It is not unusual for patients with darker skin tones to develop LM due to melanocytic activation of multiple nails with age. This finding can be seen in approximately 80% of African American individuals, 30% of Japanese individuals, and 50% of Hispanic individuals.² It has even been reported that approximately 100% of Black patients older than 50 years will have evidence of LM.³

In a retrospective analysis, children presenting with LM tend to have a higher prevalence of nail matrix nevi compared to adults (56.1% [60/106] vs 34.3% [23/66]; P=.005).⁸ Involvement of a single digit in children is most likely indicative of a nevus; however, when an adult presents with LM in a single digit, suspicion for subungual melanoma should be raised.^2,3,9

Two separate single-center retrospective studies showed the prevalence of subungual melanoma in patients presenting with melanonychia in Asia. Jin et al10 reported subungual melanoma in 6.2% (17/275) of Korean patients presenting with melanonychia at a general dermatology clinic from 2002 to 2014. Lyu et al⁸ studied LM in 172 Chinese patients in a dermatology clinic from 2018 to 2021 and reported 9% (6/66) of adults (aged ≥18 years) with subungual melanoma, with no reported cases in childhood (aged <18 years).

Although the prevalence of subungual melanoma in patients with LM is low, it is an important diagnosis that should not be missed. In confirmed cases of subungual melanoma, two-thirds of lesions manifested as LM.^3,10,11 Thus, LM arising in an adult in a single digit is more concerning for malignancy.^2,3,7,9

Individuals of African and Asian descent as well as American Indian individuals are at highest risk for subungual melanoma with a poor prognosis compared to other types of melanoma, largely due to diagnosis at an advanced stage of disease.^3,9 In a retrospective study of 25 patients with surgically treated subungual melanoma, the mean recurrence-free survival was 33.6 months. The recurrence-free survival was 66% at 1 year and 40% at 3 years, and the overall survival rate was 37% at 3 years.¹²

Key clinical features in individuals with darker skin tones

• In patients with darker skin tones, LM tends to occur on multiple nails as a result of melanocytic activation.^2,13
• Several longitudinal bands may be noted on the same nail and the pigmentation of the bands may vary. With age, these longitudinal bands typically increase in number and width.¹³
• Pseudo-Hutchinson sign may be present due to ethnic melanosis of the proximal nail fold.^13,14
• Dermoscopic findings of LM in patients with skin of color include wider bands (P=.0125), lower band brightness (P<.032), and higher frequency of changing appearance of bands (P=.0071).¹⁵

Worth noting

When patients present with LM, thorough examination of the nail plate, periungual skin, and distal pulp of all digits on all extremities with adequate lighting is important.² Dermoscopy is useful, and a gel interface helps for examining the nail plates.⁷

Clinicians should be encouraged to biopsy or immediately refer patients with concerning nail unit lesions. Cases of LM most likely are benign, but if some doubt exists, the lesions should be biopsied or tracked closely with clinical and dermoscopic images, with a biopsy if changes occur.¹⁶ In conjunction with evaluation by a qualified clinician, patients also should be encouraged to take photographs, as the evolution of nail changes is a critical part of clinical decision-making on the need for a biopsy or referral.

Health disparity highlight

Despite the disproportionately high mortality rates from subungual melanoma in Black and Hispanic populations,^3,9 studies often do not adequately represent these populations. Although subungual melanoma is rare, a delay in the diagnosis contributes to high morbidity and mortality rates.

Hidradenitis suppurativa (HS)—a chronic, relapsing, inflammatory disorder involving terminal hair follicles in apocrine gland–rich skin—manifests as tender inflamed nodules that transform into abscesses, sinus tracts, and scarring.^1,2 The etiology of HS is multifactorial, encompassing lifestyle, microbiota, hormonal status, and genetic and environmental factors. These factors activate the immune system around the terminal hair follicles and lead to hyperkeratosis of the infundibulum of the hair follicles in intertriginous regions. This progresses to follicular occlusion, stasis, and eventual rupture. Bacterial multiplication within the plugged pilosebaceous units further boosts immune activation. Resident and migrated cells of the innate and adaptive immune system then release proinflammatory cytokines such as tumor necrosis factor, IL-1β, and IL-17, which further enhance immune cell influx and inflammation.^3,4 This aberrant immune response propagates the production of deep-seated inflammatory nodules and abscesses.^3-8

