MDedge Dermatology

“More than Jews have kept Shabbat, Shabbat has kept the Jews.” – Ahad Ha’am

You should all be well rested by now. After all, we’ve just come through the festive shutdown of the holiday season where all of your pumpkin/peppermint/marshmallow flavored coffees were sipped while walking around in your jimjams at 10 a.m. It was the time of year for you to take time off to get a proper rest and be energized to get back to work. Yet, I’m not feeling it from you.

So let’s talk about burnout – just kidding, that would only make it worse. “Burned-out’’ is a hackneyed and defective phrase to describe what many of us are feeling. We are not “destroyed, gutted by fire or by overheating.” No, we are, as one of our docs put it to me: “Just tired.” Ah, a much better Old English word! “Tired” captures it. It means to feel “in need of rest.” We are not ruined, we are just depleted. We don’t need discarding. We need some rest.

Ironically, this column, like most of mine, comes to you after my having written it on a Saturday and Sunday. I also just logged on to my EMR and checked results, renewed a few prescriptions, and answered a couple messages. If I didn’t, my Monday’s work would be crushingly heavy.

Maybe I need to be more efficient and finish my work during the week. Or maybe I need to realize that work has not let up since about 600 BCE and taking one day off each week to rest is an obligation to myself, my family and my community.

I wonder if I can choose Mondays.

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

“More than Jews have kept Shabbat, Shabbat has kept the Jews.” – Ahad Ha’am

You should all be well rested by now. After all, we’ve just come through the festive shutdown of the holiday season where all of your pumpkin/peppermint/marshmallow flavored coffees were sipped while walking around in your jimjams at 10 a.m. It was the time of year for you to take time off to get a proper rest and be energized to get back to work. Yet, I’m not feeling it from you.

So let’s talk about burnout – just kidding, that would only make it worse. “Burned-out’’ is a hackneyed and defective phrase to describe what many of us are feeling. We are not “destroyed, gutted by fire or by overheating.” No, we are, as one of our docs put it to me: “Just tired.” Ah, a much better Old English word! “Tired” captures it. It means to feel “in need of rest.” We are not ruined, we are just depleted. We don’t need discarding. We need some rest.

Ironically, this column, like most of mine, comes to you after my having written it on a Saturday and Sunday. I also just logged on to my EMR and checked results, renewed a few prescriptions, and answered a couple messages. If I didn’t, my Monday’s work would be crushingly heavy.

Maybe I need to be more efficient and finish my work during the week. Or maybe I need to realize that work has not let up since about 600 BCE and taking one day off each week to rest is an obligation to myself, my family and my community.

I wonder if I can choose Mondays.

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

“More than Jews have kept Shabbat, Shabbat has kept the Jews.” – Ahad Ha’am

You should all be well rested by now. After all, we’ve just come through the festive shutdown of the holiday season where all of your pumpkin/peppermint/marshmallow flavored coffees were sipped while walking around in your jimjams at 10 a.m. It was the time of year for you to take time off to get a proper rest and be energized to get back to work. Yet, I’m not feeling it from you.

So let’s talk about burnout – just kidding, that would only make it worse. “Burned-out’’ is a hackneyed and defective phrase to describe what many of us are feeling. We are not “destroyed, gutted by fire or by overheating.” No, we are, as one of our docs put it to me: “Just tired.” Ah, a much better Old English word! “Tired” captures it. It means to feel “in need of rest.” We are not ruined, we are just depleted. We don’t need discarding. We need some rest.

Ironically, this column, like most of mine, comes to you after my having written it on a Saturday and Sunday. I also just logged on to my EMR and checked results, renewed a few prescriptions, and answered a couple messages. If I didn’t, my Monday’s work would be crushingly heavy.

Maybe I need to be more efficient and finish my work during the week. Or maybe I need to realize that work has not let up since about 600 BCE and taking one day off each week to rest is an obligation to myself, my family and my community.

I wonder if I can choose Mondays.

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

Contact dermatitis is a common problem in the floral bulb industry and is considered an occupational disease. Daffodils (Narcissus species)(Figure) are thought to be the most common cause of irritant contact dermatitis among florists.¹

Clinical Importance

Picking daffodils can start as early as October, when the flowers are still closed. The picker’s hand slides down the stem to snap the stalk at the base. This potentially traumatic maneuver to the web of the fingers leads to abrasions, which are irritated by the sap and cause granulomatous sores and paronychia. An experienced picker can pick 20,000 flowers a day, leading to extensive contact with sap.²

Eczematous or granulomatous rash on the arms also is seen as the sap irritates the wrist and forearm. The pickers often hold the flowers until a bunch of 10 has been collected. The 10 flowers are held together by a rubber band and stacked along the arm, the chin, and the axilla, causing the rash to extend to those areas. Sap also can be transferred by the hand to other parts of the body, such as the face. In men, sap can be transferred to the genitalia as the men urinate in the field.

Narcissus also can cause poisoning if ingested by humans or animals. Researchers who analyzed calls made to the New Zealand Natural Poisons Centre between 2003 and 2010 determined that daffodil was the 11th most common call for plant-related poisoning.³

Although the severity of plant poisoning often is low due to the small amount of plant material usually consumed, more severe poisoning can occur when the plant is eaten for medicinal purposes or mistaken for an edible plant.³ Vomiting, respiratory symptoms, abdominal pain, diarrhea, trembling, and convulsions can occur when daffodils are ingested. Death has been reported due to ingestion of the bulbs.⁴

In February 2010, 10 children aged 10 and 11 years and their 22-year-old guide presented to an emergency department in Israel after ingesting Narcissus bulbs, which were mistakenly believed to be the bulbs of onions.⁴ Eight children and the guide vomited. One child and the guide reported abdominal pain. All were discharged in stable condition after 4 hours of observation.⁴

Clinical Manifestations

Daffodil rash or lily rash was first described in 1910.⁵ The typical rash presents as dryness, fissures, scaling, and erythema of the fingertips, hands, and forearms, often with subungual hyperkeratosis. Vesicles and pustules may be seen. The rash may extend to other areas of the body, including the face.⁶

Use of protective gloves and clothing to avoid contact with the plant is recommended.² Treatment includes stopping contact with the irritant, eye irrigation, and supportive measures (airway, breathing, and circulation). Activated charcoal can be helpful if used within 1 hour after ingestion but is contraindicated in vomiting patients.⁴

Identifying Features

The genus Narcissus is in the family Amaryllidaceae and contains ornamental plants, including daffodil (trumpet Narcissus, Narcissus pseudonarcissus), jonquil (Narcissus jonquilla), and poet’s narcissus (Narcissus poeticus). Most species are perennial; the plant emerges from a bulb in spring. Leaves originate from the base of the plant and range from 5-cm to 1.2-meters long, depending on the species. The flowers span a range of shapes and colors—from a trumpet (the daffodil) to a ringlike cup (poet’s Narcissus) and in yellow, white, and pink.⁷

Distribution and Plant Facts

Distribution—There are approximately 80 to 100 wild Narcissus species, which are found in southwestern Europe, North Africa, the Balkan Peninsula, Italy, and France. There are more than 27,000 Narcissus cultivars registered in the International Daffodil Register.⁸

Plant Facts—The daffodil is the national flower of Wales. It also is often used to depict hope and joy and is the symbol of cancer charities in many countries.⁹

The name Narcissus is believed to have originated from Greek mythology. A handsome youth, Narcissus, fell in love with his own reflection, for which the gods punished him by turning him into a flower.¹⁰

Another theory states that Narcissus is derived from the Greek word narkao (to benumb) due to its narcotic properties. When an open wound is subjected to an extract of the bulb, numbness of the entire nervous system is said to occur as well as paralysis of the heart. This narcotic effect led Socrates to refer to the Narcissus plant as the “chaplet of the infernal gods.”¹¹

Narcissus is an important flower in various ethnic rituals. The Greeks often planted daffodils near tombs. In Muslim culture, white is believed to be the symbol of good and purity; Narcissus was one of the most common white-flowered plants found in Muslim graveyards.¹²

Medicinal Qualities and Uses—Narcissus species have been used as medicinal plants for a variety of ailments. For example, Narcissus tazetta contains flavonoids, alkaloids, saponins, tannins, cardiac glycosides, oil, steroids, terpenoids, and anthraquinones that contribute to its antibacterial, antifungal, antiviral, antimalarial, anticancer, antioxidant, dermatologic, cardiovascular, immunomodulatory, and acetylcholinesterase inhibitory effects.¹³ In a study, chloroform extracts from N tazetta bulbs were found to be more active than doxorubicin against hepatocellular and colon cancer cell lines.¹⁴

More than 500 alkaloids have been isolated from the Narcissus genus.¹⁵ In 2001, the US Food and Drug Administration approved one of the alkaloids, galantamine, for the treatment of mild to moderate stages of Alzheimer disease.¹⁶ Galantamine selectively and reversibly inhibits acetylcholinesterase, the enzyme believed responsible for neurodegeneration seen in Alzheimer disease. Plants are the main source of galantamine, despite the ability of pharmaceutical companies to synthesize the compound. Galantamine hydrobromide is sold by prescription (Razadyne [Janssen Pharmaceuticals, Inc]); generic formulations approved by the US Food and Drug Administration have been produced by more than 15 pharmaceutical companies.^17,18

Irritant and Allergen

Sap found in the bulbs and hollow stems of Narcissus contains calcium oxalate crystals, or raphides. The minute, needle-shaped calcium oxalate crystals are believed to be a waste product of cellular metabolism.¹⁹ When the plant structure is compromised by pickers snapping the stalk, the sharp crystals penetrate the skin to cause an irritant contact dermatitis.

Relevant Research—A study used electron microscopy to characterize the structure of raphides from various plants,² though not from Narcissus species; the structure of each raphide was then compared to the degree of irritation it produced. The researchers concluded that more elongated crystals (those containing barbs) produce a greater degree of irritation. Narcissus species are known to cause varying degrees of skin irritation: For example, N tazetta rarely causes skin irritation, whereas N pseudonarcissi (daffodil) tends to cause remarkably more skin irritation.²

Allergic reactions to and strong toxicity from Narcissus species are not well understood. In a study, only 2 alkaloids—homolycorine and masonin—produced a weakly positive reaction in patch tests on sensitized guinea pigs, which correlates with the finding of a different study, in which only 2 of 12 patients whose findings were examined over 14 years had a positive patch test for Narcissus.^20,21

However, IgE-mediated allergies indicative of an allergic response to Narcissus have been reported. A study isolated an allergenic protein, narcin, from bulbs of N tazetta. Narcin is a 13-kDa protein with potent allergenic effects capable of inducing production of proinflammatory cytokines and increasing IgE levels in mononuclear cells in peripheral blood.²²

More research is required to find and understand the compounds responsible for causing an allergic reaction to Narcissus.

Contact dermatitis is a common problem in the floral bulb industry and is considered an occupational disease. Daffodils (Narcissus species)(Figure) are thought to be the most common cause of irritant contact dermatitis among florists.¹

Clinical Importance

Picking daffodils can start as early as October, when the flowers are still closed. The picker’s hand slides down the stem to snap the stalk at the base. This potentially traumatic maneuver to the web of the fingers leads to abrasions, which are irritated by the sap and cause granulomatous sores and paronychia. An experienced picker can pick 20,000 flowers a day, leading to extensive contact with sap.²

Eczematous or granulomatous rash on the arms also is seen as the sap irritates the wrist and forearm. The pickers often hold the flowers until a bunch of 10 has been collected. The 10 flowers are held together by a rubber band and stacked along the arm, the chin, and the axilla, causing the rash to extend to those areas. Sap also can be transferred by the hand to other parts of the body, such as the face. In men, sap can be transferred to the genitalia as the men urinate in the field.

Narcissus also can cause poisoning if ingested by humans or animals. Researchers who analyzed calls made to the New Zealand Natural Poisons Centre between 2003 and 2010 determined that daffodil was the 11th most common call for plant-related poisoning.³

Although the severity of plant poisoning often is low due to the small amount of plant material usually consumed, more severe poisoning can occur when the plant is eaten for medicinal purposes or mistaken for an edible plant.³ Vomiting, respiratory symptoms, abdominal pain, diarrhea, trembling, and convulsions can occur when daffodils are ingested. Death has been reported due to ingestion of the bulbs.⁴

In February 2010, 10 children aged 10 and 11 years and their 22-year-old guide presented to an emergency department in Israel after ingesting Narcissus bulbs, which were mistakenly believed to be the bulbs of onions.⁴ Eight children and the guide vomited. One child and the guide reported abdominal pain. All were discharged in stable condition after 4 hours of observation.⁴

Clinical Manifestations

Daffodil rash or lily rash was first described in 1910.⁵ The typical rash presents as dryness, fissures, scaling, and erythema of the fingertips, hands, and forearms, often with subungual hyperkeratosis. Vesicles and pustules may be seen. The rash may extend to other areas of the body, including the face.⁶

Use of protective gloves and clothing to avoid contact with the plant is recommended.² Treatment includes stopping contact with the irritant, eye irrigation, and supportive measures (airway, breathing, and circulation). Activated charcoal can be helpful if used within 1 hour after ingestion but is contraindicated in vomiting patients.⁴

Identifying Features

The genus Narcissus is in the family Amaryllidaceae and contains ornamental plants, including daffodil (trumpet Narcissus, Narcissus pseudonarcissus), jonquil (Narcissus jonquilla), and poet’s narcissus (Narcissus poeticus). Most species are perennial; the plant emerges from a bulb in spring. Leaves originate from the base of the plant and range from 5-cm to 1.2-meters long, depending on the species. The flowers span a range of shapes and colors—from a trumpet (the daffodil) to a ringlike cup (poet’s Narcissus) and in yellow, white, and pink.⁷

Distribution and Plant Facts

Distribution—There are approximately 80 to 100 wild Narcissus species, which are found in southwestern Europe, North Africa, the Balkan Peninsula, Italy, and France. There are more than 27,000 Narcissus cultivars registered in the International Daffodil Register.⁸

Plant Facts—The daffodil is the national flower of Wales. It also is often used to depict hope and joy and is the symbol of cancer charities in many countries.⁹

The name Narcissus is believed to have originated from Greek mythology. A handsome youth, Narcissus, fell in love with his own reflection, for which the gods punished him by turning him into a flower.¹⁰

Another theory states that Narcissus is derived from the Greek word narkao (to benumb) due to its narcotic properties. When an open wound is subjected to an extract of the bulb, numbness of the entire nervous system is said to occur as well as paralysis of the heart. This narcotic effect led Socrates to refer to the Narcissus plant as the “chaplet of the infernal gods.”¹¹

Narcissus is an important flower in various ethnic rituals. The Greeks often planted daffodils near tombs. In Muslim culture, white is believed to be the symbol of good and purity; Narcissus was one of the most common white-flowered plants found in Muslim graveyards.¹²

Medicinal Qualities and Uses—Narcissus species have been used as medicinal plants for a variety of ailments. For example, Narcissus tazetta contains flavonoids, alkaloids, saponins, tannins, cardiac glycosides, oil, steroids, terpenoids, and anthraquinones that contribute to its antibacterial, antifungal, antiviral, antimalarial, anticancer, antioxidant, dermatologic, cardiovascular, immunomodulatory, and acetylcholinesterase inhibitory effects.¹³ In a study, chloroform extracts from N tazetta bulbs were found to be more active than doxorubicin against hepatocellular and colon cancer cell lines.¹⁴

More than 500 alkaloids have been isolated from the Narcissus genus.¹⁵ In 2001, the US Food and Drug Administration approved one of the alkaloids, galantamine, for the treatment of mild to moderate stages of Alzheimer disease.¹⁶ Galantamine selectively and reversibly inhibits acetylcholinesterase, the enzyme believed responsible for neurodegeneration seen in Alzheimer disease. Plants are the main source of galantamine, despite the ability of pharmaceutical companies to synthesize the compound. Galantamine hydrobromide is sold by prescription (Razadyne [Janssen Pharmaceuticals, Inc]); generic formulations approved by the US Food and Drug Administration have been produced by more than 15 pharmaceutical companies.^17,18

Irritant and Allergen

Sap found in the bulbs and hollow stems of Narcissus contains calcium oxalate crystals, or raphides. The minute, needle-shaped calcium oxalate crystals are believed to be a waste product of cellular metabolism.¹⁹ When the plant structure is compromised by pickers snapping the stalk, the sharp crystals penetrate the skin to cause an irritant contact dermatitis.

Relevant Research—A study used electron microscopy to characterize the structure of raphides from various plants,² though not from Narcissus species; the structure of each raphide was then compared to the degree of irritation it produced. The researchers concluded that more elongated crystals (those containing barbs) produce a greater degree of irritation. Narcissus species are known to cause varying degrees of skin irritation: For example, N tazetta rarely causes skin irritation, whereas N pseudonarcissi (daffodil) tends to cause remarkably more skin irritation.²

Allergic reactions to and strong toxicity from Narcissus species are not well understood. In a study, only 2 alkaloids—homolycorine and masonin—produced a weakly positive reaction in patch tests on sensitized guinea pigs, which correlates with the finding of a different study, in which only 2 of 12 patients whose findings were examined over 14 years had a positive patch test for Narcissus.^20,21

However, IgE-mediated allergies indicative of an allergic response to Narcissus have been reported. A study isolated an allergenic protein, narcin, from bulbs of N tazetta. Narcin is a 13-kDa protein with potent allergenic effects capable of inducing production of proinflammatory cytokines and increasing IgE levels in mononuclear cells in peripheral blood.²²

More research is required to find and understand the compounds responsible for causing an allergic reaction to Narcissus.

Contact dermatitis is a common problem in the floral bulb industry and is considered an occupational disease. Daffodils (Narcissus species)(Figure) are thought to be the most common cause of irritant contact dermatitis among florists.¹

Clinical Importance

Picking daffodils can start as early as October, when the flowers are still closed. The picker’s hand slides down the stem to snap the stalk at the base. This potentially traumatic maneuver to the web of the fingers leads to abrasions, which are irritated by the sap and cause granulomatous sores and paronychia. An experienced picker can pick 20,000 flowers a day, leading to extensive contact with sap.²

Eczematous or granulomatous rash on the arms also is seen as the sap irritates the wrist and forearm. The pickers often hold the flowers until a bunch of 10 has been collected. The 10 flowers are held together by a rubber band and stacked along the arm, the chin, and the axilla, causing the rash to extend to those areas. Sap also can be transferred by the hand to other parts of the body, such as the face. In men, sap can be transferred to the genitalia as the men urinate in the field.

Narcissus also can cause poisoning if ingested by humans or animals. Researchers who analyzed calls made to the New Zealand Natural Poisons Centre between 2003 and 2010 determined that daffodil was the 11th most common call for plant-related poisoning.³

Although the severity of plant poisoning often is low due to the small amount of plant material usually consumed, more severe poisoning can occur when the plant is eaten for medicinal purposes or mistaken for an edible plant.³ Vomiting, respiratory symptoms, abdominal pain, diarrhea, trembling, and convulsions can occur when daffodils are ingested. Death has been reported due to ingestion of the bulbs.⁴

In February 2010, 10 children aged 10 and 11 years and their 22-year-old guide presented to an emergency department in Israel after ingesting Narcissus bulbs, which were mistakenly believed to be the bulbs of onions.⁴ Eight children and the guide vomited. One child and the guide reported abdominal pain. All were discharged in stable condition after 4 hours of observation.⁴

Clinical Manifestations

Daffodil rash or lily rash was first described in 1910.⁵ The typical rash presents as dryness, fissures, scaling, and erythema of the fingertips, hands, and forearms, often with subungual hyperkeratosis. Vesicles and pustules may be seen. The rash may extend to other areas of the body, including the face.⁶

Use of protective gloves and clothing to avoid contact with the plant is recommended.² Treatment includes stopping contact with the irritant, eye irrigation, and supportive measures (airway, breathing, and circulation). Activated charcoal can be helpful if used within 1 hour after ingestion but is contraindicated in vomiting patients.⁴

Identifying Features

The genus Narcissus is in the family Amaryllidaceae and contains ornamental plants, including daffodil (trumpet Narcissus, Narcissus pseudonarcissus), jonquil (Narcissus jonquilla), and poet’s narcissus (Narcissus poeticus). Most species are perennial; the plant emerges from a bulb in spring. Leaves originate from the base of the plant and range from 5-cm to 1.2-meters long, depending on the species. The flowers span a range of shapes and colors—from a trumpet (the daffodil) to a ringlike cup (poet’s Narcissus) and in yellow, white, and pink.⁷

Distribution and Plant Facts

Distribution—There are approximately 80 to 100 wild Narcissus species, which are found in southwestern Europe, North Africa, the Balkan Peninsula, Italy, and France. There are more than 27,000 Narcissus cultivars registered in the International Daffodil Register.⁸

Plant Facts—The daffodil is the national flower of Wales. It also is often used to depict hope and joy and is the symbol of cancer charities in many countries.⁹

The name Narcissus is believed to have originated from Greek mythology. A handsome youth, Narcissus, fell in love with his own reflection, for which the gods punished him by turning him into a flower.¹⁰

Another theory states that Narcissus is derived from the Greek word narkao (to benumb) due to its narcotic properties. When an open wound is subjected to an extract of the bulb, numbness of the entire nervous system is said to occur as well as paralysis of the heart. This narcotic effect led Socrates to refer to the Narcissus plant as the “chaplet of the infernal gods.”¹¹

Narcissus is an important flower in various ethnic rituals. The Greeks often planted daffodils near tombs. In Muslim culture, white is believed to be the symbol of good and purity; Narcissus was one of the most common white-flowered plants found in Muslim graveyards.¹²

Medicinal Qualities and Uses—Narcissus species have been used as medicinal plants for a variety of ailments. For example, Narcissus tazetta contains flavonoids, alkaloids, saponins, tannins, cardiac glycosides, oil, steroids, terpenoids, and anthraquinones that contribute to its antibacterial, antifungal, antiviral, antimalarial, anticancer, antioxidant, dermatologic, cardiovascular, immunomodulatory, and acetylcholinesterase inhibitory effects.¹³ In a study, chloroform extracts from N tazetta bulbs were found to be more active than doxorubicin against hepatocellular and colon cancer cell lines.¹⁴

More than 500 alkaloids have been isolated from the Narcissus genus.¹⁵ In 2001, the US Food and Drug Administration approved one of the alkaloids, galantamine, for the treatment of mild to moderate stages of Alzheimer disease.¹⁶ Galantamine selectively and reversibly inhibits acetylcholinesterase, the enzyme believed responsible for neurodegeneration seen in Alzheimer disease. Plants are the main source of galantamine, despite the ability of pharmaceutical companies to synthesize the compound. Galantamine hydrobromide is sold by prescription (Razadyne [Janssen Pharmaceuticals, Inc]); generic formulations approved by the US Food and Drug Administration have been produced by more than 15 pharmaceutical companies.^17,18

Irritant and Allergen

Sap found in the bulbs and hollow stems of Narcissus contains calcium oxalate crystals, or raphides. The minute, needle-shaped calcium oxalate crystals are believed to be a waste product of cellular metabolism.¹⁹ When the plant structure is compromised by pickers snapping the stalk, the sharp crystals penetrate the skin to cause an irritant contact dermatitis.