The estimated prevalence of HS is 1% worldwide.⁹ It is more prevalent in female and Black patients (0.30%) than White patients (0.09%) and is intermediate in prevalence in the biracial population (0.22%).¹⁰ Hidradenitis suppurativa is thought to be associated with lower socioeconomic status (SES). In a retrospective analysis of HS patients (N=375), approximately one-third of patients were Black, had advanced disease, and had a notably lower SES.¹¹ Furthermore, HS has been reported to be associated with systemic inflammation and comorbidities such as morbid obesity (38.3%) and hypertension (39.6%) as well as other metabolic syndrome–related disorders and depression (48.1%).¹

Hidradenitis suppurativa may contribute to the risk for depression through its substantial impact on health-related quality of life, which culminates in social withdrawal, unemployment, and suicidal thoughts.¹² The high prevalence of depression in individuals with HS¹ and its association with systemic inflammation¹³ increases the likelihood that a common genetic predisposition also may exist between both conditions. Because depression frequently has been discovered as a concomitant diagnosis in patients with HS, we hypothesize that a shared genetic susceptibility also may exist between the 2 disorders. Our study sought to explore data on the co-occurrence of depression with HS, including its demographics and racial data.

Methods

We conducted a PubMed search of articles indexed for MEDLINE as well as Google Scholar using the terms depression and hidradenitis suppurativa to obtain all research articles published from 2000 to 2022. Articles were selected based on relevance to the topic of exploration. English-language articles that directly addressed the epidemiology, etiology, pathophysiology, and co-occurrence of both depression and HS with numerical data were included. Articles were excluded if they did not explore the information of interest on these 2 disorders or did not contain clear statistical data of patients with the 2 concurrent medical conditions.

Results

Twenty-two cross-sectional, prospective, and retrospective studies that fit the search criteria were identified and included in the analysis (eTable).^1,14-34 Sixteen (72.7%) studies were cross-sectional, 5 (22.7%) were retrospective, and only 1 (4.5%) was a prospective study. Only 6 of the studies provided racial data,^{1,14,17,26,28,32} and of them, 4 had predominately White patients,^1,14,26,32 whereas the other 2 had predominantly Black patients.^17,28

Hidradenitis suppurativa was found to coexist with depression in all the studies, with a prevalence of 1.2% to 48.1%. There also was a higher prevalence of depression in HS patients than in the control patients without HS. Furthermore, a recent study by Wright and colleagues¹⁴ stratified the depression prevalence data by age and found a higher prevalence of depression in adults vs children with HS (30% vs 12%).

Comment

Major depression—a chronic and debilitating illness—is the chief cause of disability globally and in the United States alone and has a global lifetime prevalence of 17%.³⁵ In a study of 388 patients diagnosed with depression and 404 community-matched controls who were observed for 10 years, depressed patients had a two-thirds higher likelihood of developing a serious physical illness than controls. The depression-associated elevated risk for serious physical illness persisted after controlling for confounding variables such as alcohol abuse, smoking, and level of physical activity.³⁶ Studies also have demonstrated that HS is more prevalent in Black individuals¹⁰ and in individuals of low SES,³⁷ who are mostly the Black and Hispanic populations that experience the highest burden of racial microaggression³⁸ and disparities in health access and outcomes.^39,40 The severity and chronicity of major depressive disorder also is higher in Black patients compared with White patients (57% vs 39%).⁴¹ Because major depression and HS are most common among Black patients who experience the highest-burden negative financial and health disparities, there may be a shared genetic disposition to both medical conditions.

Moreover, the common detrimental lifestyle choices associated with patients with depression and HS also suggest the possibility of a collective genetic susceptibility. Patients with depression also report increased consumption of alcohol, tobacco, and illicit substances; sedentary lifestyle leading to obesity; and poor compliance with prescribed medical treatment.⁴² Smoking and obesity are known contributors to the pathogenesis of HS, and their modification also is known to positively impact the disease course. In a retrospective single-cohort study, 50% of obese HS patients (n=35) reported a substantial decrease in disease severity after a reduction of more than 15% in body mass index over 2 years following bariatric surgery (n=35).⁴³ Patients with HS also have reported disease remission following extensive weight loss.⁴⁴ In addition, evidence has supported smoking cessation in improving the disease course of HS.⁴³ Because these detrimental lifestyle choices are prevalent in both patients with HS and those with depression, a co-genetic susceptibility also may exist.

Furthermore, depression is characterized by a persistent inflammatory state,^13,45 similar to HS.⁴⁶ Elevated levels of a variety of inflammatory markers, such as C-reactive protein (CRP), IL-6, and soluble intercellular adhesion molecule 1, have been reported in patients with depression compared with healthy controls.^13,45 Further analysis found a positive correlation and a strong association between depression and these inflammatory markers.⁴⁷ Moreover, adipokines regulate inflammatory responses, and adipokines play a role in the pathogenesis of HS. Adipokine levels such as elevated omentin-1 (a recently identified adipokine) were found to be altered in patients with HS compared with controls.⁴⁸ Results from clinical studies and meta-analyses of patients with depression also have demonstrated that adipokines are dysregulated in this population,^49,50 which may be another potential genetic link between depression and HS.

In addition, genetic susceptibility to depression and HS may be shared because the inflammatory markers that have a strong association with depression also have been found to play an important role in HS treatment and disease severity prediction. In a retrospective cohort study of 404 patients, CRP or IL-6 levels were found to be reliable predictors of HS disease severity, which may explain why anti–tumor necrosis factor antibody regimens such as adalimumab and infliximab have clinically ameliorated disease activity in several cases of HS.⁵¹ In a study evaluating these drugs, high baseline levels of high-sensitivity CRP and IL-6 were predictive of patient response to infliximab.⁵² In a meta-analysis evaluating 20,791 participants, an association was found between concurrent depression and CRP. Furthermore, inflammation measured by high levels of CRP or IL-6 was observed to predict future depression.⁵³ If the same inflammatory markers—CRP and IL-6—both play a major role in the disease activity of depression and HS, then a concurrent genetic predisposition may exist.

Conclusion

Understanding the comorbidities, etiologies, and risk factors for the development and progression of HS is an important step toward improved disease management. Available studies on comorbid depression in HS largely involve White patients, and more studies are needed in patients with skin of color, particularly the Black population, who have the highest prevalence of HS.¹⁰ Given the evidence for an association between depression and HS, we suggest a large-scale investigation of this patient population that includes a complete medical history, onset of HS in comparison to the onset of depression, and specific measures of disease progress and lifetime management of depression, which may help to increase knowledge about the role of depression in HS and encourage more research in this area. If shared genetic susceptibility is established, aggressive management of depression in patients at risk for HS may reduce disease incidence and severity as well as the psychological burden on patients.

Hidradenitis suppurativa (HS)—a chronic, relapsing, inflammatory disorder involving terminal hair follicles in apocrine gland–rich skin—manifests as tender inflamed nodules that transform into abscesses, sinus tracts, and scarring.^1,2 The etiology of HS is multifactorial, encompassing lifestyle, microbiota, hormonal status, and genetic and environmental factors. These factors activate the immune system around the terminal hair follicles and lead to hyperkeratosis of the infundibulum of the hair follicles in intertriginous regions. This progresses to follicular occlusion, stasis, and eventual rupture. Bacterial multiplication within the plugged pilosebaceous units further boosts immune activation. Resident and migrated cells of the innate and adaptive immune system then release proinflammatory cytokines such as tumor necrosis factor, IL-1β, and IL-17, which further enhance immune cell influx and inflammation.^3,4 This aberrant immune response propagates the production of deep-seated inflammatory nodules and abscesses.^3-8

The estimated prevalence of HS is 1% worldwide.⁹ It is more prevalent in female and Black patients (0.30%) than White patients (0.09%) and is intermediate in prevalence in the biracial population (0.22%).¹⁰ Hidradenitis suppurativa is thought to be associated with lower socioeconomic status (SES). In a retrospective analysis of HS patients (N=375), approximately one-third of patients were Black, had advanced disease, and had a notably lower SES.¹¹ Furthermore, HS has been reported to be associated with systemic inflammation and comorbidities such as morbid obesity (38.3%) and hypertension (39.6%) as well as other metabolic syndrome–related disorders and depression (48.1%).¹

Hidradenitis suppurativa may contribute to the risk for depression through its substantial impact on health-related quality of life, which culminates in social withdrawal, unemployment, and suicidal thoughts.¹² The high prevalence of depression in individuals with HS¹ and its association with systemic inflammation¹³ increases the likelihood that a common genetic predisposition also may exist between both conditions. Because depression frequently has been discovered as a concomitant diagnosis in patients with HS, we hypothesize that a shared genetic susceptibility also may exist between the 2 disorders. Our study sought to explore data on the co-occurrence of depression with HS, including its demographics and racial data.