Relevant Research—A study used electron microscopy to characterize the structure of raphides from various plants,² though not from Narcissus species; the structure of each raphide was then compared to the degree of irritation it produced. The researchers concluded that more elongated crystals (those containing barbs) produce a greater degree of irritation. Narcissus species are known to cause varying degrees of skin irritation: For example, N tazetta rarely causes skin irritation, whereas N pseudonarcissi (daffodil) tends to cause remarkably more skin irritation.²

Allergic reactions to and strong toxicity from Narcissus species are not well understood. In a study, only 2 alkaloids—homolycorine and masonin—produced a weakly positive reaction in patch tests on sensitized guinea pigs, which correlates with the finding of a different study, in which only 2 of 12 patients whose findings were examined over 14 years had a positive patch test for Narcissus.^20,21

However, IgE-mediated allergies indicative of an allergic response to Narcissus have been reported. A study isolated an allergenic protein, narcin, from bulbs of N tazetta. Narcin is a 13-kDa protein with potent allergenic effects capable of inducing production of proinflammatory cytokines and increasing IgE levels in mononuclear cells in peripheral blood.²²

More research is required to find and understand the compounds responsible for causing an allergic reaction to Narcissus.

Nonmelanoma skin cancer (NMSC) is the most common cancer in the United States, and cutaneous melanoma is projected to be the fifth most common form of cancer in 2022, with increasing incidence and high potential for mortality.^1-3 Estimates indicate that 35% to 45% of all cancers in White patients are cutaneous, with 4% to 5% occurring in Hispanic patients, 2% to 4% in Asian patients, and 1% to 2% in Black patients.⁴ Of the keratinocyte carcinomas, basal cell carcinoma (BCC) is the most prevalent, projected to affect approximately 33% to 39% of White males and 23% to 28% of White females in the United States during their lifetimes. Squamous cell carcinoma (SCC) is the second most common skin malignancy, with a lifetime risk of 9% to 14% for White males and 4% to 9% for White females in the United States.⁵ The incidence of melanoma continues to increase, with approximately 99,780 new cases expected in the United States in 2022.¹

UV-induced DNA damage plays a key role in the pathogenesis and development of various skin malignancies.⁶ UV radiation from sunlight or tanning devices causes photocarcinogenesis due to molecular and cellular effects, including the generation of reactive oxygen species, DNA damage due to the formation of cyclobutane pyrimidine dimers and pyrimidine-pyrimidone, melanogenesis, apoptosis, and the increased expression of harmful genes and proteins.⁶ The summation of this damage can result in skin malignancies, including NMSC and melanoma.^6,7 Dietary antioxidants theoretically help prevent oxidative reactions from occurring within the body, and it has been suggested that intake of dietary antioxidants may decrease DNA damage and prevent tumorigenesis secondary to UV radiation.⁸ Antioxidants exist naturally in the body but can be acquired exogenously. Investigators have studied dietary antioxidants in preventing skin cancer formation with promising results in the laboratory setting.^8-11 Recently, more robust human studies have been initiated to further delineate this relationship. We present clinical evidence of several frequently utilized antioxidant vitamins and their effects on melanoma and NMSC.

Antioxidants

Vitamin A—Vitamin A is a fat-soluble vitamin found in animal sources, including fish, liver, and eggs. Carotenoids, such as beta carotene, are provitamin A plant derivatives found in fruits and vegetables that are converted into biologically active retinol and retinoic acid.¹² Retinols play a key role in cellular growth and differentiation and are thought to be protective against skin cancer via the inactivation of free radicals and immunologic enhancement due to their antiproliferative, antioxidative, and antiapoptotic effects.^13-16 Animal studies have demonstrated this protective effect and the ability of retinoids to suppress carcinogenesis; however, human studies reveal conflicting results.^17,18

Greenberg et al¹⁹ investigated the use of beta carotene in preventing the formation of NMSC. Patients (N=1805) were randomized to receive 50 mg of beta carotene daily or placebo. Over a 5-year period, there was no significant reduction in the occurrence of NMSC (relative risk [RR], 1.05; 95% CI, 0.91-1.22).¹⁹ Frieling et al²⁰ conducted a similar randomized, double-blind, placebo-controlled trial investigating beta carotene for primary prevention of NMSC in 22,071 healthy male physicians. The study group received 50 mg of beta carotene every other day for 12 years’ duration, and there was no significant effect on the incidence of first NMSC development (RR, 0.98; 95% CI, 0.92-1.05).²⁰

A case-control study by Naldi et al²¹ found an inverse association between vitamin A intake and development of melanoma. Study participants were stratified into quartiles based on level of dietary intake and found an odds ratio (OR) of 0.71 for beta carotene (95% CI, 0.50-1.02), 0.57 for retinol (95% CI, 0.39-0.83), and 0.51 for total vitamin A (95% CI, 0.35-0.75) when comparing the upper quartile of vitamin A intake to the lower quartile. Upper-quartile cutoff values of vitamin A intake were 214 µg/d for beta carotene, 149 µg/d for retinol, and 359 µg/d for total vitamin A.²¹ More recently, a meta-analysis by Zhang et al²² pooled data from 8 case-control studies and 2 prospective studies. Intake of retinol but not total vitamin A or beta carotene was associated with a reduced risk for development of melanoma (retinol: OR, 0.80; 95% CI, 0.69-0.92; total vitamin A: OR, 0.86; 95% CI, 0.59-1.25; beta carotene: OR, 0.87; 95% CI, 0.62-1.20).²² Feskanich et al²³ demonstrated similar findings with use of food-frequency questionnaires in White women, suggesting that retinol intake from food combined with supplements may be protective for women who were otherwise at a low risk for melanoma based on nondietary factors. These factors included painful or blistering sunburns during childhood, history of more than 6 sunburns, more than 3 moles on the left arm, having red or blonde hair, and having a parent or sibling with melanoma (P=.01). However, this relationship did not hold true when looking at women at an intermediate or high risk for melanoma (P=.16 and P=.46).²³

When looking at high-risk patients, such as transplant patients, oral retinoids have been beneficial in preventing NMSC.^24-27 Bavinck et al²⁴ investigated 44 renal transplant patients with a history of more than 10 NMSCs treated with 30 mg of acitretin daily vs placebo. Patients receiving oral retinoid supplementation developed fewer NMSCs over a 6-month treatment period (P=.01).²⁴ Similarly, George et al²⁵ investigated acitretin in renal transplant patients and found a statistically significant decrease in number of SCCs in patients on supplementation (P=.002). Solomon-Cohen et al²⁶ performed a retrospective case-crossover study in solid organ transplant recipients and found that those treated with 10 mg of acitretin daily for 2 years had a significant reduction in the number of new keratinocyte carcinomas (P=.002). Other investigators have demonstrated similar results, and in 2006, Otley et al²⁷ proposed standardized dosing of acitretin for chemoprevention in high-risk patients, including patients developing 5 to 10 NMSCs per year, solid organ transplant recipients, and those with syndromes associated with the development of NMSC.^28,29 Overall, in the general population, vitamin A and related compounds have not demonstrated a significant association with decreased development of NMSC; however, oral retinoids have proven useful for high-risk patients. Furthermore, several studies have suggested a negative association between vitamin A levels and the incidence of melanoma, specifically in the retinol formulation. 

Vitamin B₃—Nicotinamide (also known as niacinamide) is a water-soluble form of vitamin B₃ and is obtained from animal-based and plant-based foods, such as meat, fish, and legumes.³⁰ Nicotinamide plays a key role in cellular metabolism, cellular signaling, and DNA repair, including protection from UV damage within keratinocytes.^31,32 Early mouse models demonstrated decreased formation of skin tumors in mice treated with topical or oral nicotinamide.^32,33 A number of human studies have revealed similar results.^34-36

Chen et al³⁴ conducted the ONTRAC study, a phase 3, double-blind, randomized controlled trial (RCT) looking at 386 participants with a history of at least 2 NMSCs in the preceding 5 years. At 12 months, those treated with 500 mg of nicotinamide twice daily demonstrated a statistically significant decreased rate of SCC formation (P=.05). A decreased incidence of BCC development was noted; however, this trend did not reach statistical significance (P=.12). Precancerous skin lesions also were found to be decreased in the treatment group, with 20% lower incidence of actinic keratoses (AKs) after 9 months of treatment (P<.001).³⁴ Drago et al³⁵ specifically studied the incidence of AKs in 38 transplant recipients—8 liver and 30 kidney—and found that previously noted AKs had decreased in size for 18 of 19 patients taking 500 mg of nicotinamide daily when originally photographed AKs were remeasured at 6-month follow-up, with 7 of these 18 patients demonstrating complete clinical regression. Of those on nicotinamide supplementation, no new AKs developed compared to the control group, which demonstrated increased size of AKs or development of new AKs in 91% of patients, with 7 AKs progressing into SCC.³⁵

Nicotinamide has been demonstrated to be useful in preventing skin cancer in high-risk populations, such as transplant patients or those with a high incidence of NMSC.^34,36 Despite promising results within the laboratory setting, nicotinamide’s effects on melanoma in humans remains less clear.^31,37 Studies suggest that nicotinamide enhances tumor-infiltrating lymphocytes and DNA repair mechanisms in melanocytes, which may translate into nicotinamide, providing chemoprevention for melanoma, but research in human patients is limited.^31,37

Vitamin B₉—Folate, the natural form of vitamin B₉, is a water-soluble compound that is found in many foods, especially green leafy vegetables, and often is supplemented because of its health benefits.^38,39 In the skin, folic acid plays a key role in cellular replication and proliferation.³⁸ Controversy exists regarding folate’s effects on cellular growth and turnover with respect to cancer incidence.^38,40 Donnenfeld et al⁴¹ conducted a prospective study assessing dietary folic acid intake and development of NMSC. A total of 5880 participants completed dietary records throughout the first 2 years of the study. After an average follow-up period of 12.6 years, there was an overall increased incidence of skin cancer in those with increased dietary folate (P=.03). Furthermore, when striating by skin cancer type, there was an increased incidence of NMSC overall as well as BCC when analyzing by type of NMSC (P=.03 for NMSC; P=.05 for BCC). However, when stratifying by gender, these findings only held true for women.⁴¹ Similar effects were observed by Fung et al,⁴² who prospectively studied the intake of various vitamins in relationship to the development of BCC in women. During 12 years of follow-up, a positive association was observed between folate intake and BCC development (OR, 1.2; 95% CI, 1.10-1.31).⁴² Fung et al⁴³ also investigated the role of several vitamins in the development of SCC and found that folate showed a negative association, which did not reach statistical significance (RR, 0.79; 95% CI, 0.56-1.11). Furthermore, Vollset et al⁴⁰ conducted a meta-analysis comparing folic acid to placebo in the incidence of various types of cancer. The study excluded NMSC but reported no significant association between the development of melanoma and folic acid supplementation.⁴⁰ In summary, the effects of folate have diverse consequences, potentially promoting the formation of NMSC, but studies suggest that an individual’s gender and other genetic and environmental factors also may play a role.

Vitamin C—Vitamin C (also known as ascorbic acid) is a water-soluble vitamin with antioxidant immune-mediating effects. It is found in various fruits and vegetables and serves as a cofactor for enzymes within the body playing a key role in immune function and collagen formation.^44,45 It has been postulated that ascorbic acid can provide protection from UV radiation damage via its intracellular activity but conversely can contribute to oxidative damage.⁴⁴ Multiple in vitro laboratory studies and animal models have demonstrated photoprotective effects of ascorbic acid.^46-48 Despite these findings, minimal photoprotective effects have been found in the human population.

Kune et al⁴⁹ performed a case-control study of 88 males with previously diagnosed NMSC undergoing surgical removal and investigated patients’ prior dietary habits. Patients with NMSC had a statistically significantly lower level of vitamin C–containing food in their diet than those without NMSC (P=.004).⁴⁹ In addition, Vural et al⁵⁰ analyzed plasma samples and blood cells of patients with AK and BCC and found a significant decrease in ascorbic acid levels in both the AK (P<.001) and BCC (P<.001) groups compared with controls. However, studies have found that consumption of certain dietary compounds can rapidly increase plasma concentration levels, which may serve as a major confounding variable in this study. Plasma concentrations of ascorbic acid and beta carotene were found to be significantly increased following consumption of a high-antioxidant diet for as short a duration as 2 weeks (P<.05).⁵¹ More recently, Heinen et al⁵² performed a prospective study on 1001 adults. In patients without a history of skin cancer, they found that vitamin C from food sources plus dietary supplements was positively associated with the development of BCC (P=.03).⁵² Similarly, Fung et al⁴² performed a study in women and found a positive association between vitamin C intake and the development of BCC (OR, 1.13; 95% CI, 1.03-1.23).

The relationship between vitamin C intake—either in dietary or supplemental form—and melanoma remains controversial. Mice-based studies found that high concentrations of orally administered vitamin C induce cytotoxicity in melanoma cell lines, but at low concentrations they promote tumor growth of malignant melanoma.⁵³ Feskanich et al²³ examined the relationship between vitamin C intake and melanoma development via food frequency questionnaires in White women and found that vitamin C was associated with a higher risk for melanoma (P=.05), and furthermore, a positive dose response with frequency of orange juice intake was observed (P=.008). Overall, despite promising laboratory studies, there is a lack of RCTs investigating the use of vitamin C supplementation for prevention of NMSC and melanoma in humans, and the oral benefits of vitamin C for chemoprevention remain unclear.

Vitamin D—Vitamin D is a fat-soluble vitamin that is found in fish, liver, egg, and cheese, and is endogenously produced when UV radiation from sun exposure interacts with the skin, triggering the synthesis of vitamin D.⁵⁴ Vitamin D is biologically inactive and must be converted to its active form 1,25-dihydroxyvitamin D after entering the body. Vitamin D modulates many genes involved in cellular proliferation and differentiation.⁵⁴ Vitamin D receptors are expressed on keratinocytes and melanocytes.⁵⁵ Animal studies have demonstrated a potentially protective effect of vitamin D in the development of NMSC.⁵⁶ In a mouse model, Ellison et al⁵⁶ found that mice without vitamin D receptors developed skin tumors more rapidly than those with vitamin D receptors.

Unfortunately, these findings have not been demonstrated in humans, and studies have even reported an increased risk for development of NMSC in patients with normal or increased vitamin D levels compared with those with low levels of vitamin D.^57-60 Eide et al⁵⁷ studied 3223 patients seeking advice for low bone density by recording their vitamin D levels at the time of presentation and monitoring development of NMSC. Vitamin D levels greater than 15 ng/mL were positively associated with the development of NMSC (OR, 1.7; 95% CI, 1.04-2.7). This association held true for both SCC and BCC, with a higher risk estimated for SCC (OR, 3.2; 95% CI, 0.4-24.0 for SCC; OR, 1.7; 95% CI, 0.5-5.8 for BCC).⁵⁷ An increased vitamin D serum level also was found to be significantly associated with a higher risk for BCC and melanoma by van der Pols et al.⁵⁸ This prospective study looked at the incidence of skin cancer over 11 years. Study participants with vitamin D levels over 75 nmol/L more frequently developed BCC (P=.01) and melanoma (P=.05). In contrast, SCC was less frequently observed in participants with these high levels of vitamin D (P=.07).⁵⁸ Furthermore, Park et al⁶⁰ looked at vitamin D and skin cancer risk for men and women in the United States and found no association with risk for SCC or melanoma but a positive association with BCC (P=.05 for total vitamin D; P<.01 for dietary vitamin D). Additional studies have been performed with inconsistent results, and multiple authors suggest the possible confounding relationship between vitamin D levels and UV radiation exposure.^59-62 Furthermore, some studies have even demonstrated a negative association between vitamin D and NMSC. Tang et al⁶³ performed a retrospective case-control study in elderly males, investigating serum levels of vitamin D and patients’ self-reported history of NMSC, which demonstrated that higher levels of vitamin D were associated with a decreased risk for NMSC. Overall, the relationship between vitamin D and skin cancer development remains unclear for both melanoma and NMSC.

Vitamin E—Vitamin E is a fat-soluble vitamin that is found in plant-based oils, nuts, seeds, fruits, and vegetables.⁶⁴ It works as an antioxidant to protect against free radicals and heighten immune function, and it also serves as a pro-oxidant.^65,66 Vitamin E naturally exists in 8 chemical forms, of which gamma-tocopherol is the most frequently obtained form in the diet, and alpha-tocopherol is the most abundant form found in the body.^64,65

Early animal studies demonstrated the inhibition of UV-induced damage in mice receiving vitamin E supplementation.^67,68 Human studies have not consistently shown these effects. Vural et al⁵⁰ investigated plasma samples and blood cells of patients with AKs and BCCs and reported a significant decrease in alpha-tocopherol levels in both the AK (P<.05) and BCC (P<.001) groups compared with controls. However, studies also have demonstrated a positive association between vitamin E intake and the development of BCC, including one by Fung et al,⁴² which found a significant association in women (OR, 1.15; 95% CI, 1.06-1.26).

Vitamin E has been found to inhibit melanin synthesis in the laboratory, suggesting a potentially protective effect in melanoma.^69,70 However, in the study performed by Feskanich et al²³ examining vitamin intake and melanoma incidence via food-frequency questionnaires, vitamin E was not associated with a lower risk for melanoma. Despite promising laboratory studies, the data surrounding the use of a vitamin E supplement for prevention of melanoma and NMSC in humans remains unclear.

Selenium—Selenium is a trace mineral found in plants, meat, and fish. It plays a key role in reproduction, hormone metabolism, DNA synthesis, and protection from oxidative damage.⁷¹ In mice studies, lack of selenium-containing proteins resulted in skin abnormalities, including the development of a hyperplastic epidermis and aberrant hair follicle morphogenesis with alopecia after birth, and numerous experimental studies have demonstrated a negative association between selenium intake and cancer.^72,73 However, human studies have yielded alternative results. 

The Nutritional Prevention of Cancer Study Group analyzed 1312 dermatology patients with a history of NMSC.⁷⁴ The study population was obtained from 7 dermatology clinics with randomization to control for confounding variables. Study participants received either 200 μg of selenium daily or placebo.⁷⁴ Baseline characteristics of each study group were overall balanced. Selenium intake was found to have no effect on the development of BCC (hazard ratio [HR], 1.09; 95% CI, 0.94-1.26) but an increased risk for developing SCC (HR, 1.25; 95% CI, 1.03-1.51) and total NMSC (HR, 1.17; 95% CI, 1.02-1.34).^74,75 Similarly, Reid et al⁷⁶ performed an RCT comparing patients treated with 400 μg/d of selenium to those treated with 200 μg/d of selenium. When compared with placebo, those treated with 200 μg/d of selenium had a statistically significantly increased incidence of NMSC (P=.006); however, those treated with 400 μg/d of selenium had no significant change in total incidence of NMSC (P=.51).⁷⁶ Furthermore, Vinceti et al⁷⁷ performed a review of 83 studies from the literature investigating the effect of dietary selenium, and from the RCTs, there was no beneficial effect of selenium in reducing cancer risk in general; however, some studies demonstrated an increased incidence of other types of cancer, including melanoma. Of the RCTs included in the study investigating NMSC incidence specifically, it was found that the incidence was not affected by selenium administration (RR, 1.16; 95% CI, 0.30-4.42; 2 studies, 2027 participants).⁷⁷ Despite data from several studies demonstrating an increased risk for NMSC, the effects of selenium on the risk for NMSC and melanoma remain unclear. 

Combination Antioxidant Studies

In addition to investigating the use of single antioxidants in skin cancer prevention, studies utilizing the combination of various antioxidants or other dietary minerals have been conducted. Hercberg et al⁷⁸ performed a randomized, double-blinded, placebo-controlled trial of 13,017 adults (7876 women and 5141 men) receiving a combination of 120 mg vitamin C, 30 mg vitamin E, 100 μg selenium, 6 mg beta carotene, and 20 mg zinc. Study participants were followed for an average of 7.5 years, and the development of skin cancers were recorded. Overall, the incidence rate of skin cancer did not differ between the 2 treatment groups; however, when segregated by gender, the study found that there was an increased risk for developing skin cancer in women taking the antioxidant supplement combination compared with placebo (P=.03). This difference was not observed in the 2 treatment groups of male patients (P=.11). When looking specifically at NMSC, there was no difference between treatment groups for male or female patients (P=.39 for males; P=.15 for females). In contrast, there was a higher incidence of melanoma identified in female patients taking the combination antioxidant supplement (P=.01), but this was not seen within the male study population (P=.51).⁷⁸ In addition, Chang et al⁷⁹ performed a meta-analysis of 10 previously published RCTs. Analysis revealed that treatment with a variety of supplements, including vitamins A, C, E, and beta carotene, were found to have no preventative effects on the incidence of skin cancer development (RR, 0.98; CI, 0.98-1.03). Notable limitations to this study included the variability in protocols of the studies included in this meta-analysis, the limited number of RCTs investigating vitamin supplementation and the risk for skin cancer development, and the influence of dietary intake on study outcomes.⁷⁹

Other Dietary Agents

Furocoumarins—Furocoumarins are botanical substances found in various fruits and plants, including many citrus products. Furocoumarins are activated by UV light radiation and can lead to development of a phototoxic eruption. Several studies have suggested a pharmacogenetic effect of furocoumarins.⁸⁰ Sun et al⁸⁰ collected dietary data from 47,453 men and 75,291 women on furocoumarin intake and correlation with the development of NMSC. Overall, the study suggested that the intake of furocoumarins may lead to an increase in the development of BCC (HR, 1.16; 95% CI, 1.11-1.21; P=.002); however, there was no significant association identified between total intake of furocoumarins in the risk for SCC or melanoma.⁸⁰ Furthermore, Sakaki et al⁸¹ conducted a survey study looking at the consumption of citrus products and the development of NMSC. The group found that there was an increased risk for NMSC in those consuming an increased amount of citrus products (P=.007).⁸¹

Conclusion

Dietary antioxidants have been investigated for their potential role in the prevention of tumorigenesis. Specific antioxidant vitamins, such as vitamin A derivatives and niacinamide, have demonstrated clinical utility in the prevention of NMSC in high-risk populations. Retinol also has been associated with a reduced incidence of melanoma. Numerous antioxidants have demonstrated promising data within the laboratory setting; however, inconsistent results have been appreciated in humans. Furthermore, several research studies suggest that folate, vitamin D, and furocoumarins may be associated with an increased risk for skin cancer development; however, these studies are inconclusive, and dietary studies are challenging to conduct. Overall, RCTs investigating the role of antioxidants for chemoprevention are limited. Moreover, the study of dietary antioxidants and vitamins may be affected by various confounding variables that can be difficult to account for because of patients’ potentially poor recall of dietary intake and the effect of dietary intake in supplemental studies. Given the increasing prevalence of skin cancer worldwide, further research into the clinical utility of antioxidants in skin cancer prevention is warranted. 

Nonmelanoma skin cancer (NMSC) is the most common cancer in the United States, and cutaneous melanoma is projected to be the fifth most common form of cancer in 2022, with increasing incidence and high potential for mortality.^1-3 Estimates indicate that 35% to 45% of all cancers in White patients are cutaneous, with 4% to 5% occurring in Hispanic patients, 2% to 4% in Asian patients, and 1% to 2% in Black patients.⁴ Of the keratinocyte carcinomas, basal cell carcinoma (BCC) is the most prevalent, projected to affect approximately 33% to 39% of White males and 23% to 28% of White females in the United States during their lifetimes. Squamous cell carcinoma (SCC) is the second most common skin malignancy, with a lifetime risk of 9% to 14% for White males and 4% to 9% for White females in the United States.⁵ The incidence of melanoma continues to increase, with approximately 99,780 new cases expected in the United States in 2022.¹

UV-induced DNA damage plays a key role in the pathogenesis and development of various skin malignancies.⁶ UV radiation from sunlight or tanning devices causes photocarcinogenesis due to molecular and cellular effects, including the generation of reactive oxygen species, DNA damage due to the formation of cyclobutane pyrimidine dimers and pyrimidine-pyrimidone, melanogenesis, apoptosis, and the increased expression of harmful genes and proteins.⁶ The summation of this damage can result in skin malignancies, including NMSC and melanoma.^6,7 Dietary antioxidants theoretically help prevent oxidative reactions from occurring within the body, and it has been suggested that intake of dietary antioxidants may decrease DNA damage and prevent tumorigenesis secondary to UV radiation.⁸ Antioxidants exist naturally in the body but can be acquired exogenously. Investigators have studied dietary antioxidants in preventing skin cancer formation with promising results in the laboratory setting.^8-11 Recently, more robust human studies have been initiated to further delineate this relationship. We present clinical evidence of several frequently utilized antioxidant vitamins and their effects on melanoma and NMSC.