Methods

We conducted a PubMed search of articles indexed for MEDLINE as well as Google Scholar using the terms depression and hidradenitis suppurativa to obtain all research articles published from 2000 to 2022. Articles were selected based on relevance to the topic of exploration. English-language articles that directly addressed the epidemiology, etiology, pathophysiology, and co-occurrence of both depression and HS with numerical data were included. Articles were excluded if they did not explore the information of interest on these 2 disorders or did not contain clear statistical data of patients with the 2 concurrent medical conditions.

Results

Twenty-two cross-sectional, prospective, and retrospective studies that fit the search criteria were identified and included in the analysis (eTable).^1,14-34 Sixteen (72.7%) studies were cross-sectional, 5 (22.7%) were retrospective, and only 1 (4.5%) was a prospective study. Only 6 of the studies provided racial data,^{1,14,17,26,28,32} and of them, 4 had predominately White patients,^1,14,26,32 whereas the other 2 had predominantly Black patients.^17,28

Hidradenitis suppurativa was found to coexist with depression in all the studies, with a prevalence of 1.2% to 48.1%. There also was a higher prevalence of depression in HS patients than in the control patients without HS. Furthermore, a recent study by Wright and colleagues¹⁴ stratified the depression prevalence data by age and found a higher prevalence of depression in adults vs children with HS (30% vs 12%).

Comment

Major depression—a chronic and debilitating illness—is the chief cause of disability globally and in the United States alone and has a global lifetime prevalence of 17%.³⁵ In a study of 388 patients diagnosed with depression and 404 community-matched controls who were observed for 10 years, depressed patients had a two-thirds higher likelihood of developing a serious physical illness than controls. The depression-associated elevated risk for serious physical illness persisted after controlling for confounding variables such as alcohol abuse, smoking, and level of physical activity.³⁶ Studies also have demonstrated that HS is more prevalent in Black individuals¹⁰ and in individuals of low SES,³⁷ who are mostly the Black and Hispanic populations that experience the highest burden of racial microaggression³⁸ and disparities in health access and outcomes.^39,40 The severity and chronicity of major depressive disorder also is higher in Black patients compared with White patients (57% vs 39%).⁴¹ Because major depression and HS are most common among Black patients who experience the highest-burden negative financial and health disparities, there may be a shared genetic disposition to both medical conditions.

Moreover, the common detrimental lifestyle choices associated with patients with depression and HS also suggest the possibility of a collective genetic susceptibility. Patients with depression also report increased consumption of alcohol, tobacco, and illicit substances; sedentary lifestyle leading to obesity; and poor compliance with prescribed medical treatment.⁴² Smoking and obesity are known contributors to the pathogenesis of HS, and their modification also is known to positively impact the disease course. In a retrospective single-cohort study, 50% of obese HS patients (n=35) reported a substantial decrease in disease severity after a reduction of more than 15% in body mass index over 2 years following bariatric surgery (n=35).⁴³ Patients with HS also have reported disease remission following extensive weight loss.⁴⁴ In addition, evidence has supported smoking cessation in improving the disease course of HS.⁴³ Because these detrimental lifestyle choices are prevalent in both patients with HS and those with depression, a co-genetic susceptibility also may exist.

Furthermore, depression is characterized by a persistent inflammatory state,^13,45 similar to HS.⁴⁶ Elevated levels of a variety of inflammatory markers, such as C-reactive protein (CRP), IL-6, and soluble intercellular adhesion molecule 1, have been reported in patients with depression compared with healthy controls.^13,45 Further analysis found a positive correlation and a strong association between depression and these inflammatory markers.⁴⁷ Moreover, adipokines regulate inflammatory responses, and adipokines play a role in the pathogenesis of HS. Adipokine levels such as elevated omentin-1 (a recently identified adipokine) were found to be altered in patients with HS compared with controls.⁴⁸ Results from clinical studies and meta-analyses of patients with depression also have demonstrated that adipokines are dysregulated in this population,^49,50 which may be another potential genetic link between depression and HS.

In addition, genetic susceptibility to depression and HS may be shared because the inflammatory markers that have a strong association with depression also have been found to play an important role in HS treatment and disease severity prediction. In a retrospective cohort study of 404 patients, CRP or IL-6 levels were found to be reliable predictors of HS disease severity, which may explain why anti–tumor necrosis factor antibody regimens such as adalimumab and infliximab have clinically ameliorated disease activity in several cases of HS.⁵¹ In a study evaluating these drugs, high baseline levels of high-sensitivity CRP and IL-6 were predictive of patient response to infliximab.⁵² In a meta-analysis evaluating 20,791 participants, an association was found between concurrent depression and CRP. Furthermore, inflammation measured by high levels of CRP or IL-6 was observed to predict future depression.⁵³ If the same inflammatory markers—CRP and IL-6—both play a major role in the disease activity of depression and HS, then a concurrent genetic predisposition may exist.

Conclusion

Understanding the comorbidities, etiologies, and risk factors for the development and progression of HS is an important step toward improved disease management. Available studies on comorbid depression in HS largely involve White patients, and more studies are needed in patients with skin of color, particularly the Black population, who have the highest prevalence of HS.¹⁰ Given the evidence for an association between depression and HS, we suggest a large-scale investigation of this patient population that includes a complete medical history, onset of HS in comparison to the onset of depression, and specific measures of disease progress and lifetime management of depression, which may help to increase knowledge about the role of depression in HS and encourage more research in this area. If shared genetic susceptibility is established, aggressive management of depression in patients at risk for HS may reduce disease incidence and severity as well as the psychological burden on patients.

Hidradenitis suppurativa (HS)—a chronic, relapsing, inflammatory disorder involving terminal hair follicles in apocrine gland–rich skin—manifests as tender inflamed nodules that transform into abscesses, sinus tracts, and scarring.^1,2 The etiology of HS is multifactorial, encompassing lifestyle, microbiota, hormonal status, and genetic and environmental factors. These factors activate the immune system around the terminal hair follicles and lead to hyperkeratosis of the infundibulum of the hair follicles in intertriginous regions. This progresses to follicular occlusion, stasis, and eventual rupture. Bacterial multiplication within the plugged pilosebaceous units further boosts immune activation. Resident and migrated cells of the innate and adaptive immune system then release proinflammatory cytokines such as tumor necrosis factor, IL-1β, and IL-17, which further enhance immune cell influx and inflammation.^3,4 This aberrant immune response propagates the production of deep-seated inflammatory nodules and abscesses.^3-8

The estimated prevalence of HS is 1% worldwide.⁹ It is more prevalent in female and Black patients (0.30%) than White patients (0.09%) and is intermediate in prevalence in the biracial population (0.22%).¹⁰ Hidradenitis suppurativa is thought to be associated with lower socioeconomic status (SES). In a retrospective analysis of HS patients (N=375), approximately one-third of patients were Black, had advanced disease, and had a notably lower SES.¹¹ Furthermore, HS has been reported to be associated with systemic inflammation and comorbidities such as morbid obesity (38.3%) and hypertension (39.6%) as well as other metabolic syndrome–related disorders and depression (48.1%).¹

Hidradenitis suppurativa may contribute to the risk for depression through its substantial impact on health-related quality of life, which culminates in social withdrawal, unemployment, and suicidal thoughts.¹² The high prevalence of depression in individuals with HS¹ and its association with systemic inflammation¹³ increases the likelihood that a common genetic predisposition also may exist between both conditions. Because depression frequently has been discovered as a concomitant diagnosis in patients with HS, we hypothesize that a shared genetic susceptibility also may exist between the 2 disorders. Our study sought to explore data on the co-occurrence of depression with HS, including its demographics and racial data.

Methods

We conducted a PubMed search of articles indexed for MEDLINE as well as Google Scholar using the terms depression and hidradenitis suppurativa to obtain all research articles published from 2000 to 2022. Articles were selected based on relevance to the topic of exploration. English-language articles that directly addressed the epidemiology, etiology, pathophysiology, and co-occurrence of both depression and HS with numerical data were included. Articles were excluded if they did not explore the information of interest on these 2 disorders or did not contain clear statistical data of patients with the 2 concurrent medical conditions.

Results

Twenty-two cross-sectional, prospective, and retrospective studies that fit the search criteria were identified and included in the analysis (eTable).^1,14-34 Sixteen (72.7%) studies were cross-sectional, 5 (22.7%) were retrospective, and only 1 (4.5%) was a prospective study. Only 6 of the studies provided racial data,^{1,14,17,26,28,32} and of them, 4 had predominately White patients,^1,14,26,32 whereas the other 2 had predominantly Black patients.^17,28

Hidradenitis suppurativa was found to coexist with depression in all the studies, with a prevalence of 1.2% to 48.1%. There also was a higher prevalence of depression in HS patients than in the control patients without HS. Furthermore, a recent study by Wright and colleagues¹⁴ stratified the depression prevalence data by age and found a higher prevalence of depression in adults vs children with HS (30% vs 12%).