Antioxidants

Vitamin A—Vitamin A is a fat-soluble vitamin found in animal sources, including fish, liver, and eggs. Carotenoids, such as beta carotene, are provitamin A plant derivatives found in fruits and vegetables that are converted into biologically active retinol and retinoic acid.¹² Retinols play a key role in cellular growth and differentiation and are thought to be protective against skin cancer via the inactivation of free radicals and immunologic enhancement due to their antiproliferative, antioxidative, and antiapoptotic effects.^13-16 Animal studies have demonstrated this protective effect and the ability of retinoids to suppress carcinogenesis; however, human studies reveal conflicting results.^17,18

Greenberg et al¹⁹ investigated the use of beta carotene in preventing the formation of NMSC. Patients (N=1805) were randomized to receive 50 mg of beta carotene daily or placebo. Over a 5-year period, there was no significant reduction in the occurrence of NMSC (relative risk [RR], 1.05; 95% CI, 0.91-1.22).¹⁹ Frieling et al²⁰ conducted a similar randomized, double-blind, placebo-controlled trial investigating beta carotene for primary prevention of NMSC in 22,071 healthy male physicians. The study group received 50 mg of beta carotene every other day for 12 years’ duration, and there was no significant effect on the incidence of first NMSC development (RR, 0.98; 95% CI, 0.92-1.05).²⁰

A case-control study by Naldi et al²¹ found an inverse association between vitamin A intake and development of melanoma. Study participants were stratified into quartiles based on level of dietary intake and found an odds ratio (OR) of 0.71 for beta carotene (95% CI, 0.50-1.02), 0.57 for retinol (95% CI, 0.39-0.83), and 0.51 for total vitamin A (95% CI, 0.35-0.75) when comparing the upper quartile of vitamin A intake to the lower quartile. Upper-quartile cutoff values of vitamin A intake were 214 µg/d for beta carotene, 149 µg/d for retinol, and 359 µg/d for total vitamin A.²¹ More recently, a meta-analysis by Zhang et al²² pooled data from 8 case-control studies and 2 prospective studies. Intake of retinol but not total vitamin A or beta carotene was associated with a reduced risk for development of melanoma (retinol: OR, 0.80; 95% CI, 0.69-0.92; total vitamin A: OR, 0.86; 95% CI, 0.59-1.25; beta carotene: OR, 0.87; 95% CI, 0.62-1.20).²² Feskanich et al²³ demonstrated similar findings with use of food-frequency questionnaires in White women, suggesting that retinol intake from food combined with supplements may be protective for women who were otherwise at a low risk for melanoma based on nondietary factors. These factors included painful or blistering sunburns during childhood, history of more than 6 sunburns, more than 3 moles on the left arm, having red or blonde hair, and having a parent or sibling with melanoma (P=.01). However, this relationship did not hold true when looking at women at an intermediate or high risk for melanoma (P=.16 and P=.46).²³

When looking at high-risk patients, such as transplant patients, oral retinoids have been beneficial in preventing NMSC.^24-27 Bavinck et al²⁴ investigated 44 renal transplant patients with a history of more than 10 NMSCs treated with 30 mg of acitretin daily vs placebo. Patients receiving oral retinoid supplementation developed fewer NMSCs over a 6-month treatment period (P=.01).²⁴ Similarly, George et al²⁵ investigated acitretin in renal transplant patients and found a statistically significant decrease in number of SCCs in patients on supplementation (P=.002). Solomon-Cohen et al²⁶ performed a retrospective case-crossover study in solid organ transplant recipients and found that those treated with 10 mg of acitretin daily for 2 years had a significant reduction in the number of new keratinocyte carcinomas (P=.002). Other investigators have demonstrated similar results, and in 2006, Otley et al²⁷ proposed standardized dosing of acitretin for chemoprevention in high-risk patients, including patients developing 5 to 10 NMSCs per year, solid organ transplant recipients, and those with syndromes associated with the development of NMSC.^28,29 Overall, in the general population, vitamin A and related compounds have not demonstrated a significant association with decreased development of NMSC; however, oral retinoids have proven useful for high-risk patients. Furthermore, several studies have suggested a negative association between vitamin A levels and the incidence of melanoma, specifically in the retinol formulation. 

Vitamin B₃—Nicotinamide (also known as niacinamide) is a water-soluble form of vitamin B₃ and is obtained from animal-based and plant-based foods, such as meat, fish, and legumes.³⁰ Nicotinamide plays a key role in cellular metabolism, cellular signaling, and DNA repair, including protection from UV damage within keratinocytes.^31,32 Early mouse models demonstrated decreased formation of skin tumors in mice treated with topical or oral nicotinamide.^32,33 A number of human studies have revealed similar results.^34-36

Chen et al³⁴ conducted the ONTRAC study, a phase 3, double-blind, randomized controlled trial (RCT) looking at 386 participants with a history of at least 2 NMSCs in the preceding 5 years. At 12 months, those treated with 500 mg of nicotinamide twice daily demonstrated a statistically significant decreased rate of SCC formation (P=.05). A decreased incidence of BCC development was noted; however, this trend did not reach statistical significance (P=.12). Precancerous skin lesions also were found to be decreased in the treatment group, with 20% lower incidence of actinic keratoses (AKs) after 9 months of treatment (P<.001).³⁴ Drago et al³⁵ specifically studied the incidence of AKs in 38 transplant recipients—8 liver and 30 kidney—and found that previously noted AKs had decreased in size for 18 of 19 patients taking 500 mg of nicotinamide daily when originally photographed AKs were remeasured at 6-month follow-up, with 7 of these 18 patients demonstrating complete clinical regression. Of those on nicotinamide supplementation, no new AKs developed compared to the control group, which demonstrated increased size of AKs or development of new AKs in 91% of patients, with 7 AKs progressing into SCC.³⁵

Nicotinamide has been demonstrated to be useful in preventing skin cancer in high-risk populations, such as transplant patients or those with a high incidence of NMSC.^34,36 Despite promising results within the laboratory setting, nicotinamide’s effects on melanoma in humans remains less clear.^31,37 Studies suggest that nicotinamide enhances tumor-infiltrating lymphocytes and DNA repair mechanisms in melanocytes, which may translate into nicotinamide, providing chemoprevention for melanoma, but research in human patients is limited.^31,37

Vitamin B₉—Folate, the natural form of vitamin B₉, is a water-soluble compound that is found in many foods, especially green leafy vegetables, and often is supplemented because of its health benefits.^38,39 In the skin, folic acid plays a key role in cellular replication and proliferation.³⁸ Controversy exists regarding folate’s effects on cellular growth and turnover with respect to cancer incidence.^38,40 Donnenfeld et al⁴¹ conducted a prospective study assessing dietary folic acid intake and development of NMSC. A total of 5880 participants completed dietary records throughout the first 2 years of the study. After an average follow-up period of 12.6 years, there was an overall increased incidence of skin cancer in those with increased dietary folate (P=.03). Furthermore, when striating by skin cancer type, there was an increased incidence of NMSC overall as well as BCC when analyzing by type of NMSC (P=.03 for NMSC; P=.05 for BCC). However, when stratifying by gender, these findings only held true for women.⁴¹ Similar effects were observed by Fung et al,⁴² who prospectively studied the intake of various vitamins in relationship to the development of BCC in women. During 12 years of follow-up, a positive association was observed between folate intake and BCC development (OR, 1.2; 95% CI, 1.10-1.31).⁴² Fung et al⁴³ also investigated the role of several vitamins in the development of SCC and found that folate showed a negative association, which did not reach statistical significance (RR, 0.79; 95% CI, 0.56-1.11). Furthermore, Vollset et al⁴⁰ conducted a meta-analysis comparing folic acid to placebo in the incidence of various types of cancer. The study excluded NMSC but reported no significant association between the development of melanoma and folic acid supplementation.⁴⁰ In summary, the effects of folate have diverse consequences, potentially promoting the formation of NMSC, but studies suggest that an individual’s gender and other genetic and environmental factors also may play a role.

Vitamin C—Vitamin C (also known as ascorbic acid) is a water-soluble vitamin with antioxidant immune-mediating effects. It is found in various fruits and vegetables and serves as a cofactor for enzymes within the body playing a key role in immune function and collagen formation.^44,45 It has been postulated that ascorbic acid can provide protection from UV radiation damage via its intracellular activity but conversely can contribute to oxidative damage.⁴⁴ Multiple in vitro laboratory studies and animal models have demonstrated photoprotective effects of ascorbic acid.^46-48 Despite these findings, minimal photoprotective effects have been found in the human population.

Kune et al⁴⁹ performed a case-control study of 88 males with previously diagnosed NMSC undergoing surgical removal and investigated patients’ prior dietary habits. Patients with NMSC had a statistically significantly lower level of vitamin C–containing food in their diet than those without NMSC (P=.004).⁴⁹ In addition, Vural et al⁵⁰ analyzed plasma samples and blood cells of patients with AK and BCC and found a significant decrease in ascorbic acid levels in both the AK (P<.001) and BCC (P<.001) groups compared with controls. However, studies have found that consumption of certain dietary compounds can rapidly increase plasma concentration levels, which may serve as a major confounding variable in this study. Plasma concentrations of ascorbic acid and beta carotene were found to be significantly increased following consumption of a high-antioxidant diet for as short a duration as 2 weeks (P<.05).⁵¹ More recently, Heinen et al⁵² performed a prospective study on 1001 adults. In patients without a history of skin cancer, they found that vitamin C from food sources plus dietary supplements was positively associated with the development of BCC (P=.03).⁵² Similarly, Fung et al⁴² performed a study in women and found a positive association between vitamin C intake and the development of BCC (OR, 1.13; 95% CI, 1.03-1.23).

The relationship between vitamin C intake—either in dietary or supplemental form—and melanoma remains controversial. Mice-based studies found that high concentrations of orally administered vitamin C induce cytotoxicity in melanoma cell lines, but at low concentrations they promote tumor growth of malignant melanoma.⁵³ Feskanich et al²³ examined the relationship between vitamin C intake and melanoma development via food frequency questionnaires in White women and found that vitamin C was associated with a higher risk for melanoma (P=.05), and furthermore, a positive dose response with frequency of orange juice intake was observed (P=.008). Overall, despite promising laboratory studies, there is a lack of RCTs investigating the use of vitamin C supplementation for prevention of NMSC and melanoma in humans, and the oral benefits of vitamin C for chemoprevention remain unclear.

Vitamin D—Vitamin D is a fat-soluble vitamin that is found in fish, liver, egg, and cheese, and is endogenously produced when UV radiation from sun exposure interacts with the skin, triggering the synthesis of vitamin D.⁵⁴ Vitamin D is biologically inactive and must be converted to its active form 1,25-dihydroxyvitamin D after entering the body. Vitamin D modulates many genes involved in cellular proliferation and differentiation.⁵⁴ Vitamin D receptors are expressed on keratinocytes and melanocytes.⁵⁵ Animal studies have demonstrated a potentially protective effect of vitamin D in the development of NMSC.⁵⁶ In a mouse model, Ellison et al⁵⁶ found that mice without vitamin D receptors developed skin tumors more rapidly than those with vitamin D receptors.

Unfortunately, these findings have not been demonstrated in humans, and studies have even reported an increased risk for development of NMSC in patients with normal or increased vitamin D levels compared with those with low levels of vitamin D.^57-60 Eide et al⁵⁷ studied 3223 patients seeking advice for low bone density by recording their vitamin D levels at the time of presentation and monitoring development of NMSC. Vitamin D levels greater than 15 ng/mL were positively associated with the development of NMSC (OR, 1.7; 95% CI, 1.04-2.7). This association held true for both SCC and BCC, with a higher risk estimated for SCC (OR, 3.2; 95% CI, 0.4-24.0 for SCC; OR, 1.7; 95% CI, 0.5-5.8 for BCC).⁵⁷ An increased vitamin D serum level also was found to be significantly associated with a higher risk for BCC and melanoma by van der Pols et al.⁵⁸ This prospective study looked at the incidence of skin cancer over 11 years. Study participants with vitamin D levels over 75 nmol/L more frequently developed BCC (P=.01) and melanoma (P=.05). In contrast, SCC was less frequently observed in participants with these high levels of vitamin D (P=.07).⁵⁸ Furthermore, Park et al⁶⁰ looked at vitamin D and skin cancer risk for men and women in the United States and found no association with risk for SCC or melanoma but a positive association with BCC (P=.05 for total vitamin D; P<.01 for dietary vitamin D). Additional studies have been performed with inconsistent results, and multiple authors suggest the possible confounding relationship between vitamin D levels and UV radiation exposure.^59-62 Furthermore, some studies have even demonstrated a negative association between vitamin D and NMSC. Tang et al⁶³ performed a retrospective case-control study in elderly males, investigating serum levels of vitamin D and patients’ self-reported history of NMSC, which demonstrated that higher levels of vitamin D were associated with a decreased risk for NMSC. Overall, the relationship between vitamin D and skin cancer development remains unclear for both melanoma and NMSC.

Vitamin E—Vitamin E is a fat-soluble vitamin that is found in plant-based oils, nuts, seeds, fruits, and vegetables.⁶⁴ It works as an antioxidant to protect against free radicals and heighten immune function, and it also serves as a pro-oxidant.^65,66 Vitamin E naturally exists in 8 chemical forms, of which gamma-tocopherol is the most frequently obtained form in the diet, and alpha-tocopherol is the most abundant form found in the body.^64,65

Early animal studies demonstrated the inhibition of UV-induced damage in mice receiving vitamin E supplementation.^67,68 Human studies have not consistently shown these effects. Vural et al⁵⁰ investigated plasma samples and blood cells of patients with AKs and BCCs and reported a significant decrease in alpha-tocopherol levels in both the AK (P<.05) and BCC (P<.001) groups compared with controls. However, studies also have demonstrated a positive association between vitamin E intake and the development of BCC, including one by Fung et al,⁴² which found a significant association in women (OR, 1.15; 95% CI, 1.06-1.26).

Vitamin E has been found to inhibit melanin synthesis in the laboratory, suggesting a potentially protective effect in melanoma.^69,70 However, in the study performed by Feskanich et al²³ examining vitamin intake and melanoma incidence via food-frequency questionnaires, vitamin E was not associated with a lower risk for melanoma. Despite promising laboratory studies, the data surrounding the use of a vitamin E supplement for prevention of melanoma and NMSC in humans remains unclear.

Selenium—Selenium is a trace mineral found in plants, meat, and fish. It plays a key role in reproduction, hormone metabolism, DNA synthesis, and protection from oxidative damage.⁷¹ In mice studies, lack of selenium-containing proteins resulted in skin abnormalities, including the development of a hyperplastic epidermis and aberrant hair follicle morphogenesis with alopecia after birth, and numerous experimental studies have demonstrated a negative association between selenium intake and cancer.^72,73 However, human studies have yielded alternative results. 

The Nutritional Prevention of Cancer Study Group analyzed 1312 dermatology patients with a history of NMSC.⁷⁴ The study population was obtained from 7 dermatology clinics with randomization to control for confounding variables. Study participants received either 200 μg of selenium daily or placebo.⁷⁴ Baseline characteristics of each study group were overall balanced. Selenium intake was found to have no effect on the development of BCC (hazard ratio [HR], 1.09; 95% CI, 0.94-1.26) but an increased risk for developing SCC (HR, 1.25; 95% CI, 1.03-1.51) and total NMSC (HR, 1.17; 95% CI, 1.02-1.34).^74,75 Similarly, Reid et al⁷⁶ performed an RCT comparing patients treated with 400 μg/d of selenium to those treated with 200 μg/d of selenium. When compared with placebo, those treated with 200 μg/d of selenium had a statistically significantly increased incidence of NMSC (P=.006); however, those treated with 400 μg/d of selenium had no significant change in total incidence of NMSC (P=.51).⁷⁶ Furthermore, Vinceti et al⁷⁷ performed a review of 83 studies from the literature investigating the effect of dietary selenium, and from the RCTs, there was no beneficial effect of selenium in reducing cancer risk in general; however, some studies demonstrated an increased incidence of other types of cancer, including melanoma. Of the RCTs included in the study investigating NMSC incidence specifically, it was found that the incidence was not affected by selenium administration (RR, 1.16; 95% CI, 0.30-4.42; 2 studies, 2027 participants).⁷⁷ Despite data from several studies demonstrating an increased risk for NMSC, the effects of selenium on the risk for NMSC and melanoma remain unclear. 

Combination Antioxidant Studies

In addition to investigating the use of single antioxidants in skin cancer prevention, studies utilizing the combination of various antioxidants or other dietary minerals have been conducted. Hercberg et al⁷⁸ performed a randomized, double-blinded, placebo-controlled trial of 13,017 adults (7876 women and 5141 men) receiving a combination of 120 mg vitamin C, 30 mg vitamin E, 100 μg selenium, 6 mg beta carotene, and 20 mg zinc. Study participants were followed for an average of 7.5 years, and the development of skin cancers were recorded. Overall, the incidence rate of skin cancer did not differ between the 2 treatment groups; however, when segregated by gender, the study found that there was an increased risk for developing skin cancer in women taking the antioxidant supplement combination compared with placebo (P=.03). This difference was not observed in the 2 treatment groups of male patients (P=.11). When looking specifically at NMSC, there was no difference between treatment groups for male or female patients (P=.39 for males; P=.15 for females). In contrast, there was a higher incidence of melanoma identified in female patients taking the combination antioxidant supplement (P=.01), but this was not seen within the male study population (P=.51).⁷⁸ In addition, Chang et al⁷⁹ performed a meta-analysis of 10 previously published RCTs. Analysis revealed that treatment with a variety of supplements, including vitamins A, C, E, and beta carotene, were found to have no preventative effects on the incidence of skin cancer development (RR, 0.98; CI, 0.98-1.03). Notable limitations to this study included the variability in protocols of the studies included in this meta-analysis, the limited number of RCTs investigating vitamin supplementation and the risk for skin cancer development, and the influence of dietary intake on study outcomes.⁷⁹

Other Dietary Agents

Furocoumarins—Furocoumarins are botanical substances found in various fruits and plants, including many citrus products. Furocoumarins are activated by UV light radiation and can lead to development of a phototoxic eruption. Several studies have suggested a pharmacogenetic effect of furocoumarins.⁸⁰ Sun et al⁸⁰ collected dietary data from 47,453 men and 75,291 women on furocoumarin intake and correlation with the development of NMSC. Overall, the study suggested that the intake of furocoumarins may lead to an increase in the development of BCC (HR, 1.16; 95% CI, 1.11-1.21; P=.002); however, there was no significant association identified between total intake of furocoumarins in the risk for SCC or melanoma.⁸⁰ Furthermore, Sakaki et al⁸¹ conducted a survey study looking at the consumption of citrus products and the development of NMSC. The group found that there was an increased risk for NMSC in those consuming an increased amount of citrus products (P=.007).⁸¹

Conclusion

Dietary antioxidants have been investigated for their potential role in the prevention of tumorigenesis. Specific antioxidant vitamins, such as vitamin A derivatives and niacinamide, have demonstrated clinical utility in the prevention of NMSC in high-risk populations. Retinol also has been associated with a reduced incidence of melanoma. Numerous antioxidants have demonstrated promising data within the laboratory setting; however, inconsistent results have been appreciated in humans. Furthermore, several research studies suggest that folate, vitamin D, and furocoumarins may be associated with an increased risk for skin cancer development; however, these studies are inconclusive, and dietary studies are challenging to conduct. Overall, RCTs investigating the role of antioxidants for chemoprevention are limited. Moreover, the study of dietary antioxidants and vitamins may be affected by various confounding variables that can be difficult to account for because of patients’ potentially poor recall of dietary intake and the effect of dietary intake in supplemental studies. Given the increasing prevalence of skin cancer worldwide, further research into the clinical utility of antioxidants in skin cancer prevention is warranted. 

Nonmelanoma skin cancer (NMSC) is the most common cancer in the United States, and cutaneous melanoma is projected to be the fifth most common form of cancer in 2022, with increasing incidence and high potential for mortality.^1-3 Estimates indicate that 35% to 45% of all cancers in White patients are cutaneous, with 4% to 5% occurring in Hispanic patients, 2% to 4% in Asian patients, and 1% to 2% in Black patients.⁴ Of the keratinocyte carcinomas, basal cell carcinoma (BCC) is the most prevalent, projected to affect approximately 33% to 39% of White males and 23% to 28% of White females in the United States during their lifetimes. Squamous cell carcinoma (SCC) is the second most common skin malignancy, with a lifetime risk of 9% to 14% for White males and 4% to 9% for White females in the United States.⁵ The incidence of melanoma continues to increase, with approximately 99,780 new cases expected in the United States in 2022.¹

UV-induced DNA damage plays a key role in the pathogenesis and development of various skin malignancies.⁶ UV radiation from sunlight or tanning devices causes photocarcinogenesis due to molecular and cellular effects, including the generation of reactive oxygen species, DNA damage due to the formation of cyclobutane pyrimidine dimers and pyrimidine-pyrimidone, melanogenesis, apoptosis, and the increased expression of harmful genes and proteins.⁶ The summation of this damage can result in skin malignancies, including NMSC and melanoma.^6,7 Dietary antioxidants theoretically help prevent oxidative reactions from occurring within the body, and it has been suggested that intake of dietary antioxidants may decrease DNA damage and prevent tumorigenesis secondary to UV radiation.⁸ Antioxidants exist naturally in the body but can be acquired exogenously. Investigators have studied dietary antioxidants in preventing skin cancer formation with promising results in the laboratory setting.^8-11 Recently, more robust human studies have been initiated to further delineate this relationship. We present clinical evidence of several frequently utilized antioxidant vitamins and their effects on melanoma and NMSC.