Comment

Major depression—a chronic and debilitating illness—is the chief cause of disability globally and in the United States alone and has a global lifetime prevalence of 17%.³⁵ In a study of 388 patients diagnosed with depression and 404 community-matched controls who were observed for 10 years, depressed patients had a two-thirds higher likelihood of developing a serious physical illness than controls. The depression-associated elevated risk for serious physical illness persisted after controlling for confounding variables such as alcohol abuse, smoking, and level of physical activity.³⁶ Studies also have demonstrated that HS is more prevalent in Black individuals¹⁰ and in individuals of low SES,³⁷ who are mostly the Black and Hispanic populations that experience the highest burden of racial microaggression³⁸ and disparities in health access and outcomes.^39,40 The severity and chronicity of major depressive disorder also is higher in Black patients compared with White patients (57% vs 39%).⁴¹ Because major depression and HS are most common among Black patients who experience the highest-burden negative financial and health disparities, there may be a shared genetic disposition to both medical conditions.

Moreover, the common detrimental lifestyle choices associated with patients with depression and HS also suggest the possibility of a collective genetic susceptibility. Patients with depression also report increased consumption of alcohol, tobacco, and illicit substances; sedentary lifestyle leading to obesity; and poor compliance with prescribed medical treatment.⁴² Smoking and obesity are known contributors to the pathogenesis of HS, and their modification also is known to positively impact the disease course. In a retrospective single-cohort study, 50% of obese HS patients (n=35) reported a substantial decrease in disease severity after a reduction of more than 15% in body mass index over 2 years following bariatric surgery (n=35).⁴³ Patients with HS also have reported disease remission following extensive weight loss.⁴⁴ In addition, evidence has supported smoking cessation in improving the disease course of HS.⁴³ Because these detrimental lifestyle choices are prevalent in both patients with HS and those with depression, a co-genetic susceptibility also may exist.

Furthermore, depression is characterized by a persistent inflammatory state,^13,45 similar to HS.⁴⁶ Elevated levels of a variety of inflammatory markers, such as C-reactive protein (CRP), IL-6, and soluble intercellular adhesion molecule 1, have been reported in patients with depression compared with healthy controls.^13,45 Further analysis found a positive correlation and a strong association between depression and these inflammatory markers.⁴⁷ Moreover, adipokines regulate inflammatory responses, and adipokines play a role in the pathogenesis of HS. Adipokine levels such as elevated omentin-1 (a recently identified adipokine) were found to be altered in patients with HS compared with controls.⁴⁸ Results from clinical studies and meta-analyses of patients with depression also have demonstrated that adipokines are dysregulated in this population,^49,50 which may be another potential genetic link between depression and HS.

In addition, genetic susceptibility to depression and HS may be shared because the inflammatory markers that have a strong association with depression also have been found to play an important role in HS treatment and disease severity prediction. In a retrospective cohort study of 404 patients, CRP or IL-6 levels were found to be reliable predictors of HS disease severity, which may explain why anti–tumor necrosis factor antibody regimens such as adalimumab and infliximab have clinically ameliorated disease activity in several cases of HS.⁵¹ In a study evaluating these drugs, high baseline levels of high-sensitivity CRP and IL-6 were predictive of patient response to infliximab.⁵² In a meta-analysis evaluating 20,791 participants, an association was found between concurrent depression and CRP. Furthermore, inflammation measured by high levels of CRP or IL-6 was observed to predict future depression.⁵³ If the same inflammatory markers—CRP and IL-6—both play a major role in the disease activity of depression and HS, then a concurrent genetic predisposition may exist.

Conclusion

Understanding the comorbidities, etiologies, and risk factors for the development and progression of HS is an important step toward improved disease management. Available studies on comorbid depression in HS largely involve White patients, and more studies are needed in patients with skin of color, particularly the Black population, who have the highest prevalence of HS.¹⁰ Given the evidence for an association between depression and HS, we suggest a large-scale investigation of this patient population that includes a complete medical history, onset of HS in comparison to the onset of depression, and specific measures of disease progress and lifetime management of depression, which may help to increase knowledge about the role of depression in HS and encourage more research in this area. If shared genetic susceptibility is established, aggressive management of depression in patients at risk for HS may reduce disease incidence and severity as well as the psychological burden on patients.