Antioxidants

Vitamin A—Vitamin A is a fat-soluble vitamin found in animal sources, including fish, liver, and eggs. Carotenoids, such as beta carotene, are provitamin A plant derivatives found in fruits and vegetables that are converted into biologically active retinol and retinoic acid.¹² Retinols play a key role in cellular growth and differentiation and are thought to be protective against skin cancer via the inactivation of free radicals and immunologic enhancement due to their antiproliferative, antioxidative, and antiapoptotic effects.^13-16 Animal studies have demonstrated this protective effect and the ability of retinoids to suppress carcinogenesis; however, human studies reveal conflicting results.^17,18

Greenberg et al¹⁹ investigated the use of beta carotene in preventing the formation of NMSC. Patients (N=1805) were randomized to receive 50 mg of beta carotene daily or placebo. Over a 5-year period, there was no significant reduction in the occurrence of NMSC (relative risk [RR], 1.05; 95% CI, 0.91-1.22).¹⁹ Frieling et al²⁰ conducted a similar randomized, double-blind, placebo-controlled trial investigating beta carotene for primary prevention of NMSC in 22,071 healthy male physicians. The study group received 50 mg of beta carotene every other day for 12 years’ duration, and there was no significant effect on the incidence of first NMSC development (RR, 0.98; 95% CI, 0.92-1.05).²⁰

A case-control study by Naldi et al²¹ found an inverse association between vitamin A intake and development of melanoma. Study participants were stratified into quartiles based on level of dietary intake and found an odds ratio (OR) of 0.71 for beta carotene (95% CI, 0.50-1.02), 0.57 for retinol (95% CI, 0.39-0.83), and 0.51 for total vitamin A (95% CI, 0.35-0.75) when comparing the upper quartile of vitamin A intake to the lower quartile. Upper-quartile cutoff values of vitamin A intake were 214 µg/d for beta carotene, 149 µg/d for retinol, and 359 µg/d for total vitamin A.²¹ More recently, a meta-analysis by Zhang et al²² pooled data from 8 case-control studies and 2 prospective studies. Intake of retinol but not total vitamin A or beta carotene was associated with a reduced risk for development of melanoma (retinol: OR, 0.80; 95% CI, 0.69-0.92; total vitamin A: OR, 0.86; 95% CI, 0.59-1.25; beta carotene: OR, 0.87; 95% CI, 0.62-1.20).²² Feskanich et al²³ demonstrated similar findings with use of food-frequency questionnaires in White women, suggesting that retinol intake from food combined with supplements may be protective for women who were otherwise at a low risk for melanoma based on nondietary factors. These factors included painful or blistering sunburns during childhood, history of more than 6 sunburns, more than 3 moles on the left arm, having red or blonde hair, and having a parent or sibling with melanoma (P=.01). However, this relationship did not hold true when looking at women at an intermediate or high risk for melanoma (P=.16 and P=.46).²³

When looking at high-risk patients, such as transplant patients, oral retinoids have been beneficial in preventing NMSC.^24-27 Bavinck et al²⁴ investigated 44 renal transplant patients with a history of more than 10 NMSCs treated with 30 mg of acitretin daily vs placebo. Patients receiving oral retinoid supplementation developed fewer NMSCs over a 6-month treatment period (P=.01).²⁴ Similarly, George et al²⁵ investigated acitretin in renal transplant patients and found a statistically significant decrease in number of SCCs in patients on supplementation (P=.002). Solomon-Cohen et al²⁶ performed a retrospective case-crossover study in solid organ transplant recipients and found that those treated with 10 mg of acitretin daily for 2 years had a significant reduction in the number of new keratinocyte carcinomas (P=.002). Other investigators have demonstrated similar results, and in 2006, Otley et al²⁷ proposed standardized dosing of acitretin for chemoprevention in high-risk patients, including patients developing 5 to 10 NMSCs per year, solid organ transplant recipients, and those with syndromes associated with the development of NMSC.^28,29 Overall, in the general population, vitamin A and related compounds have not demonstrated a significant association with decreased development of NMSC; however, oral retinoids have proven useful for high-risk patients. Furthermore, several studies have suggested a negative association between vitamin A levels and the incidence of melanoma, specifically in the retinol formulation. 

Vitamin B₃—Nicotinamide (also known as niacinamide) is a water-soluble form of vitamin B₃ and is obtained from animal-based and plant-based foods, such as meat, fish, and legumes.³⁰ Nicotinamide plays a key role in cellular metabolism, cellular signaling, and DNA repair, including protection from UV damage within keratinocytes.^31,32 Early mouse models demonstrated decreased formation of skin tumors in mice treated with topical or oral nicotinamide.^32,33 A number of human studies have revealed similar results.^34-36

Chen et al³⁴ conducted the ONTRAC study, a phase 3, double-blind, randomized controlled trial (RCT) looking at 386 participants with a history of at least 2 NMSCs in the preceding 5 years. At 12 months, those treated with 500 mg of nicotinamide twice daily demonstrated a statistically significant decreased rate of SCC formation (P=.05). A decreased incidence of BCC development was noted; however, this trend did not reach statistical significance (P=.12). Precancerous skin lesions also were found to be decreased in the treatment group, with 20% lower incidence of actinic keratoses (AKs) after 9 months of treatment (P<.001).³⁴ Drago et al³⁵ specifically studied the incidence of AKs in 38 transplant recipients—8 liver and 30 kidney—and found that previously noted AKs had decreased in size for 18 of 19 patients taking 500 mg of nicotinamide daily when originally photographed AKs were remeasured at 6-month follow-up, with 7 of these 18 patients demonstrating complete clinical regression. Of those on nicotinamide supplementation, no new AKs developed compared to the control group, which demonstrated increased size of AKs or development of new AKs in 91% of patients, with 7 AKs progressing into SCC.³⁵

Nicotinamide has been demonstrated to be useful in preventing skin cancer in high-risk populations, such as transplant patients or those with a high incidence of NMSC.^34,36 Despite promising results within the laboratory setting, nicotinamide’s effects on melanoma in humans remains less clear.^31,37 Studies suggest that nicotinamide enhances tumor-infiltrating lymphocytes and DNA repair mechanisms in melanocytes, which may translate into nicotinamide, providing chemoprevention for melanoma, but research in human patients is limited.^31,37

Vitamin B₉—Folate, the natural form of vitamin B₉, is a water-soluble compound that is found in many foods, especially green leafy vegetables, and often is supplemented because of its health benefits.^38,39 In the skin, folic acid plays a key role in cellular replication and proliferation.³⁸ Controversy exists regarding folate’s effects on cellular growth and turnover with respect to cancer incidence.^38,40 Donnenfeld et al⁴¹ conducted a prospective study assessing dietary folic acid intake and development of NMSC. A total of 5880 participants completed dietary records throughout the first 2 years of the study. After an average follow-up period of 12.6 years, there was an overall increased incidence of skin cancer in those with increased dietary folate (P=.03). Furthermore, when striating by skin cancer type, there was an increased incidence of NMSC overall as well as BCC when analyzing by type of NMSC (P=.03 for NMSC; P=.05 for BCC). However, when stratifying by gender, these findings only held true for women.⁴¹ Similar effects were observed by Fung et al,⁴² who prospectively studied the intake of various vitamins in relationship to the development of BCC in women. During 12 years of follow-up, a positive association was observed between folate intake and BCC development (OR, 1.2; 95% CI, 1.10-1.31).⁴² Fung et al⁴³ also investigated the role of several vitamins in the development of SCC and found that folate showed a negative association, which did not reach statistical significance (RR, 0.79; 95% CI, 0.56-1.11). Furthermore, Vollset et al⁴⁰ conducted a meta-analysis comparing folic acid to placebo in the incidence of various types of cancer. The study excluded NMSC but reported no significant association between the development of melanoma and folic acid supplementation.⁴⁰ In summary, the effects of folate have diverse consequences, potentially promoting the formation of NMSC, but studies suggest that an individual’s gender and other genetic and environmental factors also may play a role.

Vitamin C—Vitamin C (also known as ascorbic acid) is a water-soluble vitamin with antioxidant immune-mediating effects. It is found in various fruits and vegetables and serves as a cofactor for enzymes within the body playing a key role in immune function and collagen formation.^44,45 It has been postulated that ascorbic acid can provide protection from UV radiation damage via its intracellular activity but conversely can contribute to oxidative damage.⁴⁴ Multiple in vitro laboratory studies and animal models have demonstrated photoprotective effects of ascorbic acid.^46-48 Despite these findings, minimal photoprotective effects have been found in the human population.

Kune et al⁴⁹ performed a case-control study of 88 males with previously diagnosed NMSC undergoing surgical removal and investigated patients’ prior dietary habits. Patients with NMSC had a statistically significantly lower level of vitamin C–containing food in their diet than those without NMSC (P=.004).⁴⁹ In addition, Vural et al⁵⁰ analyzed plasma samples and blood cells of patients with AK and BCC and found a significant decrease in ascorbic acid levels in both the AK (P<.001) and BCC (P<.001) groups compared with controls. However, studies have found that consumption of certain dietary compounds can rapidly increase plasma concentration levels, which may serve as a major confounding variable in this study. Plasma concentrations of ascorbic acid and beta carotene were found to be significantly increased following consumption of a high-antioxidant diet for as short a duration as 2 weeks (P<.05).⁵¹ More recently, Heinen et al⁵² performed a prospective study on 1001 adults. In patients without a history of skin cancer, they found that vitamin C from food sources plus dietary supplements was positively associated with the development of BCC (P=.03).⁵² Similarly, Fung et al⁴² performed a study in women and found a positive association between vitamin C intake and the development of BCC (OR, 1.13; 95% CI, 1.03-1.23).

The relationship between vitamin C intake—either in dietary or supplemental form—and melanoma remains controversial. Mice-based studies found that high concentrations of orally administered vitamin C induce cytotoxicity in melanoma cell lines, but at low concentrations they promote tumor growth of malignant melanoma.⁵³ Feskanich et al²³ examined the relationship between vitamin C intake and melanoma development via food frequency questionnaires in White women and found that vitamin C was associated with a higher risk for melanoma (P=.05), and furthermore, a positive dose response with frequency of orange juice intake was observed (P=.008). Overall, despite promising laboratory studies, there is a lack of RCTs investigating the use of vitamin C supplementation for prevention of NMSC and melanoma in humans, and the oral benefits of vitamin C for chemoprevention remain unclear.

Vitamin D—Vitamin D is a fat-soluble vitamin that is found in fish, liver, egg, and cheese, and is endogenously produced when UV radiation from sun exposure interacts with the skin, triggering the synthesis of vitamin D.⁵⁴ Vitamin D is biologically inactive and must be converted to its active form 1,25-dihydroxyvitamin D after entering the body. Vitamin D modulates many genes involved in cellular proliferation and differentiation.⁵⁴ Vitamin D receptors are expressed on keratinocytes and melanocytes.⁵⁵ Animal studies have demonstrated a potentially protective effect of vitamin D in the development of NMSC.⁵⁶ In a mouse model, Ellison et al⁵⁶ found that mice without vitamin D receptors developed skin tumors more rapidly than those with vitamin D receptors.

Unfortunately, these findings have not been demonstrated in humans, and studies have even reported an increased risk for development of NMSC in patients with normal or increased vitamin D levels compared with those with low levels of vitamin D.^57-60 Eide et al⁵⁷ studied 3223 patients seeking advice for low bone density by recording their vitamin D levels at the time of presentation and monitoring development of NMSC. Vitamin D levels greater than 15 ng/mL were positively associated with the development of NMSC (OR, 1.7; 95% CI, 1.04-2.7). This association held true for both SCC and BCC, with a higher risk estimated for SCC (OR, 3.2; 95% CI, 0.4-24.0 for SCC; OR, 1.7; 95% CI, 0.5-5.8 for BCC).⁵⁷ An increased vitamin D serum level also was found to be significantly associated with a higher risk for BCC and melanoma by van der Pols et al.⁵⁸ This prospective study looked at the incidence of skin cancer over 11 years. Study participants with vitamin D levels over 75 nmol/L more frequently developed BCC (P=.01) and melanoma (P=.05). In contrast, SCC was less frequently observed in participants with these high levels of vitamin D (P=.07).⁵⁸ Furthermore, Park et al⁶⁰ looked at vitamin D and skin cancer risk for men and women in the United States and found no association with risk for SCC or melanoma but a positive association with BCC (P=.05 for total vitamin D; P<.01 for dietary vitamin D). Additional studies have been performed with inconsistent results, and multiple authors suggest the possible confounding relationship between vitamin D levels and UV radiation exposure.^59-62 Furthermore, some studies have even demonstrated a negative association between vitamin D and NMSC. Tang et al⁶³ performed a retrospective case-control study in elderly males, investigating serum levels of vitamin D and patients’ self-reported history of NMSC, which demonstrated that higher levels of vitamin D were associated with a decreased risk for NMSC. Overall, the relationship between vitamin D and skin cancer development remains unclear for both melanoma and NMSC.

Vitamin E—Vitamin E is a fat-soluble vitamin that is found in plant-based oils, nuts, seeds, fruits, and vegetables.⁶⁴ It works as an antioxidant to protect against free radicals and heighten immune function, and it also serves as a pro-oxidant.^65,66 Vitamin E naturally exists in 8 chemical forms, of which gamma-tocopherol is the most frequently obtained form in the diet, and alpha-tocopherol is the most abundant form found in the body.^64,65

Early animal studies demonstrated the inhibition of UV-induced damage in mice receiving vitamin E supplementation.^67,68 Human studies have not consistently shown these effects. Vural et al⁵⁰ investigated plasma samples and blood cells of patients with AKs and BCCs and reported a significant decrease in alpha-tocopherol levels in both the AK (P<.05) and BCC (P<.001) groups compared with controls. However, studies also have demonstrated a positive association between vitamin E intake and the development of BCC, including one by Fung et al,⁴² which found a significant association in women (OR, 1.15; 95% CI, 1.06-1.26).

Vitamin E has been found to inhibit melanin synthesis in the laboratory, suggesting a potentially protective effect in melanoma.^69,70 However, in the study performed by Feskanich et al²³ examining vitamin intake and melanoma incidence via food-frequency questionnaires, vitamin E was not associated with a lower risk for melanoma. Despite promising laboratory studies, the data surrounding the use of a vitamin E supplement for prevention of melanoma and NMSC in humans remains unclear.

Selenium—Selenium is a trace mineral found in plants, meat, and fish. It plays a key role in reproduction, hormone metabolism, DNA synthesis, and protection from oxidative damage.⁷¹ In mice studies, lack of selenium-containing proteins resulted in skin abnormalities, including the development of a hyperplastic epidermis and aberrant hair follicle morphogenesis with alopecia after birth, and numerous experimental studies have demonstrated a negative association between selenium intake and cancer.^72,73 However, human studies have yielded alternative results. 

The Nutritional Prevention of Cancer Study Group analyzed 1312 dermatology patients with a history of NMSC.⁷⁴ The study population was obtained from 7 dermatology clinics with randomization to control for confounding variables. Study participants received either 200 μg of selenium daily or placebo.⁷⁴ Baseline characteristics of each study group were overall balanced. Selenium intake was found to have no effect on the development of BCC (hazard ratio [HR], 1.09; 95% CI, 0.94-1.26) but an increased risk for developing SCC (HR, 1.25; 95% CI, 1.03-1.51) and total NMSC (HR, 1.17; 95% CI, 1.02-1.34).^74,75 Similarly, Reid et al⁷⁶ performed an RCT comparing patients treated with 400 μg/d of selenium to those treated with 200 μg/d of selenium. When compared with placebo, those treated with 200 μg/d of selenium had a statistically significantly increased incidence of NMSC (P=.006); however, those treated with 400 μg/d of selenium had no significant change in total incidence of NMSC (P=.51).⁷⁶ Furthermore, Vinceti et al⁷⁷ performed a review of 83 studies from the literature investigating the effect of dietary selenium, and from the RCTs, there was no beneficial effect of selenium in reducing cancer risk in general; however, some studies demonstrated an increased incidence of other types of cancer, including melanoma. Of the RCTs included in the study investigating NMSC incidence specifically, it was found that the incidence was not affected by selenium administration (RR, 1.16; 95% CI, 0.30-4.42; 2 studies, 2027 participants).⁷⁷ Despite data from several studies demonstrating an increased risk for NMSC, the effects of selenium on the risk for NMSC and melanoma remain unclear. 

Combination Antioxidant Studies

In addition to investigating the use of single antioxidants in skin cancer prevention, studies utilizing the combination of various antioxidants or other dietary minerals have been conducted. Hercberg et al⁷⁸ performed a randomized, double-blinded, placebo-controlled trial of 13,017 adults (7876 women and 5141 men) receiving a combination of 120 mg vitamin C, 30 mg vitamin E, 100 μg selenium, 6 mg beta carotene, and 20 mg zinc. Study participants were followed for an average of 7.5 years, and the development of skin cancers were recorded. Overall, the incidence rate of skin cancer did not differ between the 2 treatment groups; however, when segregated by gender, the study found that there was an increased risk for developing skin cancer in women taking the antioxidant supplement combination compared with placebo (P=.03). This difference was not observed in the 2 treatment groups of male patients (P=.11). When looking specifically at NMSC, there was no difference between treatment groups for male or female patients (P=.39 for males; P=.15 for females). In contrast, there was a higher incidence of melanoma identified in female patients taking the combination antioxidant supplement (P=.01), but this was not seen within the male study population (P=.51).⁷⁸ In addition, Chang et al⁷⁹ performed a meta-analysis of 10 previously published RCTs. Analysis revealed that treatment with a variety of supplements, including vitamins A, C, E, and beta carotene, were found to have no preventative effects on the incidence of skin cancer development (RR, 0.98; CI, 0.98-1.03). Notable limitations to this study included the variability in protocols of the studies included in this meta-analysis, the limited number of RCTs investigating vitamin supplementation and the risk for skin cancer development, and the influence of dietary intake on study outcomes.⁷⁹

Other Dietary Agents

Furocoumarins—Furocoumarins are botanical substances found in various fruits and plants, including many citrus products. Furocoumarins are activated by UV light radiation and can lead to development of a phototoxic eruption. Several studies have suggested a pharmacogenetic effect of furocoumarins.⁸⁰ Sun et al⁸⁰ collected dietary data from 47,453 men and 75,291 women on furocoumarin intake and correlation with the development of NMSC. Overall, the study suggested that the intake of furocoumarins may lead to an increase in the development of BCC (HR, 1.16; 95% CI, 1.11-1.21; P=.002); however, there was no significant association identified between total intake of furocoumarins in the risk for SCC or melanoma.⁸⁰ Furthermore, Sakaki et al⁸¹ conducted a survey study looking at the consumption of citrus products and the development of NMSC. The group found that there was an increased risk for NMSC in those consuming an increased amount of citrus products (P=.007).⁸¹

Conclusion

Dietary antioxidants have been investigated for their potential role in the prevention of tumorigenesis. Specific antioxidant vitamins, such as vitamin A derivatives and niacinamide, have demonstrated clinical utility in the prevention of NMSC in high-risk populations. Retinol also has been associated with a reduced incidence of melanoma. Numerous antioxidants have demonstrated promising data within the laboratory setting; however, inconsistent results have been appreciated in humans. Furthermore, several research studies suggest that folate, vitamin D, and furocoumarins may be associated with an increased risk for skin cancer development; however, these studies are inconclusive, and dietary studies are challenging to conduct. Overall, RCTs investigating the role of antioxidants for chemoprevention are limited. Moreover, the study of dietary antioxidants and vitamins may be affected by various confounding variables that can be difficult to account for because of patients’ potentially poor recall of dietary intake and the effect of dietary intake in supplemental studies. Given the increasing prevalence of skin cancer worldwide, further research into the clinical utility of antioxidants in skin cancer prevention is warranted. 

Epidermal growth factor receptor (EGFR) inhibitors cause numerous cutaneous adverse events (AEs), including papulopustular eruptions, paronychia, acral fissures, xerosis, alopecia, and trichomegaly.¹ Symmetrical drug-related intertriginous and flexural exanthema (SDRIFE) is an uncommon type IV hypersensitivity reaction reported most commonly in association with β-lactam antibiotics and other medications.² Treatment of SDRIFE generally involves withdrawing the inciting medication; however, in SDRIFE secondary to oncologic therapies, medication withdrawal may not be feasible or desirable. We present 2 cases of SDRIFE secondary to EGFR inhibitors in which treatment was continued alongside supportive skin-directed therapies. We also review the literature.

Case Reports

Patient 1—A 65-year-old man with stage IV non–small cell lung cancer presented to the dermatology clinic with an eruption of 2 months’ duration that began in the periumbilical area and spread to the perianal area within 2 weeks of starting treatment with lazertinib and amivantamab. Physical examination was notable for Common Terminology Criteria for Adverse Events (CTCAE) Grade 2 periumbilical erythema and erosions as well as symmetric red-brown patches with linear erosions in the gluteal cleft (Figure 1) and Grade 2 facial papulopustular rash. Herpes simplex virus polymerase chain reaction and bacterial culture were negative. A skin biopsy from the left buttock revealed dermal edema and a perivascular lymphocytic infiltrate compatible with SDRIFE. Triamcinolone ointment 0.1% twice daily was initiated, then uptitrated to betamethasone ointment 0.05% twice daily with moderate improvement. The patient had a treatment interruption due to malignancy complications, at which time his skin improved, with recurrence of the eruption after treatment re-initiation. He resumed skin-directed treatment and was maintained on betamethasone ointment 0.05% and tacrolimus ointment 0.1% twice daily on alternating days. This treatment was continued for 4 months before the patient died from complications of the malignancy.

Patient 2—A 68-year-old woman with stage IV lung adenocarcinoma presented to the dermatology clinic with a rash of 3 weeks’ duration. Treatment with osimertinib was initiated 8 months prior to presentation, and there were no recent medication changes. Physical examination revealed CTCAE Grade 2 erythematous patches in the inguinal folds (Figure 2A), inframammary folds (Figure 2B), and on the nasal tip, as well as Grade 2 paronychia. The patient was managed with hydrocortisone cream 1% twice daily, and osimertinib was continued. At follow-up 4 weeks later, the erythema had faded to hyperpigmentation in affected areas with resolution of symptoms. No further treatment was required.

Comment

Supportive oncodermatologists and dermatology hospitalists should be aware of SDRIFE as an uncommon but increasingly recognized cutaneous AE of EGFR inhibitors. Other cases of SDRIFE secondary to EGFR inhibition are described in the Table.^2-5 Although SDRIFE typically is treated by discontinuation of the offending agent, in all reported cases of EGFR inhibitor–associated SDRIFE the rash was CTCAE Grade 2, meaning that it did not interfere with instrumental activities of daily living. In 5 of 6 cases, EGFR therapy was continued while skin-directed therapies were used for symptom management.

Presentation of SDRIFE—Symmetrical drug-related intertriginous and flexural exanthema is characterized by a symmetric, sharply demarcated erythema in the inguinal, gluteal, or perianal area with at least 1 other flexural localization involved in the absence of systemic signs. It is observed most frequently at initial exposure or re-exposure to a medication. Onset typically is within a few hours to a few days after exposure to a medication.⁶ Interestingly, in this case series, half of reported SDRIFE cases developed 8 months or more after EGFR inhibitor initiation.

Pathophysiology of SDRIFE—The mechanism of SDRIFE has not been clearly elucidated; it generally is accepted to be a delayed-type hypersensitivity drug reaction, though other proposed pathophysiologic mechanisms for the distribution of SDRIFE include recall phenomenon or predisposing anatomic factors such as temperature, humidity, and apocrine or eccrine gland density.^6,7 Epidermal growth factor receptor plays a critical role in regulating differentiation and proliferation of epidermal keratinocytes, hair follicles, and the sweat gland apparatus. Additionally, it has been hypothesized that EGFR inhibitor use may affect the microflora of the skin and that EGFR inhibitors directly affect the immune system, as demonstrated in an experiment showing EGFR inhibitor–treated mice had enhanced skin inflammation and contact hypersensitivity responses.⁸ How these disparate mechanisms may interact to produce SDRIFE and the reason for the notably delayed presentation of SDRIFE in half of the cases we reviewed is not known. Other delayed cutaneous AEs of EGFR inhibitor therapy, such as paronychia, are thought to be secondary to development of skin fragility and decreased keratinocyte proliferation with secondary infection.¹ It is conceivable that a combination of proliferative, immunologic, and microbiome-related factors may each be playing a role in EGFR inhibitor–related SDRIFE.

Dermatology Inpatient Considerations—As seen in our cases, dermatologists can play a valuable role in diagnosing, grading, and managing cutaneous AEs associated with the administration of oncologic therapies. The array of cutaneous AEs has grown as cancer treatment options have expanded from conventional antimetabolite agents to kinase inhibitors and immune checkpoint inhibitors. Dermatologists may play an important role in differentiating the etiology of a skin finding (eg, infectious vs inflammatory) and can identify serious or dose-limiting reactions, such as Stevens-Johnson syndrome or drug reaction with eosinophilia and systemic symptoms (DRESS). If cutaneous AEs appear to occur secondary to administration of a chemotherapeutic agent, use of the National Cancer Institute CTCAE should be employed. For certain AEs (eg, alopecia, acneiform rashes, bullous dermatitis), specific grading has been developed based on a combination of body surface area involved, psychosocial impact, symptoms, and other associated morbidity.⁹

In management of chemotherapy-associated cutaneous AEs, dermatologists are likely to be the members of the health care team most comfortable with prescribing high-potency anti-inflammatory topical medications. Dermatologic consultation for management of cutaneous AEs has been shown to both reduce the need for systemic immunosuppression and limit interruptions in oncologic treatment.¹⁰

Conclusion

Epidermal growth factor receptor inhibitors commonly are prescribed for colorectal cancer, non–small cell lung cancer, and squamous cell carcinoma of the head and neck. They are associated with a variety of cutaneous AEs, including acneiform eruptions, paronychia, and xerosis, which rarely necessitate stopping EGFR inhibitor therapy. Our cases support an approach to managing EGFR inhibitor–related SDRIFE that does not involve discontinuation of the offending agent. Further studies are needed on the best supportive topical and systemic regimens for EGFR inhibitor–associated SDRIFE.

Epidermal growth factor receptor (EGFR) inhibitors cause numerous cutaneous adverse events (AEs), including papulopustular eruptions, paronychia, acral fissures, xerosis, alopecia, and trichomegaly.¹ Symmetrical drug-related intertriginous and flexural exanthema (SDRIFE) is an uncommon type IV hypersensitivity reaction reported most commonly in association with β-lactam antibiotics and other medications.² Treatment of SDRIFE generally involves withdrawing the inciting medication; however, in SDRIFE secondary to oncologic therapies, medication withdrawal may not be feasible or desirable. We present 2 cases of SDRIFE secondary to EGFR inhibitors in which treatment was continued alongside supportive skin-directed therapies. We also review the literature.

Case Reports

Patient 1—A 65-year-old man with stage IV non–small cell lung cancer presented to the dermatology clinic with an eruption of 2 months’ duration that began in the periumbilical area and spread to the perianal area within 2 weeks of starting treatment with lazertinib and amivantamab. Physical examination was notable for Common Terminology Criteria for Adverse Events (CTCAE) Grade 2 periumbilical erythema and erosions as well as symmetric red-brown patches with linear erosions in the gluteal cleft (Figure 1) and Grade 2 facial papulopustular rash. Herpes simplex virus polymerase chain reaction and bacterial culture were negative. A skin biopsy from the left buttock revealed dermal edema and a perivascular lymphocytic infiltrate compatible with SDRIFE. Triamcinolone ointment 0.1% twice daily was initiated, then uptitrated to betamethasone ointment 0.05% twice daily with moderate improvement. The patient had a treatment interruption due to malignancy complications, at which time his skin improved, with recurrence of the eruption after treatment re-initiation. He resumed skin-directed treatment and was maintained on betamethasone ointment 0.05% and tacrolimus ointment 0.1% twice daily on alternating days. This treatment was continued for 4 months before the patient died from complications of the malignancy.

Patient 2—A 68-year-old woman with stage IV lung adenocarcinoma presented to the dermatology clinic with a rash of 3 weeks’ duration. Treatment with osimertinib was initiated 8 months prior to presentation, and there were no recent medication changes. Physical examination revealed CTCAE Grade 2 erythematous patches in the inguinal folds (Figure 2A), inframammary folds (Figure 2B), and on the nasal tip, as well as Grade 2 paronychia. The patient was managed with hydrocortisone cream 1% twice daily, and osimertinib was continued. At follow-up 4 weeks later, the erythema had faded to hyperpigmentation in affected areas with resolution of symptoms. No further treatment was required.

Comment

Supportive oncodermatologists and dermatology hospitalists should be aware of SDRIFE as an uncommon but increasingly recognized cutaneous AE of EGFR inhibitors. Other cases of SDRIFE secondary to EGFR inhibition are described in the Table.^2-5 Although SDRIFE typically is treated by discontinuation of the offending agent, in all reported cases of EGFR inhibitor–associated SDRIFE the rash was CTCAE Grade 2, meaning that it did not interfere with instrumental activities of daily living. In 5 of 6 cases, EGFR therapy was continued while skin-directed therapies were used for symptom management.

Presentation of SDRIFE—Symmetrical drug-related intertriginous and flexural exanthema is characterized by a symmetric, sharply demarcated erythema in the inguinal, gluteal, or perianal area with at least 1 other flexural localization involved in the absence of systemic signs. It is observed most frequently at initial exposure or re-exposure to a medication. Onset typically is within a few hours to a few days after exposure to a medication.⁶ Interestingly, in this case series, half of reported SDRIFE cases developed 8 months or more after EGFR inhibitor initiation.

Pathophysiology of SDRIFE—The mechanism of SDRIFE has not been clearly elucidated; it generally is accepted to be a delayed-type hypersensitivity drug reaction, though other proposed pathophysiologic mechanisms for the distribution of SDRIFE include recall phenomenon or predisposing anatomic factors such as temperature, humidity, and apocrine or eccrine gland density.^6,7 Epidermal growth factor receptor plays a critical role in regulating differentiation and proliferation of epidermal keratinocytes, hair follicles, and the sweat gland apparatus. Additionally, it has been hypothesized that EGFR inhibitor use may affect the microflora of the skin and that EGFR inhibitors directly affect the immune system, as demonstrated in an experiment showing EGFR inhibitor–treated mice had enhanced skin inflammation and contact hypersensitivity responses.⁸ How these disparate mechanisms may interact to produce SDRIFE and the reason for the notably delayed presentation of SDRIFE in half of the cases we reviewed is not known. Other delayed cutaneous AEs of EGFR inhibitor therapy, such as paronychia, are thought to be secondary to development of skin fragility and decreased keratinocyte proliferation with secondary infection.¹ It is conceivable that a combination of proliferative, immunologic, and microbiome-related factors may each be playing a role in EGFR inhibitor–related SDRIFE.

Dermatology Inpatient Considerations—As seen in our cases, dermatologists can play a valuable role in diagnosing, grading, and managing cutaneous AEs associated with the administration of oncologic therapies. The array of cutaneous AEs has grown as cancer treatment options have expanded from conventional antimetabolite agents to kinase inhibitors and immune checkpoint inhibitors. Dermatologists may play an important role in differentiating the etiology of a skin finding (eg, infectious vs inflammatory) and can identify serious or dose-limiting reactions, such as Stevens-Johnson syndrome or drug reaction with eosinophilia and systemic symptoms (DRESS). If cutaneous AEs appear to occur secondary to administration of a chemotherapeutic agent, use of the National Cancer Institute CTCAE should be employed. For certain AEs (eg, alopecia, acneiform rashes, bullous dermatitis), specific grading has been developed based on a combination of body surface area involved, psychosocial impact, symptoms, and other associated morbidity.⁹

In management of chemotherapy-associated cutaneous AEs, dermatologists are likely to be the members of the health care team most comfortable with prescribing high-potency anti-inflammatory topical medications. Dermatologic consultation for management of cutaneous AEs has been shown to both reduce the need for systemic immunosuppression and limit interruptions in oncologic treatment.¹⁰

Conclusion

Epidermal growth factor receptor inhibitors commonly are prescribed for colorectal cancer, non–small cell lung cancer, and squamous cell carcinoma of the head and neck. They are associated with a variety of cutaneous AEs, including acneiform eruptions, paronychia, and xerosis, which rarely necessitate stopping EGFR inhibitor therapy. Our cases support an approach to managing EGFR inhibitor–related SDRIFE that does not involve discontinuation of the offending agent. Further studies are needed on the best supportive topical and systemic regimens for EGFR inhibitor–associated SDRIFE.

Epidermal growth factor receptor (EGFR) inhibitors cause numerous cutaneous adverse events (AEs), including papulopustular eruptions, paronychia, acral fissures, xerosis, alopecia, and trichomegaly.¹ Symmetrical drug-related intertriginous and flexural exanthema (SDRIFE) is an uncommon type IV hypersensitivity reaction reported most commonly in association with β-lactam antibiotics and other medications.² Treatment of SDRIFE generally involves withdrawing the inciting medication; however, in SDRIFE secondary to oncologic therapies, medication withdrawal may not be feasible or desirable. We present 2 cases of SDRIFE secondary to EGFR inhibitors in which treatment was continued alongside supportive skin-directed therapies. We also review the literature.

Case Reports

Patient 1—A 65-year-old man with stage IV non–small cell lung cancer presented to the dermatology clinic with an eruption of 2 months’ duration that began in the periumbilical area and spread to the perianal area within 2 weeks of starting treatment with lazertinib and amivantamab. Physical examination was notable for Common Terminology Criteria for Adverse Events (CTCAE) Grade 2 periumbilical erythema and erosions as well as symmetric red-brown patches with linear erosions in the gluteal cleft (Figure 1) and Grade 2 facial papulopustular rash. Herpes simplex virus polymerase chain reaction and bacterial culture were negative. A skin biopsy from the left buttock revealed dermal edema and a perivascular lymphocytic infiltrate compatible with SDRIFE. Triamcinolone ointment 0.1% twice daily was initiated, then uptitrated to betamethasone ointment 0.05% twice daily with moderate improvement. The patient had a treatment interruption due to malignancy complications, at which time his skin improved, with recurrence of the eruption after treatment re-initiation. He resumed skin-directed treatment and was maintained on betamethasone ointment 0.05% and tacrolimus ointment 0.1% twice daily on alternating days. This treatment was continued for 4 months before the patient died from complications of the malignancy.

Patient 2—A 68-year-old woman with stage IV lung adenocarcinoma presented to the dermatology clinic with a rash of 3 weeks’ duration. Treatment with osimertinib was initiated 8 months prior to presentation, and there were no recent medication changes. Physical examination revealed CTCAE Grade 2 erythematous patches in the inguinal folds (Figure 2A), inframammary folds (Figure 2B), and on the nasal tip, as well as Grade 2 paronychia. The patient was managed with hydrocortisone cream 1% twice daily, and osimertinib was continued. At follow-up 4 weeks later, the erythema had faded to hyperpigmentation in affected areas with resolution of symptoms. No further treatment was required.

Comment

Supportive oncodermatologists and dermatology hospitalists should be aware of SDRIFE as an uncommon but increasingly recognized cutaneous AE of EGFR inhibitors. Other cases of SDRIFE secondary to EGFR inhibition are described in the Table.^2-5 Although SDRIFE typically is treated by discontinuation of the offending agent, in all reported cases of EGFR inhibitor–associated SDRIFE the rash was CTCAE Grade 2, meaning that it did not interfere with instrumental activities of daily living. In 5 of 6 cases, EGFR therapy was continued while skin-directed therapies were used for symptom management.

Presentation of SDRIFE—Symmetrical drug-related intertriginous and flexural exanthema is characterized by a symmetric, sharply demarcated erythema in the inguinal, gluteal, or perianal area with at least 1 other flexural localization involved in the absence of systemic signs. It is observed most frequently at initial exposure or re-exposure to a medication. Onset typically is within a few hours to a few days after exposure to a medication.⁶ Interestingly, in this case series, half of reported SDRIFE cases developed 8 months or more after EGFR inhibitor initiation.

Pathophysiology of SDRIFE—The mechanism of SDRIFE has not been clearly elucidated; it generally is accepted to be a delayed-type hypersensitivity drug reaction, though other proposed pathophysiologic mechanisms for the distribution of SDRIFE include recall phenomenon or predisposing anatomic factors such as temperature, humidity, and apocrine or eccrine gland density.^6,7 Epidermal growth factor receptor plays a critical role in regulating differentiation and proliferation of epidermal keratinocytes, hair follicles, and the sweat gland apparatus. Additionally, it has been hypothesized that EGFR inhibitor use may affect the microflora of the skin and that EGFR inhibitors directly affect the immune system, as demonstrated in an experiment showing EGFR inhibitor–treated mice had enhanced skin inflammation and contact hypersensitivity responses.⁸ How these disparate mechanisms may interact to produce SDRIFE and the reason for the notably delayed presentation of SDRIFE in half of the cases we reviewed is not known. Other delayed cutaneous AEs of EGFR inhibitor therapy, such as paronychia, are thought to be secondary to development of skin fragility and decreased keratinocyte proliferation with secondary infection.¹ It is conceivable that a combination of proliferative, immunologic, and microbiome-related factors may each be playing a role in EGFR inhibitor–related SDRIFE.

Dermatology Inpatient Considerations—As seen in our cases, dermatologists can play a valuable role in diagnosing, grading, and managing cutaneous AEs associated with the administration of oncologic therapies. The array of cutaneous AEs has grown as cancer treatment options have expanded from conventional antimetabolite agents to kinase inhibitors and immune checkpoint inhibitors. Dermatologists may play an important role in differentiating the etiology of a skin finding (eg, infectious vs inflammatory) and can identify serious or dose-limiting reactions, such as Stevens-Johnson syndrome or drug reaction with eosinophilia and systemic symptoms (DRESS). If cutaneous AEs appear to occur secondary to administration of a chemotherapeutic agent, use of the National Cancer Institute CTCAE should be employed. For certain AEs (eg, alopecia, acneiform rashes, bullous dermatitis), specific grading has been developed based on a combination of body surface area involved, psychosocial impact, symptoms, and other associated morbidity.⁹

In management of chemotherapy-associated cutaneous AEs, dermatologists are likely to be the members of the health care team most comfortable with prescribing high-potency anti-inflammatory topical medications. Dermatologic consultation for management of cutaneous AEs has been shown to both reduce the need for systemic immunosuppression and limit interruptions in oncologic treatment.¹⁰

Conclusion

Epidermal growth factor receptor inhibitors commonly are prescribed for colorectal cancer, non–small cell lung cancer, and squamous cell carcinoma of the head and neck. They are associated with a variety of cutaneous AEs, including acneiform eruptions, paronychia, and xerosis, which rarely necessitate stopping EGFR inhibitor therapy. Our cases support an approach to managing EGFR inhibitor–related SDRIFE that does not involve discontinuation of the offending agent. Further studies are needed on the best supportive topical and systemic regimens for EGFR inhibitor–associated SDRIFE.

SAN DIEGO – If approved, a novel topical gel that combines an antibiotic, an antibacterial, and a retinoid would mark an important advance for many patients with moderate-to-severe acne, according to Lawrence F. Eichenfield, MD.

The product, known as IDP-126 and being developed by Ortho Dermatologics, is a fixed dose triple combination of clindamycin 1.2% plus benzoyl peroxide 3.1% and adapalene 0.15% being evaluated in patients nine years of age and older. According to a 2021 press release from the company, results from a second 12-week pivotal phase 3 trial showed a treatment success of 50.5% and 20.5% for IDP-126 and its vehicle, respectively, along with significant changes from baseline in inflammatory lesion count and non-inflammatory lesion count.

olavs/Thinkstock

More recently, researchers led by Linda Stein Gold, MD, conducted a 12-week multicenter, randomized, double-blind study of IDP-126 in 741 children, adolescents, and adults with moderate to severe acne. They reported 52.5% of patients treated with IDP-126 gel achieved treatment success by week 12, with over 70% reduction in inflammatory and noninflammatory lesions.

“This will be interesting to follow as it moves along,” Dr. Eichenfield, chief of pediatric and adolescent dermatology at Rady Children’s Hospital, San Diego, said at the annual Masters of Aesthetics Symposium in a presentation on the newest topical acne treatments.

“If approved, we probably will be able to decrease our need for systemic therapies in some individuals,” he said. “It’s something that may become important in practices that mix and match between medical and procedural or surgical approaches to acne.”

Dr. Eichenfield highlighted other products for the topical treatment of acne:

• Trifarotene cream 0.005% (Aklief). In 2019, Food and Drug Administration approval made trifarotene cream the first new retinoid indicated for acne in several decades. It is indicated for the topical treatment of acne vulgaris in patients age 9 and older and has been studied in acne of the face, chest, and back.
• Tazarotene lotion 0.045% (Arazlo). The 0.1% formulation of tazarotene is commonly used for acne, but it can cause skin irritation, dryness, and erythema. The new 0.045% formulation was developed in a three-dimensional mesh matrix, with ingredients from an oil-in-water emulsion. “Many of the new acne products come with a background of vehicle delivery systems that minimize the concentration gradient, so it decreases irritation,” said Dr. Eichenfield, one of the authors of a 2021 review article on the management of acne vulgaris in JAMA. “This has very good efficacy without the traditional irritation of other tazarotene products,” Dr. Eichenfield said.
• Minocycline 4% topical foam (Amzeeq). The 2019 U.S. approval marked the first and so far only topical minocycline prescription treatment for acne. “Its hydrophobic composition allows for stable and efficient delivery of inherently unstable pharmaceutical ingredients,” he said. “It’s generally well tolerated.”
• Clascoterone cream 1% (Winlevi). This first-in-class topical androgen receptor inhibitor is approved for the treatment of acne in patients 12 years and older. It competes with dihydrotestosterone and selectively targets androgen receptors in sebocytes and hair papilla cells. “It is safe for use in men, has been studied on the face and trunk, and has been shown to inhibit sebum production, reduce secretion of inflammatory cytokines, and inhibit inflammatory pathways,” Dr. Eichenfield said.
• Micro-encapsulated benzoyl peroxide 3% and tretinoin 0.1% cream (Twyneo). This is a once-daily fixed-dose combination of tretinoin and benzoyl peroxide indicated for the treatment of acne vulgaris in patients age 9 and older. According to a press release from Sol-Gel, the manufacturer, silica (silicon dioxide) core shell structures separate micro-encapsulate tretinoin crystals and benzoyl peroxide crystals, enabling inclusion of the two active ingredients in the cream.

Dr. Eichenfield disclosed that he has been an investigator and/or consultant for Almirall, Cassiopea, Dermata, Galderma, and Ortho Dermatologics.

SAN DIEGO – If approved, a novel topical gel that combines an antibiotic, an antibacterial, and a retinoid would mark an important advance for many patients with moderate-to-severe acne, according to Lawrence F. Eichenfield, MD.

The product, known as IDP-126 and being developed by Ortho Dermatologics, is a fixed dose triple combination of clindamycin 1.2% plus benzoyl peroxide 3.1% and adapalene 0.15% being evaluated in patients nine years of age and older. According to a 2021 press release from the company, results from a second 12-week pivotal phase 3 trial showed a treatment success of 50.5% and 20.5% for IDP-126 and its vehicle, respectively, along with significant changes from baseline in inflammatory lesion count and non-inflammatory lesion count.

olavs/Thinkstock

More recently, researchers led by Linda Stein Gold, MD, conducted a 12-week multicenter, randomized, double-blind study of IDP-126 in 741 children, adolescents, and adults with moderate to severe acne. They reported 52.5% of patients treated with IDP-126 gel achieved treatment success by week 12, with over 70% reduction in inflammatory and noninflammatory lesions.

“This will be interesting to follow as it moves along,” Dr. Eichenfield, chief of pediatric and adolescent dermatology at Rady Children’s Hospital, San Diego, said at the annual Masters of Aesthetics Symposium in a presentation on the newest topical acne treatments.

“If approved, we probably will be able to decrease our need for systemic therapies in some individuals,” he said. “It’s something that may become important in practices that mix and match between medical and procedural or surgical approaches to acne.”

Dr. Eichenfield highlighted other products for the topical treatment of acne:

• Trifarotene cream 0.005% (Aklief). In 2019, Food and Drug Administration approval made trifarotene cream the first new retinoid indicated for acne in several decades. It is indicated for the topical treatment of acne vulgaris in patients age 9 and older and has been studied in acne of the face, chest, and back.
• Tazarotene lotion 0.045% (Arazlo). The 0.1% formulation of tazarotene is commonly used for acne, but it can cause skin irritation, dryness, and erythema. The new 0.045% formulation was developed in a three-dimensional mesh matrix, with ingredients from an oil-in-water emulsion. “Many of the new acne products come with a background of vehicle delivery systems that minimize the concentration gradient, so it decreases irritation,” said Dr. Eichenfield, one of the authors of a 2021 review article on the management of acne vulgaris in JAMA. “This has very good efficacy without the traditional irritation of other tazarotene products,” Dr. Eichenfield said.
• Minocycline 4% topical foam (Amzeeq). The 2019 U.S. approval marked the first and so far only topical minocycline prescription treatment for acne. “Its hydrophobic composition allows for stable and efficient delivery of inherently unstable pharmaceutical ingredients,” he said. “It’s generally well tolerated.”
• Clascoterone cream 1% (Winlevi). This first-in-class topical androgen receptor inhibitor is approved for the treatment of acne in patients 12 years and older. It competes with dihydrotestosterone and selectively targets androgen receptors in sebocytes and hair papilla cells. “It is safe for use in men, has been studied on the face and trunk, and has been shown to inhibit sebum production, reduce secretion of inflammatory cytokines, and inhibit inflammatory pathways,” Dr. Eichenfield said.
• Micro-encapsulated benzoyl peroxide 3% and tretinoin 0.1% cream (Twyneo). This is a once-daily fixed-dose combination of tretinoin and benzoyl peroxide indicated for the treatment of acne vulgaris in patients age 9 and older. According to a press release from Sol-Gel, the manufacturer, silica (silicon dioxide) core shell structures separate micro-encapsulate tretinoin crystals and benzoyl peroxide crystals, enabling inclusion of the two active ingredients in the cream.

Dr. Eichenfield disclosed that he has been an investigator and/or consultant for Almirall, Cassiopea, Dermata, Galderma, and Ortho Dermatologics.

SAN DIEGO – If approved, a novel topical gel that combines an antibiotic, an antibacterial, and a retinoid would mark an important advance for many patients with moderate-to-severe acne, according to Lawrence F. Eichenfield, MD.

The product, known as IDP-126 and being developed by Ortho Dermatologics, is a fixed dose triple combination of clindamycin 1.2% plus benzoyl peroxide 3.1% and adapalene 0.15% being evaluated in patients nine years of age and older. According to a 2021 press release from the company, results from a second 12-week pivotal phase 3 trial showed a treatment success of 50.5% and 20.5% for IDP-126 and its vehicle, respectively, along with significant changes from baseline in inflammatory lesion count and non-inflammatory lesion count.

olavs/Thinkstock

More recently, researchers led by Linda Stein Gold, MD, conducted a 12-week multicenter, randomized, double-blind study of IDP-126 in 741 children, adolescents, and adults with moderate to severe acne. They reported 52.5% of patients treated with IDP-126 gel achieved treatment success by week 12, with over 70% reduction in inflammatory and noninflammatory lesions.

“This will be interesting to follow as it moves along,” Dr. Eichenfield, chief of pediatric and adolescent dermatology at Rady Children’s Hospital, San Diego, said at the annual Masters of Aesthetics Symposium in a presentation on the newest topical acne treatments.

“If approved, we probably will be able to decrease our need for systemic therapies in some individuals,” he said. “It’s something that may become important in practices that mix and match between medical and procedural or surgical approaches to acne.”

Dr. Eichenfield highlighted other products for the topical treatment of acne:

• Trifarotene cream 0.005% (Aklief). In 2019, Food and Drug Administration approval made trifarotene cream the first new retinoid indicated for acne in several decades. It is indicated for the topical treatment of acne vulgaris in patients age 9 and older and has been studied in acne of the face, chest, and back.
• Tazarotene lotion 0.045% (Arazlo). The 0.1% formulation of tazarotene is commonly used for acne, but it can cause skin irritation, dryness, and erythema. The new 0.045% formulation was developed in a three-dimensional mesh matrix, with ingredients from an oil-in-water emulsion. “Many of the new acne products come with a background of vehicle delivery systems that minimize the concentration gradient, so it decreases irritation,” said Dr. Eichenfield, one of the authors of a 2021 review article on the management of acne vulgaris in JAMA. “This has very good efficacy without the traditional irritation of other tazarotene products,” Dr. Eichenfield said.
• Minocycline 4% topical foam (Amzeeq). The 2019 U.S. approval marked the first and so far only topical minocycline prescription treatment for acne. “Its hydrophobic composition allows for stable and efficient delivery of inherently unstable pharmaceutical ingredients,” he said. “It’s generally well tolerated.”
• Clascoterone cream 1% (Winlevi). This first-in-class topical androgen receptor inhibitor is approved for the treatment of acne in patients 12 years and older. It competes with dihydrotestosterone and selectively targets androgen receptors in sebocytes and hair papilla cells. “It is safe for use in men, has been studied on the face and trunk, and has been shown to inhibit sebum production, reduce secretion of inflammatory cytokines, and inhibit inflammatory pathways,” Dr. Eichenfield said.
• Micro-encapsulated benzoyl peroxide 3% and tretinoin 0.1% cream (Twyneo). This is a once-daily fixed-dose combination of tretinoin and benzoyl peroxide indicated for the treatment of acne vulgaris in patients age 9 and older. According to a press release from Sol-Gel, the manufacturer, silica (silicon dioxide) core shell structures separate micro-encapsulate tretinoin crystals and benzoyl peroxide crystals, enabling inclusion of the two active ingredients in the cream.

Dr. Eichenfield disclosed that he has been an investigator and/or consultant for Almirall, Cassiopea, Dermata, Galderma, and Ortho Dermatologics.

With the introduction of the first US Food and Drug Administration (FDA)–approved medication for alopecia areata (AA)—the Janus kinase (JAK) inhibitor, baricitinib—there is an important focus on this disease in the literature and for practicing dermatologists. Known by all as an autoimmune genetic disease that causes relapsing and remitting nonscarring hair loss, AA is a condition where the psychological burden has been less widely recognized. Patients with AA have reported lower health-related quality of life scores compared to patients with other skin conditions, including psoriasis or atopic dermatitis. In addition, a lesser amount of scalp coverage is negatively correlated to health-related quality of life scores.¹ Patients with AA also have a 39% lifetime prevalence of major depressive disorder and generalized anxiety disorder.² The treatment of AA has been a hodgepodge of topical, intralesional, and systemic agents, all with indirect immunosuppressive or anagen prolongation effects. Now that there is an approved therapy for AA with more treatments likely to be approved in the near future, there must be a focus on real-world outcomes. With the dawn of a new era in the treatment of AA as well as new information showcasing an altered prevalence of AA in skin of color, highlighting disparities among this population may help ease challenges dermatologic providers will face.

Efficacy of Baricitinib in Different Races and Ethnicities

How will patients of different races and ethnicities respond to this new treatment, and how will their emotional health be affected? The 2 phase 3 pivotal trials showing efficacy of baricitinib in AA included Black and Latino patients but not in a way that is representative of the US population.³ Until recently, the most commonly used prevalence of AA in the United States was from the NHANES I study completed between 1971 and 1974, which was between 0.1% and 0.2%⁴ with minimal focus on race and ethnicity. Recent studies suggest that there may be increased prevalence of this condition in Black patients in the United States. These new findings raise concern around access to care and treatment and the need to tailor psychosocial interventions for populations that may not currently have these supports.

A large cross-sectional study published in 2020 demonstrated that these data remained similar, with a lifetime prevalence of 0.21%.⁵ Of the 45,016 participants—representative of the US population based on the 2015 US Census—the average age of AA patients was 41.2 years, with 61.3% being White and not of Hispanic origin.⁵ In recent years, other studies have challenged the narrative that AA predominantly affects White patients.^6-8 A different cross-sectional study utilizing National Alopecia Areata Registry data from 2002 to 2016 suggested that Black patients have greater odds of developing AA.⁶ In this study of 2645 cases of AA, the odds ratios of developing the condition were 1.36 for Blacks, 0.53 for Asians, and 0.83 for Hispanics compared with the referent White population. These results were consistent through the varying subtypes of AA.⁶ In a reply to these findings, Gonzalez and Fleischer⁷ analyzed data from the 2007 to 2016 National Ambulatory Medical Care Survey database with a focus on racial and ethnic prevalence of AA. This study concluded that Latino and non-White individuals had an increased likelihood of clinician visits for AA compared with White individuals.⁷

More evidence of the Black predominance of AA was demonstrated in a study published in 2018. In this large-scale study, 63,960 women from the Nurses’ Health Study (NHS) and 88,368 women from the Nurses’ Health Study II (NHSII) were included to examine prevalence of disease among these US women.⁸ Analysis showed increased odds of AA based on self-reported race in Black and Hispanic women. Lifetime incidence of AA was greater in Black women, with 2.63 and 5.23 in NHS and NHSII, respectively. It was hypothesized that hairstyling practices in Black and Hispanic women may cause AA to be more noticeable,⁸ which may drive patients to seek medical evaluation.

Feaster and McMichael⁹ published information on the epidemiology of AA in a busy hair loss clinic. This retrospective single-institution study of 265 pediatric and adult Black patients with AA seen over a 5-year period showed that patients aged 18 to 34 years were most likely to present for care, which accounted for 35.8% of the study population, followed by patients aged 10 to 17 years, which accounted for 15.1%. This study also found that females were the larger segment of AA patients, with an increased distribution of disease in young patients. Most of these patients (68.2%) had patchy hair loss, and the ophiasis pattern was seen in 15.1%.⁹ Although the pathogenesis of AA is linked to autoimmunity,¹⁰ the leading cause for these epidemiologic findings of increased prevalence in Black patients is still uncertain.

Baricitinib for AA

In June 2022, the FDA announced the first biologic drug approved for the treatment of AA—baricitinib. Baricitinib is an oral, selective, reversible inhibitor of JAK1 and JAK2.³ The phase 3 trials for baricitinib—BRAVE-AA1 (N=654) and BRAVE-AA2 (N=546)—were conducted between March 2019 and May 2020. In these double-blind, parallel-group, randomized, placebo-controlled trials, 33% of the patient population receiving baricitinib accomplished 80% or more scalp coverage at 36 weeks. The Severity of Alopecia Tool (SALT) score also decreased to 20 or less in 36 weeks. The BRAVE-AA1 and BRAVE-AA2 trials consisted of a total of 1200 patients, with only 98 identifying as Black. Of these 98 patients, 33 were randomly selected to receive placebo.³ With studies now suggesting that Black individuals have greater odds of AA compared with White individuals⁶ and Black patients being more likely to seek medical care for AA,⁷ the BRAVE-AA1 and BRAVE-AA2 study population did not allow for significant comparative data for Black patients. These studies did not document Latino patient involvement.³ Future studies in AA must recruit a diversified group of study participants to better reflect the patients with an increased likelihood of presenting with AA.

Other Treatments on the Horizon

Baricitinib likely will remain alone in its class for only a short time. Phase 3 trials have been completed for ritlecitinib, brepocitinib, and deuruxolitinib for AA. Ritlecitinib, an irreversible inhibitor of JAK3 and the tyrosine kinase expressed in hepatocellular carcinoma (TEC) kinase family, has met all end points in a phase 2b/3 study.¹¹ Brepocitinib is an oral tyrosine kinase 2/JAK1 inhibitor,¹² and deuruxolitinib is an investigational JAK1/2 inhibitor for AA.¹³

Prior authorizations have been the initial step for many drugs in varying fields of medical practice. A study completed in 2016 suggested that insurance coverage for biologics used in the treatment of psoriasis was becoming increasingly difficult.¹⁴ Prior authorization requirement rates increased from 16% of patients in 2009 to 75% in 2014. The decision time also increased from 3.7 days in 2009 to 6.7 days in 2014. The most common reason for delay in decisions and denials was due to step therapy.¹⁴ Insurance companies wanted many patients to try less expensive treatment options prior to “stepping up” to more expensive treatments. Although this may be the case in the treatment of psoriasis, the role of step therapy is unclear for patients with AA because there is only 1 FDA-approved medication. This sets out an ambiguous future for our patients with AA and approval for baricitinib.

The time required for the correspondence between insurance companies, clinic staff, and patients for drug approval may delay treatments, and not all providers have enough staff to coordinate and perform this work. For Black patients, who may present more frequently and with more severe disease,⁷ this could lead to a health care disparity due to the likelihood of the increased need for biologic treatment. Because Black patients have an increased likelihood of being uninsured or underinsured,¹⁵ this further decreases the chances of the most severe AA patients receiving the most helpful medication for their condition.

Many pharmaceutical companies have drug cost assistance programs that aim to provide support covering expensive medications for patients unable to afford them. Although this is a good first step, treatment with any JAK inhibitor potentially can be lifelong. Regarding the social determinants of health, it is known that access to medications does not solely depend on cost. Transportation and access to qualified health professionals are among the issues that create barriers to health care. Instilling long-term practices to ensure equal access to JAK inhibitors and treatment of AA may be the cornerstone to treating AA with equity. Whether we require pharmaceutical companies to make sure all patients have equal access to medications or provide community resources to hairstylists and federally qualified health centers, raising awareness and advocating for and creating attainable access to treatment modalities is imperative to providing well-rounded care to a diverse population.

With the introduction of the first US Food and Drug Administration (FDA)–approved medication for alopecia areata (AA)—the Janus kinase (JAK) inhibitor, baricitinib—there is an important focus on this disease in the literature and for practicing dermatologists. Known by all as an autoimmune genetic disease that causes relapsing and remitting nonscarring hair loss, AA is a condition where the psychological burden has been less widely recognized. Patients with AA have reported lower health-related quality of life scores compared to patients with other skin conditions, including psoriasis or atopic dermatitis. In addition, a lesser amount of scalp coverage is negatively correlated to health-related quality of life scores.¹ Patients with AA also have a 39% lifetime prevalence of major depressive disorder and generalized anxiety disorder.² The treatment of AA has been a hodgepodge of topical, intralesional, and systemic agents, all with indirect immunosuppressive or anagen prolongation effects. Now that there is an approved therapy for AA with more treatments likely to be approved in the near future, there must be a focus on real-world outcomes. With the dawn of a new era in the treatment of AA as well as new information showcasing an altered prevalence of AA in skin of color, highlighting disparities among this population may help ease challenges dermatologic providers will face.

Efficacy of Baricitinib in Different Races and Ethnicities

How will patients of different races and ethnicities respond to this new treatment, and how will their emotional health be affected? The 2 phase 3 pivotal trials showing efficacy of baricitinib in AA included Black and Latino patients but not in a way that is representative of the US population.³ Until recently, the most commonly used prevalence of AA in the United States was from the NHANES I study completed between 1971 and 1974, which was between 0.1% and 0.2%⁴ with minimal focus on race and ethnicity. Recent studies suggest that there may be increased prevalence of this condition in Black patients in the United States. These new findings raise concern around access to care and treatment and the need to tailor psychosocial interventions for populations that may not currently have these supports.

A large cross-sectional study published in 2020 demonstrated that these data remained similar, with a lifetime prevalence of 0.21%.⁵ Of the 45,016 participants—representative of the US population based on the 2015 US Census—the average age of AA patients was 41.2 years, with 61.3% being White and not of Hispanic origin.⁵ In recent years, other studies have challenged the narrative that AA predominantly affects White patients.^6-8 A different cross-sectional study utilizing National Alopecia Areata Registry data from 2002 to 2016 suggested that Black patients have greater odds of developing AA.⁶ In this study of 2645 cases of AA, the odds ratios of developing the condition were 1.36 for Blacks, 0.53 for Asians, and 0.83 for Hispanics compared with the referent White population. These results were consistent through the varying subtypes of AA.⁶ In a reply to these findings, Gonzalez and Fleischer⁷ analyzed data from the 2007 to 2016 National Ambulatory Medical Care Survey database with a focus on racial and ethnic prevalence of AA. This study concluded that Latino and non-White individuals had an increased likelihood of clinician visits for AA compared with White individuals.⁷

More evidence of the Black predominance of AA was demonstrated in a study published in 2018. In this large-scale study, 63,960 women from the Nurses’ Health Study (NHS) and 88,368 women from the Nurses’ Health Study II (NHSII) were included to examine prevalence of disease among these US women.⁸ Analysis showed increased odds of AA based on self-reported race in Black and Hispanic women. Lifetime incidence of AA was greater in Black women, with 2.63 and 5.23 in NHS and NHSII, respectively. It was hypothesized that hairstyling practices in Black and Hispanic women may cause AA to be more noticeable,⁸ which may drive patients to seek medical evaluation.

Feaster and McMichael⁹ published information on the epidemiology of AA in a busy hair loss clinic. This retrospective single-institution study of 265 pediatric and adult Black patients with AA seen over a 5-year period showed that patients aged 18 to 34 years were most likely to present for care, which accounted for 35.8% of the study population, followed by patients aged 10 to 17 years, which accounted for 15.1%. This study also found that females were the larger segment of AA patients, with an increased distribution of disease in young patients. Most of these patients (68.2%) had patchy hair loss, and the ophiasis pattern was seen in 15.1%.⁹ Although the pathogenesis of AA is linked to autoimmunity,¹⁰ the leading cause for these epidemiologic findings of increased prevalence in Black patients is still uncertain.

Baricitinib for AA

In June 2022, the FDA announced the first biologic drug approved for the treatment of AA—baricitinib. Baricitinib is an oral, selective, reversible inhibitor of JAK1 and JAK2.³ The phase 3 trials for baricitinib—BRAVE-AA1 (N=654) and BRAVE-AA2 (N=546)—were conducted between March 2019 and May 2020. In these double-blind, parallel-group, randomized, placebo-controlled trials, 33% of the patient population receiving baricitinib accomplished 80% or more scalp coverage at 36 weeks. The Severity of Alopecia Tool (SALT) score also decreased to 20 or less in 36 weeks. The BRAVE-AA1 and BRAVE-AA2 trials consisted of a total of 1200 patients, with only 98 identifying as Black. Of these 98 patients, 33 were randomly selected to receive placebo.³ With studies now suggesting that Black individuals have greater odds of AA compared with White individuals⁶ and Black patients being more likely to seek medical care for AA,⁷ the BRAVE-AA1 and BRAVE-AA2 study population did not allow for significant comparative data for Black patients. These studies did not document Latino patient involvement.³ Future studies in AA must recruit a diversified group of study participants to better reflect the patients with an increased likelihood of presenting with AA.

Other Treatments on the Horizon

Baricitinib likely will remain alone in its class for only a short time. Phase 3 trials have been completed for ritlecitinib, brepocitinib, and deuruxolitinib for AA. Ritlecitinib, an irreversible inhibitor of JAK3 and the tyrosine kinase expressed in hepatocellular carcinoma (TEC) kinase family, has met all end points in a phase 2b/3 study.¹¹ Brepocitinib is an oral tyrosine kinase 2/JAK1 inhibitor,¹² and deuruxolitinib is an investigational JAK1/2 inhibitor for AA.¹³

Prior authorizations have been the initial step for many drugs in varying fields of medical practice. A study completed in 2016 suggested that insurance coverage for biologics used in the treatment of psoriasis was becoming increasingly difficult.¹⁴ Prior authorization requirement rates increased from 16% of patients in 2009 to 75% in 2014. The decision time also increased from 3.7 days in 2009 to 6.7 days in 2014. The most common reason for delay in decisions and denials was due to step therapy.¹⁴ Insurance companies wanted many patients to try less expensive treatment options prior to “stepping up” to more expensive treatments. Although this may be the case in the treatment of psoriasis, the role of step therapy is unclear for patients with AA because there is only 1 FDA-approved medication. This sets out an ambiguous future for our patients with AA and approval for baricitinib.

The time required for the correspondence between insurance companies, clinic staff, and patients for drug approval may delay treatments, and not all providers have enough staff to coordinate and perform this work. For Black patients, who may present more frequently and with more severe disease,⁷ this could lead to a health care disparity due to the likelihood of the increased need for biologic treatment. Because Black patients have an increased likelihood of being uninsured or underinsured,¹⁵ this further decreases the chances of the most severe AA patients receiving the most helpful medication for their condition.

Many pharmaceutical companies have drug cost assistance programs that aim to provide support covering expensive medications for patients unable to afford them. Although this is a good first step, treatment with any JAK inhibitor potentially can be lifelong. Regarding the social determinants of health, it is known that access to medications does not solely depend on cost. Transportation and access to qualified health professionals are among the issues that create barriers to health care. Instilling long-term practices to ensure equal access to JAK inhibitors and treatment of AA may be the cornerstone to treating AA with equity. Whether we require pharmaceutical companies to make sure all patients have equal access to medications or provide community resources to hairstylists and federally qualified health centers, raising awareness and advocating for and creating attainable access to treatment modalities is imperative to providing well-rounded care to a diverse population.

With the introduction of the first US Food and Drug Administration (FDA)–approved medication for alopecia areata (AA)—the Janus kinase (JAK) inhibitor, baricitinib—there is an important focus on this disease in the literature and for practicing dermatologists. Known by all as an autoimmune genetic disease that causes relapsing and remitting nonscarring hair loss, AA is a condition where the psychological burden has been less widely recognized. Patients with AA have reported lower health-related quality of life scores compared to patients with other skin conditions, including psoriasis or atopic dermatitis. In addition, a lesser amount of scalp coverage is negatively correlated to health-related quality of life scores.¹ Patients with AA also have a 39% lifetime prevalence of major depressive disorder and generalized anxiety disorder.² The treatment of AA has been a hodgepodge of topical, intralesional, and systemic agents, all with indirect immunosuppressive or anagen prolongation effects. Now that there is an approved therapy for AA with more treatments likely to be approved in the near future, there must be a focus on real-world outcomes. With the dawn of a new era in the treatment of AA as well as new information showcasing an altered prevalence of AA in skin of color, highlighting disparities among this population may help ease challenges dermatologic providers will face.

Efficacy of Baricitinib in Different Races and Ethnicities

How will patients of different races and ethnicities respond to this new treatment, and how will their emotional health be affected? The 2 phase 3 pivotal trials showing efficacy of baricitinib in AA included Black and Latino patients but not in a way that is representative of the US population.³ Until recently, the most commonly used prevalence of AA in the United States was from the NHANES I study completed between 1971 and 1974, which was between 0.1% and 0.2%⁴ with minimal focus on race and ethnicity. Recent studies suggest that there may be increased prevalence of this condition in Black patients in the United States. These new findings raise concern around access to care and treatment and the need to tailor psychosocial interventions for populations that may not currently have these supports.

A large cross-sectional study published in 2020 demonstrated that these data remained similar, with a lifetime prevalence of 0.21%.⁵ Of the 45,016 participants—representative of the US population based on the 2015 US Census—the average age of AA patients was 41.2 years, with 61.3% being White and not of Hispanic origin.⁵ In recent years, other studies have challenged the narrative that AA predominantly affects White patients.^6-8 A different cross-sectional study utilizing National Alopecia Areata Registry data from 2002 to 2016 suggested that Black patients have greater odds of developing AA.⁶ In this study of 2645 cases of AA, the odds ratios of developing the condition were 1.36 for Blacks, 0.53 for Asians, and 0.83 for Hispanics compared with the referent White population. These results were consistent through the varying subtypes of AA.⁶ In a reply to these findings, Gonzalez and Fleischer⁷ analyzed data from the 2007 to 2016 National Ambulatory Medical Care Survey database with a focus on racial and ethnic prevalence of AA. This study concluded that Latino and non-White individuals had an increased likelihood of clinician visits for AA compared with White individuals.⁷

More evidence of the Black predominance of AA was demonstrated in a study published in 2018. In this large-scale study, 63,960 women from the Nurses’ Health Study (NHS) and 88,368 women from the Nurses’ Health Study II (NHSII) were included to examine prevalence of disease among these US women.⁸ Analysis showed increased odds of AA based on self-reported race in Black and Hispanic women. Lifetime incidence of AA was greater in Black women, with 2.63 and 5.23 in NHS and NHSII, respectively. It was hypothesized that hairstyling practices in Black and Hispanic women may cause AA to be more noticeable,⁸ which may drive patients to seek medical evaluation.

Feaster and McMichael⁹ published information on the epidemiology of AA in a busy hair loss clinic. This retrospective single-institution study of 265 pediatric and adult Black patients with AA seen over a 5-year period showed that patients aged 18 to 34 years were most likely to present for care, which accounted for 35.8% of the study population, followed by patients aged 10 to 17 years, which accounted for 15.1%. This study also found that females were the larger segment of AA patients, with an increased distribution of disease in young patients. Most of these patients (68.2%) had patchy hair loss, and the ophiasis pattern was seen in 15.1%.⁹ Although the pathogenesis of AA is linked to autoimmunity,¹⁰ the leading cause for these epidemiologic findings of increased prevalence in Black patients is still uncertain.

Baricitinib for AA

In June 2022, the FDA announced the first biologic drug approved for the treatment of AA—baricitinib. Baricitinib is an oral, selective, reversible inhibitor of JAK1 and JAK2.³ The phase 3 trials for baricitinib—BRAVE-AA1 (N=654) and BRAVE-AA2 (N=546)—were conducted between March 2019 and May 2020. In these double-blind, parallel-group, randomized, placebo-controlled trials, 33% of the patient population receiving baricitinib accomplished 80% or more scalp coverage at 36 weeks. The Severity of Alopecia Tool (SALT) score also decreased to 20 or less in 36 weeks. The BRAVE-AA1 and BRAVE-AA2 trials consisted of a total of 1200 patients, with only 98 identifying as Black. Of these 98 patients, 33 were randomly selected to receive placebo.³ With studies now suggesting that Black individuals have greater odds of AA compared with White individuals⁶ and Black patients being more likely to seek medical care for AA,⁷ the BRAVE-AA1 and BRAVE-AA2 study population did not allow for significant comparative data for Black patients. These studies did not document Latino patient involvement.³ Future studies in AA must recruit a diversified group of study participants to better reflect the patients with an increased likelihood of presenting with AA.

Other Treatments on the Horizon

Baricitinib likely will remain alone in its class for only a short time. Phase 3 trials have been completed for ritlecitinib, brepocitinib, and deuruxolitinib for AA. Ritlecitinib, an irreversible inhibitor of JAK3 and the tyrosine kinase expressed in hepatocellular carcinoma (TEC) kinase family, has met all end points in a phase 2b/3 study.¹¹ Brepocitinib is an oral tyrosine kinase 2/JAK1 inhibitor,¹² and deuruxolitinib is an investigational JAK1/2 inhibitor for AA.¹³

Prior authorizations have been the initial step for many drugs in varying fields of medical practice. A study completed in 2016 suggested that insurance coverage for biologics used in the treatment of psoriasis was becoming increasingly difficult.¹⁴ Prior authorization requirement rates increased from 16% of patients in 2009 to 75% in 2014. The decision time also increased from 3.7 days in 2009 to 6.7 days in 2014. The most common reason for delay in decisions and denials was due to step therapy.¹⁴ Insurance companies wanted many patients to try less expensive treatment options prior to “stepping up” to more expensive treatments. Although this may be the case in the treatment of psoriasis, the role of step therapy is unclear for patients with AA because there is only 1 FDA-approved medication. This sets out an ambiguous future for our patients with AA and approval for baricitinib.

The time required for the correspondence between insurance companies, clinic staff, and patients for drug approval may delay treatments, and not all providers have enough staff to coordinate and perform this work. For Black patients, who may present more frequently and with more severe disease,⁷ this could lead to a health care disparity due to the likelihood of the increased need for biologic treatment. Because Black patients have an increased likelihood of being uninsured or underinsured,¹⁵ this further decreases the chances of the most severe AA patients receiving the most helpful medication for their condition.

Many pharmaceutical companies have drug cost assistance programs that aim to provide support covering expensive medications for patients unable to afford them. Although this is a good first step, treatment with any JAK inhibitor potentially can be lifelong. Regarding the social determinants of health, it is known that access to medications does not solely depend on cost. Transportation and access to qualified health professionals are among the issues that create barriers to health care. Instilling long-term practices to ensure equal access to JAK inhibitors and treatment of AA may be the cornerstone to treating AA with equity. Whether we require pharmaceutical companies to make sure all patients have equal access to medications or provide community resources to hairstylists and federally qualified health centers, raising awareness and advocating for and creating attainable access to treatment modalities is imperative to providing well-rounded care to a diverse population.

Practice Gap

Cutaneous surgery involves many areas where skin is quite thin and fragile, which often is encountered in elderly patients; the forearms and lower legs are the most frequent locations for thin skin.¹ Dermatologic surgeons frequently encounter these situations, making this a highly practical arena for technical improvements.

For many of these patients, there is little meaningful dermis for placement of subcutaneous sutures. Therefore, a common approach following surgery, particularly following Mohs micrographic surgery in which tumors and defects typically are larger, is healing by secondary intention.² Although healing by secondary intention often is a reasonable option, we have found that maximizing the use of epidermal skin for primary closure can be an effective means of closing many such defects. Antimicrobial reinforced skin closure strips have been incorporated in wound closure for thin skin. However, earlier efforts involving reinforcement perpendicular to the wound lacked critical details or used a different technique.³

The Technique

We developed a novel effective closure technique that minimizes these problems. Our technique has been used on the wounds of hundreds of patients with satisfying results. Early on, we used multiple variations to optimize outcomes, including different sizes of sutures and reinforced skin closure strips, application of medical liquid adhesive, liquid adhesive, and varying postoperative dressings. For 3 years, we tracked outcomes in-house and gradually narrowed down our successes into a single, user-friendly paradigm.

Supplies—To perform this technique, required supplies include:

• 2-0 Polypropylene suture with a PS-2 needle, or the equivalent. Polyglactin or silk suture can be utilized if a less-rigid suture is desired; however, we primarily have used polypropylene for repairs with good results. Each repair requires at least 2 sutures.

• Reinforced skin closure strips (1×5 inches). This width affords increased strength.

• Conforming stretch bandage and elastic self-adherent wrap.

• Polysporin (bacitracin zinc, polymyxin B sulfate, and petrolatum)(Johnson & Johnson).

• All usual surgical instruments and supplies, including paper tape and nonadherent gauze (surgeon dependent).

Step-by-step Technique—Close the wound using the following steps:

1. Once the defect is finalized following Mohs micrographic surgery or excision, excise the ellipse to be utilized for the closure and perform complete hemostasis.

2. Place 2 layers of reinforced skin closure strips—one on top of the other—along each side of the defect, leaving approximately 1 cm of uncovered skin between the wound edges and the reinforced skin closure strips (Figure, A).

3. Take a big-bite pulley suture about one-third of the way from one end of the ellipse, with both punctures passing through the reinforced skin closure strips. Leave that in place or have the assistant hold it and wait. Place a second suture immediately adjacent to the pulley suture. Once that suture is placed but still untied, have the assistant carefully pull the pulley suture outward away from the wound edge while you carefully bring the suture together and tie it off gently (Figure, B). Doing this utilizes the pulley ability of the suture to protect the skin from tearing and releases sufficient pressure on the single suture so that it can be easily tightened without risk to the fragile skin.

4. Repeat step 3, this time placing a pulley suture near the midline of the ellipse and the subsequent single suture adjacent to it.

5. Take pulley sutures repeatedly as in steps 3 and 4 until multiple sutures are secured in place. Replace the pulley sutures with single sutures because the double-pulley sutures in areas of lower vascularity tend to have, in our experience, a slightly increased incidence of focal necrosis in comparison to single sutures.

6. Make a concerted attempt to keep as much blood as possible off the reinforced skin closure strips throughout the procedure; the less dried blood on the reinforced skin closure strips, the cleaner and better the final closure (Figure, C).

7. Most of these cases involve the forearms and the legs below the knees. Because any increase in pressure or swelling on the wound can result in skin breakdown, postoperative dressing is critical. We use a layered approach; the following sequence can be modified to the preference of the surgeon: Polysporin (bacitracin zinc, polymyxin B sulfate, and petrolatum), nonadherent gauze, paper tape, conforming stretch bandage, and elastic self-adherent wrap. Minimizing swelling and infection are the primary goals. The wrap is left on for 1 week and should be kept dry.

8. Have the patient return to the office in 1 week. Unwrap the entire wound; trim back the reinforced skin closure strips; and have the patient utilize typical wound care at home thereafter consisting of cleaning and application of Polysporin or plain petrolatum, nonadherent gauze, and a paper-tape bandage. Because liquid adhesive is not utilized in this technique, the reinforced skin closure strips can be carefully removed without tearing skin. Leave sutures in for 3 weeks for arm procedures and 4 weeks for leg procedures, unless irritation develops or rapid suture overgrowth occurs in either location.

Complications

Most outcomes after using this technique are typical of optimized linear surgeries, with reduced scarring and complete wound healing (Figure, D). We seldom see complications but the following are possible:

• Bleeding occurs but rarely; the weeklong wrap likely provides great benefit.

• Infection is rare but does occur occasionally, as in any surgical procedure.

• Breakdown of the entire wound is rare; however, we occasionally see focal necrosis near 1 stitch—or rarely 2 stitches—that does not require intervention, apart from longer use of topical Polysporin or petrolatum alone to maximize healing by secondary intention in those small areas.• Despite simple suture placement far from the edge of the wound, wound inversion is seldom a problem because these taut closures have a tendency to expand slightly due to postoperative swelling.

Practice Implications

Any experienced dermatologic surgeon can perfect this technique for closing a wound in thin skin. Because wound closure in areas of fragile skin frequently is encountered in cutaneous surgery, we hope that utilizing this technique results in an optimal outcome for many patients.

Practice Gap

Cutaneous surgery involves many areas where skin is quite thin and fragile, which often is encountered in elderly patients; the forearms and lower legs are the most frequent locations for thin skin.¹ Dermatologic surgeons frequently encounter these situations, making this a highly practical arena for technical improvements.

For many of these patients, there is little meaningful dermis for placement of subcutaneous sutures. Therefore, a common approach following surgery, particularly following Mohs micrographic surgery in which tumors and defects typically are larger, is healing by secondary intention.² Although healing by secondary intention often is a reasonable option, we have found that maximizing the use of epidermal skin for primary closure can be an effective means of closing many such defects. Antimicrobial reinforced skin closure strips have been incorporated in wound closure for thin skin. However, earlier efforts involving reinforcement perpendicular to the wound lacked critical details or used a different technique.³

The Technique

We developed a novel effective closure technique that minimizes these problems. Our technique has been used on the wounds of hundreds of patients with satisfying results. Early on, we used multiple variations to optimize outcomes, including different sizes of sutures and reinforced skin closure strips, application of medical liquid adhesive, liquid adhesive, and varying postoperative dressings. For 3 years, we tracked outcomes in-house and gradually narrowed down our successes into a single, user-friendly paradigm.

Supplies—To perform this technique, required supplies include:

• 2-0 Polypropylene suture with a PS-2 needle, or the equivalent. Polyglactin or silk suture can be utilized if a less-rigid suture is desired; however, we primarily have used polypropylene for repairs with good results. Each repair requires at least 2 sutures.

• Reinforced skin closure strips (1×5 inches). This width affords increased strength.

• Conforming stretch bandage and elastic self-adherent wrap.

• Polysporin (bacitracin zinc, polymyxin B sulfate, and petrolatum)(Johnson & Johnson).

• All usual surgical instruments and supplies, including paper tape and nonadherent gauze (surgeon dependent).

Step-by-step Technique—Close the wound using the following steps:

1. Once the defect is finalized following Mohs micrographic surgery or excision, excise the ellipse to be utilized for the closure and perform complete hemostasis.

2. Place 2 layers of reinforced skin closure strips—one on top of the other—along each side of the defect, leaving approximately 1 cm of uncovered skin between the wound edges and the reinforced skin closure strips (Figure, A).

3. Take a big-bite pulley suture about one-third of the way from one end of the ellipse, with both punctures passing through the reinforced skin closure strips. Leave that in place or have the assistant hold it and wait. Place a second suture immediately adjacent to the pulley suture. Once that suture is placed but still untied, have the assistant carefully pull the pulley suture outward away from the wound edge while you carefully bring the suture together and tie it off gently (Figure, B). Doing this utilizes the pulley ability of the suture to protect the skin from tearing and releases sufficient pressure on the single suture so that it can be easily tightened without risk to the fragile skin.

4. Repeat step 3, this time placing a pulley suture near the midline of the ellipse and the subsequent single suture adjacent to it.

5. Take pulley sutures repeatedly as in steps 3 and 4 until multiple sutures are secured in place. Replace the pulley sutures with single sutures because the double-pulley sutures in areas of lower vascularity tend to have, in our experience, a slightly increased incidence of focal necrosis in comparison to single sutures.

6. Make a concerted attempt to keep as much blood as possible off the reinforced skin closure strips throughout the procedure; the less dried blood on the reinforced skin closure strips, the cleaner and better the final closure (Figure, C).

7. Most of these cases involve the forearms and the legs below the knees. Because any increase in pressure or swelling on the wound can result in skin breakdown, postoperative dressing is critical. We use a layered approach; the following sequence can be modified to the preference of the surgeon: Polysporin (bacitracin zinc, polymyxin B sulfate, and petrolatum), nonadherent gauze, paper tape, conforming stretch bandage, and elastic self-adherent wrap. Minimizing swelling and infection are the primary goals. The wrap is left on for 1 week and should be kept dry.

8. Have the patient return to the office in 1 week. Unwrap the entire wound; trim back the reinforced skin closure strips; and have the patient utilize typical wound care at home thereafter consisting of cleaning and application of Polysporin or plain petrolatum, nonadherent gauze, and a paper-tape bandage. Because liquid adhesive is not utilized in this technique, the reinforced skin closure strips can be carefully removed without tearing skin. Leave sutures in for 3 weeks for arm procedures and 4 weeks for leg procedures, unless irritation develops or rapid suture overgrowth occurs in either location.

Complications

Most outcomes after using this technique are typical of optimized linear surgeries, with reduced scarring and complete wound healing (Figure, D). We seldom see complications but the following are possible:

• Bleeding occurs but rarely; the weeklong wrap likely provides great benefit.

• Infection is rare but does occur occasionally, as in any surgical procedure.

• Breakdown of the entire wound is rare; however, we occasionally see focal necrosis near 1 stitch—or rarely 2 stitches—that does not require intervention, apart from longer use of topical Polysporin or petrolatum alone to maximize healing by secondary intention in those small areas.• Despite simple suture placement far from the edge of the wound, wound inversion is seldom a problem because these taut closures have a tendency to expand slightly due to postoperative swelling.

Practice Implications

Any experienced dermatologic surgeon can perfect this technique for closing a wound in thin skin. Because wound closure in areas of fragile skin frequently is encountered in cutaneous surgery, we hope that utilizing this technique results in an optimal outcome for many patients.

Practice Gap

Cutaneous surgery involves many areas where skin is quite thin and fragile, which often is encountered in elderly patients; the forearms and lower legs are the most frequent locations for thin skin.¹ Dermatologic surgeons frequently encounter these situations, making this a highly practical arena for technical improvements.

For many of these patients, there is little meaningful dermis for placement of subcutaneous sutures. Therefore, a common approach following surgery, particularly following Mohs micrographic surgery in which tumors and defects typically are larger, is healing by secondary intention.² Although healing by secondary intention often is a reasonable option, we have found that maximizing the use of epidermal skin for primary closure can be an effective means of closing many such defects. Antimicrobial reinforced skin closure strips have been incorporated in wound closure for thin skin. However, earlier efforts involving reinforcement perpendicular to the wound lacked critical details or used a different technique.³

The Technique

We developed a novel effective closure technique that minimizes these problems. Our technique has been used on the wounds of hundreds of patients with satisfying results. Early on, we used multiple variations to optimize outcomes, including different sizes of sutures and reinforced skin closure strips, application of medical liquid adhesive, liquid adhesive, and varying postoperative dressings. For 3 years, we tracked outcomes in-house and gradually narrowed down our successes into a single, user-friendly paradigm.

Supplies—To perform this technique, required supplies include:

• 2-0 Polypropylene suture with a PS-2 needle, or the equivalent. Polyglactin or silk suture can be utilized if a less-rigid suture is desired; however, we primarily have used polypropylene for repairs with good results. Each repair requires at least 2 sutures.

• Reinforced skin closure strips (1×5 inches). This width affords increased strength.

• Conforming stretch bandage and elastic self-adherent wrap.

• Polysporin (bacitracin zinc, polymyxin B sulfate, and petrolatum)(Johnson & Johnson).

• All usual surgical instruments and supplies, including paper tape and nonadherent gauze (surgeon dependent).

Step-by-step Technique—Close the wound using the following steps:

1. Once the defect is finalized following Mohs micrographic surgery or excision, excise the ellipse to be utilized for the closure and perform complete hemostasis.

2. Place 2 layers of reinforced skin closure strips—one on top of the other—along each side of the defect, leaving approximately 1 cm of uncovered skin between the wound edges and the reinforced skin closure strips (Figure, A).

3. Take a big-bite pulley suture about one-third of the way from one end of the ellipse, with both punctures passing through the reinforced skin closure strips. Leave that in place or have the assistant hold it and wait. Place a second suture immediately adjacent to the pulley suture. Once that suture is placed but still untied, have the assistant carefully pull the pulley suture outward away from the wound edge while you carefully bring the suture together and tie it off gently (Figure, B). Doing this utilizes the pulley ability of the suture to protect the skin from tearing and releases sufficient pressure on the single suture so that it can be easily tightened without risk to the fragile skin.

4. Repeat step 3, this time placing a pulley suture near the midline of the ellipse and the subsequent single suture adjacent to it.

5. Take pulley sutures repeatedly as in steps 3 and 4 until multiple sutures are secured in place. Replace the pulley sutures with single sutures because the double-pulley sutures in areas of lower vascularity tend to have, in our experience, a slightly increased incidence of focal necrosis in comparison to single sutures.

6. Make a concerted attempt to keep as much blood as possible off the reinforced skin closure strips throughout the procedure; the less dried blood on the reinforced skin closure strips, the cleaner and better the final closure (Figure, C).

7. Most of these cases involve the forearms and the legs below the knees. Because any increase in pressure or swelling on the wound can result in skin breakdown, postoperative dressing is critical. We use a layered approach; the following sequence can be modified to the preference of the surgeon: Polysporin (bacitracin zinc, polymyxin B sulfate, and petrolatum), nonadherent gauze, paper tape, conforming stretch bandage, and elastic self-adherent wrap. Minimizing swelling and infection are the primary goals. The wrap is left on for 1 week and should be kept dry.

8. Have the patient return to the office in 1 week. Unwrap the entire wound; trim back the reinforced skin closure strips; and have the patient utilize typical wound care at home thereafter consisting of cleaning and application of Polysporin or plain petrolatum, nonadherent gauze, and a paper-tape bandage. Because liquid adhesive is not utilized in this technique, the reinforced skin closure strips can be carefully removed without tearing skin. Leave sutures in for 3 weeks for arm procedures and 4 weeks for leg procedures, unless irritation develops or rapid suture overgrowth occurs in either location.

Complications

Most outcomes after using this technique are typical of optimized linear surgeries, with reduced scarring and complete wound healing (Figure, D). We seldom see complications but the following are possible:

• Bleeding occurs but rarely; the weeklong wrap likely provides great benefit.

• Infection is rare but does occur occasionally, as in any surgical procedure.

• Breakdown of the entire wound is rare; however, we occasionally see focal necrosis near 1 stitch—or rarely 2 stitches—that does not require intervention, apart from longer use of topical Polysporin or petrolatum alone to maximize healing by secondary intention in those small areas.• Despite simple suture placement far from the edge of the wound, wound inversion is seldom a problem because these taut closures have a tendency to expand slightly due to postoperative swelling.

Practice Implications

Any experienced dermatologic surgeon can perfect this technique for closing a wound in thin skin. Because wound closure in areas of fragile skin frequently is encountered in cutaneous surgery, we hope that utilizing this technique results in an optimal outcome for many patients.

LAS VEGAS – Vitiligo affects individuals of all ages, and “the social impact is huge,” David Rosmarin, MD, said in a presentation at MedscapeLive’s annual Las Vegas Dermatology Seminar.

Vitiligo, an autoimmune condition that results in patches of skin depigmentation, occurs in 0.5% to 2% of the population. The average age of onset is 20 years, with 25% of cases occurring before age 10, and 70%-80% of cases by age 30 years, which means a long-term effect on quality of life, especially for younger patients, said Dr. Rosmarin, vice chair of education and research and director of the clinical trials unit at Tufts University, Boston.

SolStock/Moment/Getty Images

Studies have shown that 95% of 15- to 17-year-olds with vitiligo are bothered by it, as are approximately 50% of children aged 6-14 years, he said. Although patients with more extensive lesions on the face, arms, legs, and hands report worse quality of life, they report that uncontrolled progression of vitiligo is more concerning than the presence of lesions in exposed areas, he noted.

The current strategy for getting vitiligo under control is a two-step process, said Dr. Rosmarin. First, improve the skin environment by suppressing the overactive immune system, then encourage repigmentation and “nudge the melanocytes to return,” he said.

Topical ruxolitinib, a Janus kinase (JAK) inhibitor, is the latest tool for dermatologists to help give the melanocytes that nudge. In July 2022, the Food and Drug Administration approved ruxolitinib cream for treating nonsegmental vitiligo in patients 12 years of age and older – the first treatment approved to repigment patients with vitiligo.

Vitiligo is driven in part by interferon (IFN)-gamma signaling through JAK 1 and 2, and ruxolitinib acts as an inhibitor, Dr. Rosmarin said.

In the TRuE-V1 and TRuE-V2 studies presented at the 2022 European Academy of Dermatology and Venereology meeting in Milan, adolescents and adults with vitiligo who were randomized to 1.5% ruxolitinib cream twice daily showed significant improvement over those randomized to the vehicle by 24 weeks, at which time all patients could continue with ruxolitinib through 52 weeks, he said.

Dr. Rosmarin presented 52-week data from the TRuE-V1 and TRuE-V2 studies at the 2022 American Academy of Dermatology meeting in Boston. He was the lead author of the studies that were subsequently published in the New England Journal of Medicine.

In the two studies, 52.6% and 48% of the patients in the ruxolitinib groups achieved the primary outcome of at least 75% improvement on the Facial Vitiligo Area Scoring Index (F-VASI75) by 52 weeks, compared with 26.8% and 29.6% of patients on the vehicle, respectively.

In addition, at 52 weeks, 53.2% and 49.2% of patients treated with ruxolitinib in the two studies achieved 50% improvement on the Total Vitiligo Area Scoring Index (T-VASI50), a clinician assessment of affected body surface area and level of depigmentation, compared with 31.7% and 22.2% of those on vehicle, respectively.

Patient satisfaction was high with ruxolitinib, Dr. Rosmarin said. In the TRuE-V1 and TRuE-V2 studies, 39.9% and 32.8% of patients, respectively, achieved a successful treatment response based on the patient-reported Vitiligo Noticeability Scale (VNS) by week 52, versus 19.5% and 13.6% of those on vehicle.

Ruxolitinib cream was well tolerated, with “no clinically significant application site reactions or serious treatment-related adverse events,” he noted. The most common treatment-related adverse events across the TRuE-V1 and TRuE-V2 studies were acne at the application site (affecting about 6% of patients) and pruritus at the application site about (affecting 5%), said Dr. Rosmarin.

JAK inhibitors, including ruxolitinib, baricitinib, and tofacitinib, have shown effectiveness for vitiligo, which supports the potential role of the IFN-gamma-chemokine signaling axis in the pathogenesis of the disease, said Dr. Rosmarin. However, more studies are required to determine the ideal dosage of JAK inhibitors for the treatment of vitiligo, and to identify other inflammatory pathways that may be implicated in the pathogenesis of this condition.

Ruxolitinib’s success has been consistent across subgroups of age, gender, race, geographic region, and Fitzpatrick skin phototype. Notably, ruxolitinib was effective among the adolescent population, with approximately 60% achieving T-VASI50 and success based on VNS in TRuE-V1 and TRuE-V2.

An oral version of ruxolitinib is in clinical trials, which “makes a lot of sense,” Dr. Rosmarin said. “Patients don’t always have localized disease,” and such patients may benefit from an oral therapy. Topicals may have the advantage in terms of safety, but questions of maintenance remain, he said. Oral treatments may be useful for patients with large body surface areas affected, and those with unstable or progressive disease, he added.

Areas for additional research include combination therapy with ruxolitinib and phototherapy, and an anti-IL 15 therapy in the pipeline has the potential to drive vitiligo into remission, Dr. Rosmarin said. In a study known as REVEAL that is still recruiting patients, researchers will test the efficacy of an IL-15 inhibitor known as AMG 714 to induce facial repigmentation in adults with vitiligo.

Dr. Rosmarin disclosed ties with AbbVie, Abcuro, AltruBio, Amgen, Arena Pharmaceuticals, Boehringer Ingelheim, Bristol Myers Squibb Company, Celgene, Concert Pharmaceuticals, CSL Behring, Dermavant, Dermira, Eli Lilly, Galderma, Incyte, Janssen, Kyowa Kirin, Merck, Novartis, Pfizer, Regeneron, Revolo, Sanofi, Sun, UCB, and Viela Bio.

MedscapeLive and this news organization are owned by the same parent company.

LAS VEGAS – Vitiligo affects individuals of all ages, and “the social impact is huge,” David Rosmarin, MD, said in a presentation at MedscapeLive’s annual Las Vegas Dermatology Seminar.

Vitiligo, an autoimmune condition that results in patches of skin depigmentation, occurs in 0.5% to 2% of the population. The average age of onset is 20 years, with 25% of cases occurring before age 10, and 70%-80% of cases by age 30 years, which means a long-term effect on quality of life, especially for younger patients, said Dr. Rosmarin, vice chair of education and research and director of the clinical trials unit at Tufts University, Boston.

SolStock/Moment/Getty Images

Studies have shown that 95% of 15- to 17-year-olds with vitiligo are bothered by it, as are approximately 50% of children aged 6-14 years, he said. Although patients with more extensive lesions on the face, arms, legs, and hands report worse quality of life, they report that uncontrolled progression of vitiligo is more concerning than the presence of lesions in exposed areas, he noted.

The current strategy for getting vitiligo under control is a two-step process, said Dr. Rosmarin. First, improve the skin environment by suppressing the overactive immune system, then encourage repigmentation and “nudge the melanocytes to return,” he said.

Topical ruxolitinib, a Janus kinase (JAK) inhibitor, is the latest tool for dermatologists to help give the melanocytes that nudge. In July 2022, the Food and Drug Administration approved ruxolitinib cream for treating nonsegmental vitiligo in patients 12 years of age and older – the first treatment approved to repigment patients with vitiligo.

Vitiligo is driven in part by interferon (IFN)-gamma signaling through JAK 1 and 2, and ruxolitinib acts as an inhibitor, Dr. Rosmarin said.

In the TRuE-V1 and TRuE-V2 studies presented at the 2022 European Academy of Dermatology and Venereology meeting in Milan, adolescents and adults with vitiligo who were randomized to 1.5% ruxolitinib cream twice daily showed significant improvement over those randomized to the vehicle by 24 weeks, at which time all patients could continue with ruxolitinib through 52 weeks, he said.

Dr. Rosmarin presented 52-week data from the TRuE-V1 and TRuE-V2 studies at the 2022 American Academy of Dermatology meeting in Boston. He was the lead author of the studies that were subsequently published in the New England Journal of Medicine.

In the two studies, 52.6% and 48% of the patients in the ruxolitinib groups achieved the primary outcome of at least 75% improvement on the Facial Vitiligo Area Scoring Index (F-VASI75) by 52 weeks, compared with 26.8% and 29.6% of patients on the vehicle, respectively.

In addition, at 52 weeks, 53.2% and 49.2% of patients treated with ruxolitinib in the two studies achieved 50% improvement on the Total Vitiligo Area Scoring Index (T-VASI50), a clinician assessment of affected body surface area and level of depigmentation, compared with 31.7% and 22.2% of those on vehicle, respectively.

Patient satisfaction was high with ruxolitinib, Dr. Rosmarin said. In the TRuE-V1 and TRuE-V2 studies, 39.9% and 32.8% of patients, respectively, achieved a successful treatment response based on the patient-reported Vitiligo Noticeability Scale (VNS) by week 52, versus 19.5% and 13.6% of those on vehicle.

Ruxolitinib cream was well tolerated, with “no clinically significant application site reactions or serious treatment-related adverse events,” he noted. The most common treatment-related adverse events across the TRuE-V1 and TRuE-V2 studies were acne at the application site (affecting about 6% of patients) and pruritus at the application site about (affecting 5%), said Dr. Rosmarin.

JAK inhibitors, including ruxolitinib, baricitinib, and tofacitinib, have shown effectiveness for vitiligo, which supports the potential role of the IFN-gamma-chemokine signaling axis in the pathogenesis of the disease, said Dr. Rosmarin. However, more studies are required to determine the ideal dosage of JAK inhibitors for the treatment of vitiligo, and to identify other inflammatory pathways that may be implicated in the pathogenesis of this condition.

Ruxolitinib’s success has been consistent across subgroups of age, gender, race, geographic region, and Fitzpatrick skin phototype. Notably, ruxolitinib was effective among the adolescent population, with approximately 60% achieving T-VASI50 and success based on VNS in TRuE-V1 and TRuE-V2.

An oral version of ruxolitinib is in clinical trials, which “makes a lot of sense,” Dr. Rosmarin said. “Patients don’t always have localized disease,” and such patients may benefit from an oral therapy. Topicals may have the advantage in terms of safety, but questions of maintenance remain, he said. Oral treatments may be useful for patients with large body surface areas affected, and those with unstable or progressive disease, he added.

Areas for additional research include combination therapy with ruxolitinib and phototherapy, and an anti-IL 15 therapy in the pipeline has the potential to drive vitiligo into remission, Dr. Rosmarin said. In a study known as REVEAL that is still recruiting patients, researchers will test the efficacy of an IL-15 inhibitor known as AMG 714 to induce facial repigmentation in adults with vitiligo.

Dr. Rosmarin disclosed ties with AbbVie, Abcuro, AltruBio, Amgen, Arena Pharmaceuticals, Boehringer Ingelheim, Bristol Myers Squibb Company, Celgene, Concert Pharmaceuticals, CSL Behring, Dermavant, Dermira, Eli Lilly, Galderma, Incyte, Janssen, Kyowa Kirin, Merck, Novartis, Pfizer, Regeneron, Revolo, Sanofi, Sun, UCB, and Viela Bio.

MedscapeLive and this news organization are owned by the same parent company.

LAS VEGAS – Vitiligo affects individuals of all ages, and “the social impact is huge,” David Rosmarin, MD, said in a presentation at MedscapeLive’s annual Las Vegas Dermatology Seminar.

Vitiligo, an autoimmune condition that results in patches of skin depigmentation, occurs in 0.5% to 2% of the population. The average age of onset is 20 years, with 25% of cases occurring before age 10, and 70%-80% of cases by age 30 years, which means a long-term effect on quality of life, especially for younger patients, said Dr. Rosmarin, vice chair of education and research and director of the clinical trials unit at Tufts University, Boston.

SolStock/Moment/Getty Images

Studies have shown that 95% of 15- to 17-year-olds with vitiligo are bothered by it, as are approximately 50% of children aged 6-14 years, he said. Although patients with more extensive lesions on the face, arms, legs, and hands report worse quality of life, they report that uncontrolled progression of vitiligo is more concerning than the presence of lesions in exposed areas, he noted.

The current strategy for getting vitiligo under control is a two-step process, said Dr. Rosmarin. First, improve the skin environment by suppressing the overactive immune system, then encourage repigmentation and “nudge the melanocytes to return,” he said.

Topical ruxolitinib, a Janus kinase (JAK) inhibitor, is the latest tool for dermatologists to help give the melanocytes that nudge. In July 2022, the Food and Drug Administration approved ruxolitinib cream for treating nonsegmental vitiligo in patients 12 years of age and older – the first treatment approved to repigment patients with vitiligo.

Vitiligo is driven in part by interferon (IFN)-gamma signaling through JAK 1 and 2, and ruxolitinib acts as an inhibitor, Dr. Rosmarin said.

In the TRuE-V1 and TRuE-V2 studies presented at the 2022 European Academy of Dermatology and Venereology meeting in Milan, adolescents and adults with vitiligo who were randomized to 1.5% ruxolitinib cream twice daily showed significant improvement over those randomized to the vehicle by 24 weeks, at which time all patients could continue with ruxolitinib through 52 weeks, he said.

Dr. Rosmarin presented 52-week data from the TRuE-V1 and TRuE-V2 studies at the 2022 American Academy of Dermatology meeting in Boston. He was the lead author of the studies that were subsequently published in the New England Journal of Medicine.

In the two studies, 52.6% and 48% of the patients in the ruxolitinib groups achieved the primary outcome of at least 75% improvement on the Facial Vitiligo Area Scoring Index (F-VASI75) by 52 weeks, compared with 26.8% and 29.6% of patients on the vehicle, respectively.

In addition, at 52 weeks, 53.2% and 49.2% of patients treated with ruxolitinib in the two studies achieved 50% improvement on the Total Vitiligo Area Scoring Index (T-VASI50), a clinician assessment of affected body surface area and level of depigmentation, compared with 31.7% and 22.2% of those on vehicle, respectively.

Patient satisfaction was high with ruxolitinib, Dr. Rosmarin said. In the TRuE-V1 and TRuE-V2 studies, 39.9% and 32.8% of patients, respectively, achieved a successful treatment response based on the patient-reported Vitiligo Noticeability Scale (VNS) by week 52, versus 19.5% and 13.6% of those on vehicle.

Ruxolitinib cream was well tolerated, with “no clinically significant application site reactions or serious treatment-related adverse events,” he noted. The most common treatment-related adverse events across the TRuE-V1 and TRuE-V2 studies were acne at the application site (affecting about 6% of patients) and pruritus at the application site about (affecting 5%), said Dr. Rosmarin.

JAK inhibitors, including ruxolitinib, baricitinib, and tofacitinib, have shown effectiveness for vitiligo, which supports the potential role of the IFN-gamma-chemokine signaling axis in the pathogenesis of the disease, said Dr. Rosmarin. However, more studies are required to determine the ideal dosage of JAK inhibitors for the treatment of vitiligo, and to identify other inflammatory pathways that may be implicated in the pathogenesis of this condition.

Ruxolitinib’s success has been consistent across subgroups of age, gender, race, geographic region, and Fitzpatrick skin phototype. Notably, ruxolitinib was effective among the adolescent population, with approximately 60% achieving T-VASI50 and success based on VNS in TRuE-V1 and TRuE-V2.

An oral version of ruxolitinib is in clinical trials, which “makes a lot of sense,” Dr. Rosmarin said. “Patients don’t always have localized disease,” and such patients may benefit from an oral therapy. Topicals may have the advantage in terms of safety, but questions of maintenance remain, he said. Oral treatments may be useful for patients with large body surface areas affected, and those with unstable or progressive disease, he added.

Areas for additional research include combination therapy with ruxolitinib and phototherapy, and an anti-IL 15 therapy in the pipeline has the potential to drive vitiligo into remission, Dr. Rosmarin said. In a study known as REVEAL that is still recruiting patients, researchers will test the efficacy of an IL-15 inhibitor known as AMG 714 to induce facial repigmentation in adults with vitiligo.

Dr. Rosmarin disclosed ties with AbbVie, Abcuro, AltruBio, Amgen, Arena Pharmaceuticals, Boehringer Ingelheim, Bristol Myers Squibb Company, Celgene, Concert Pharmaceuticals, CSL Behring, Dermavant, Dermira, Eli Lilly, Galderma, Incyte, Janssen, Kyowa Kirin, Merck, Novartis, Pfizer, Regeneron, Revolo, Sanofi, Sun, UCB, and Viela Bio.

MedscapeLive and this news organization are owned by the same parent company.

Topical minoxidil is widely used to treat hair loss, but new findings suggest that a combination of oral and topical minoxidil could be effective for women with breast cancer who have experienced alopecia from anticancer treatment.

In a retrospective cohort study of women with breast cancer and anticancer therapy–induced alopecia, researchers found that combining low-dose oral minoxidil (LDOM) and topical minoxidil achieved better results than topical minoxidil alone and that the treatment was well tolerated. A total of 5 of the 37 patients (13.5%) in the combination therapy group achieved a complete response, defined as an improvement of alopecia severity from grade 2 to grade 1, compared with none of the 19 patients in the topical therapy–only group.

In contrast, none of the patients in the combination group experienced worsening of alopecia, compared with two (10.5%) in the topical monotherapy group.

The study was published online in the Journal of the American Academy of Dermatology. Topical minoxidil is approved by the Food and Drug Administration to treat androgenetic alopecia. Oral minoxidil is not approved for treating hair loss but has been receiving increased attention as an adjunctive therapy for hair loss, particularly for women. Oral minoxidil is approved for treating hypertension but at much higher doses.

An increasing number of studies have been conducted on the use of oral minoxidil for the treatment of female pattern hair loss, dating back to a pilot study in 2017, with promising results. The findings suggest that LDOM might be more effective than topical therapy, well tolerated, and more convenient for individuals to take.

Hypothesis generating

In a comment, Kai Johnson, MD, a medical oncologist who specializes in treating patients with breast cancer at the Ohio State University Comprehensive Cancer Center – Arthur G. James Cancer Hospital and Richard J. Solove Research Institute, Columbus, noted that the study, like most small-scale retrospective studies, is hypothesis generating. However, “I’d be hesitant to broadly recommend this practice of dual therapy – oral and topical minoxidil together – until we see a placebo-controlled prospective study performed demonstrating clinically meaningful benefits for patients.”

Another factor is the study endpoints. “While there was a statistically significant benefit documented with dual therapy in this study, it’s important to have study endpoints that are more patient oriented,” Dr. Johnson said. The most important endpoint for patients would be improvements “in the actual alopecia grade, which did occur in 5 of the 37 of dual-therapy patients, versus 0 topical minoxidil patients.”

George Cotsarelis, MD, chair of the department of dermatology and professor of dermatology at the University of Pennsylvania, Philadelphia, also weighed in. He questioned whether adding the topical therapy to oral minoxidil actually improved the results. “What was missing was a study arm that used the oral alone,” he said in an interview. “So we don’t know how effective the oral therapy would be by itself and if combining it with the topical is really adding anything.”

Oral minoxidil as a treatment for hair loss is gaining traction, and it’s clear that it is effective. However, the risk of side effects is higher, he said. “The risk isn’t that high with the low dose, but it can grow hair on places other than the scalp, and that can be disconcerting.” In this study, two women who took the oral drug reported edema, and one reported headache and dizziness. Hypertrichosis was reported by five patients who received the combination.
 

Study details

In the study, Jeewoo Kang, MD, and colleagues from the Seoul National University evaluated the efficacy of LDOM in 100 patients with breast cancer who had been diagnosed with persistent chemotherapy-induced alopecia (pCIA) and endocrine therapy–induced alopecia (EIA) at a dermatology clinic.

They conducted an analysis of medical records, standardized clinical photographs, and trichoscopic images to evaluate the alopecia pattern, severity, treatment response, and posttreatment changes in vertex hair density and thickness.

Compared with those with EIA alone, patients with pCIA were significantly more likely to have diffuse alopecia (P < .001), and they were more likely to have more severe alopecia, although this difference was not significant (P = .058). Outcomes were evaluated for 56 patients who were treated with minoxidil (19 with topical minoxidil alone and 37 with both LDOM and topical minoxidil) and for whom clinical and trichoscopic photos were available at baseline and at the last follow-up (all patients were scheduled for follow-up at 3-month intervals).

The results showed that those treated with 1.25-5.0 mg/d of oral minoxidil and 5% topical minoxidil solution once a day had better responses (P = .002) and a higher percentage increase in hair density from baseline (P = .003), compared with those who received topical minoxidil monotherapy.

However, changes in hair thickness after treatment were not significantly different between the two groups (P = .540).

In addition to the five (13.5%) cases of hypertrichosis, two cases of edema (5.4%), and one case of headache/dizziness (2.7%) among those who received the combination, there was also one report of palpitations (2.7%). Palpitations were reported in one patient (5%) who received topical monotherapy, the only adverse event reported in this group.

Dr. Johnson noted that, at his institution, a dermatologist is conducting a clinical trial with oncology patients post chemotherapy and endocrine therapy. “She is looking at a similar question, although she is comparing oral minoxidil to topical minoxidil directly rather than in combination.” There is also an active clinical trial at Northwestern University, Chicago, of LDOM alone for patients with chemotherapy-induced alopecia.

“So there is a lot of momentum surrounding this concept, and I feel we will continue to see it come up as a possible treatment option, but more data are needed at this time before it can become standard of care,” Dr. Johnson added.

No funding for the study was reported. The authors disclosed no relevant financial relationships.

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

Topical minoxidil is widely used to treat hair loss, but new findings suggest that a combination of oral and topical minoxidil could be effective for women with breast cancer who have experienced alopecia from anticancer treatment.

In a retrospective cohort study of women with breast cancer and anticancer therapy–induced alopecia, researchers found that combining low-dose oral minoxidil (LDOM) and topical minoxidil achieved better results than topical minoxidil alone and that the treatment was well tolerated. A total of 5 of the 37 patients (13.5%) in the combination therapy group achieved a complete response, defined as an improvement of alopecia severity from grade 2 to grade 1, compared with none of the 19 patients in the topical therapy–only group.

In contrast, none of the patients in the combination group experienced worsening of alopecia, compared with two (10.5%) in the topical monotherapy group.

The study was published online in the Journal of the American Academy of Dermatology. Topical minoxidil is approved by the Food and Drug Administration to treat androgenetic alopecia. Oral minoxidil is not approved for treating hair loss but has been receiving increased attention as an adjunctive therapy for hair loss, particularly for women. Oral minoxidil is approved for treating hypertension but at much higher doses.

An increasing number of studies have been conducted on the use of oral minoxidil for the treatment of female pattern hair loss, dating back to a pilot study in 2017, with promising results. The findings suggest that LDOM might be more effective than topical therapy, well tolerated, and more convenient for individuals to take.

Hypothesis generating

In a comment, Kai Johnson, MD, a medical oncologist who specializes in treating patients with breast cancer at the Ohio State University Comprehensive Cancer Center – Arthur G. James Cancer Hospital and Richard J. Solove Research Institute, Columbus, noted that the study, like most small-scale retrospective studies, is hypothesis generating. However, “I’d be hesitant to broadly recommend this practice of dual therapy – oral and topical minoxidil together – until we see a placebo-controlled prospective study performed demonstrating clinically meaningful benefits for patients.”

Another factor is the study endpoints. “While there was a statistically significant benefit documented with dual therapy in this study, it’s important to have study endpoints that are more patient oriented,” Dr. Johnson said. The most important endpoint for patients would be improvements “in the actual alopecia grade, which did occur in 5 of the 37 of dual-therapy patients, versus 0 topical minoxidil patients.”

George Cotsarelis, MD, chair of the department of dermatology and professor of dermatology at the University of Pennsylvania, Philadelphia, also weighed in. He questioned whether adding the topical therapy to oral minoxidil actually improved the results. “What was missing was a study arm that used the oral alone,” he said in an interview. “So we don’t know how effective the oral therapy would be by itself and if combining it with the topical is really adding anything.”

Oral minoxidil as a treatment for hair loss is gaining traction, and it’s clear that it is effective. However, the risk of side effects is higher, he said. “The risk isn’t that high with the low dose, but it can grow hair on places other than the scalp, and that can be disconcerting.” In this study, two women who took the oral drug reported edema, and one reported headache and dizziness. Hypertrichosis was reported by five patients who received the combination.
 

Study details

In the study, Jeewoo Kang, MD, and colleagues from the Seoul National University evaluated the efficacy of LDOM in 100 patients with breast cancer who had been diagnosed with persistent chemotherapy-induced alopecia (pCIA) and endocrine therapy–induced alopecia (EIA) at a dermatology clinic.

They conducted an analysis of medical records, standardized clinical photographs, and trichoscopic images to evaluate the alopecia pattern, severity, treatment response, and posttreatment changes in vertex hair density and thickness.

Compared with those with EIA alone, patients with pCIA were significantly more likely to have diffuse alopecia (P < .001), and they were more likely to have more severe alopecia, although this difference was not significant (P = .058). Outcomes were evaluated for 56 patients who were treated with minoxidil (19 with topical minoxidil alone and 37 with both LDOM and topical minoxidil) and for whom clinical and trichoscopic photos were available at baseline and at the last follow-up (all patients were scheduled for follow-up at 3-month intervals).

The results showed that those treated with 1.25-5.0 mg/d of oral minoxidil and 5% topical minoxidil solution once a day had better responses (P = .002) and a higher percentage increase in hair density from baseline (P = .003), compared with those who received topical minoxidil monotherapy.

However, changes in hair thickness after treatment were not significantly different between the two groups (P = .540).

In addition to the five (13.5%) cases of hypertrichosis, two cases of edema (5.4%), and one case of headache/dizziness (2.7%) among those who received the combination, there was also one report of palpitations (2.7%). Palpitations were reported in one patient (5%) who received topical monotherapy, the only adverse event reported in this group.

Dr. Johnson noted that, at his institution, a dermatologist is conducting a clinical trial with oncology patients post chemotherapy and endocrine therapy. “She is looking at a similar question, although she is comparing oral minoxidil to topical minoxidil directly rather than in combination.” There is also an active clinical trial at Northwestern University, Chicago, of LDOM alone for patients with chemotherapy-induced alopecia.

“So there is a lot of momentum surrounding this concept, and I feel we will continue to see it come up as a possible treatment option, but more data are needed at this time before it can become standard of care,” Dr. Johnson added.

No funding for the study was reported. The authors disclosed no relevant financial relationships.

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

Topical minoxidil is widely used to treat hair loss, but new findings suggest that a combination of oral and topical minoxidil could be effective for women with breast cancer who have experienced alopecia from anticancer treatment.

In a retrospective cohort study of women with breast cancer and anticancer therapy–induced alopecia, researchers found that combining low-dose oral minoxidil (LDOM) and topical minoxidil achieved better results than topical minoxidil alone and that the treatment was well tolerated. A total of 5 of the 37 patients (13.5%) in the combination therapy group achieved a complete response, defined as an improvement of alopecia severity from grade 2 to grade 1, compared with none of the 19 patients in the topical therapy–only group.

In contrast, none of the patients in the combination group experienced worsening of alopecia, compared with two (10.5%) in the topical monotherapy group.

The study was published online in the Journal of the American Academy of Dermatology. Topical minoxidil is approved by the Food and Drug Administration to treat androgenetic alopecia. Oral minoxidil is not approved for treating hair loss but has been receiving increased attention as an adjunctive therapy for hair loss, particularly for women. Oral minoxidil is approved for treating hypertension but at much higher doses.

An increasing number of studies have been conducted on the use of oral minoxidil for the treatment of female pattern hair loss, dating back to a pilot study in 2017, with promising results. The findings suggest that LDOM might be more effective than topical therapy, well tolerated, and more convenient for individuals to take.

Hypothesis generating

In a comment, Kai Johnson, MD, a medical oncologist who specializes in treating patients with breast cancer at the Ohio State University Comprehensive Cancer Center – Arthur G. James Cancer Hospital and Richard J. Solove Research Institute, Columbus, noted that the study, like most small-scale retrospective studies, is hypothesis generating. However, “I’d be hesitant to broadly recommend this practice of dual therapy – oral and topical minoxidil together – until we see a placebo-controlled prospective study performed demonstrating clinically meaningful benefits for patients.”

Another factor is the study endpoints. “While there was a statistically significant benefit documented with dual therapy in this study, it’s important to have study endpoints that are more patient oriented,” Dr. Johnson said. The most important endpoint for patients would be improvements “in the actual alopecia grade, which did occur in 5 of the 37 of dual-therapy patients, versus 0 topical minoxidil patients.”

George Cotsarelis, MD, chair of the department of dermatology and professor of dermatology at the University of Pennsylvania, Philadelphia, also weighed in. He questioned whether adding the topical therapy to oral minoxidil actually improved the results. “What was missing was a study arm that used the oral alone,” he said in an interview. “So we don’t know how effective the oral therapy would be by itself and if combining it with the topical is really adding anything.”

Oral minoxidil as a treatment for hair loss is gaining traction, and it’s clear that it is effective. However, the risk of side effects is higher, he said. “The risk isn’t that high with the low dose, but it can grow hair on places other than the scalp, and that can be disconcerting.” In this study, two women who took the oral drug reported edema, and one reported headache and dizziness. Hypertrichosis was reported by five patients who received the combination.
 

Study details

In the study, Jeewoo Kang, MD, and colleagues from the Seoul National University evaluated the efficacy of LDOM in 100 patients with breast cancer who had been diagnosed with persistent chemotherapy-induced alopecia (pCIA) and endocrine therapy–induced alopecia (EIA) at a dermatology clinic.

They conducted an analysis of medical records, standardized clinical photographs, and trichoscopic images to evaluate the alopecia pattern, severity, treatment response, and posttreatment changes in vertex hair density and thickness.

Compared with those with EIA alone, patients with pCIA were significantly more likely to have diffuse alopecia (P < .001), and they were more likely to have more severe alopecia, although this difference was not significant (P = .058). Outcomes were evaluated for 56 patients who were treated with minoxidil (19 with topical minoxidil alone and 37 with both LDOM and topical minoxidil) and for whom clinical and trichoscopic photos were available at baseline and at the last follow-up (all patients were scheduled for follow-up at 3-month intervals).

The results showed that those treated with 1.25-5.0 mg/d of oral minoxidil and 5% topical minoxidil solution once a day had better responses (P = .002) and a higher percentage increase in hair density from baseline (P = .003), compared with those who received topical minoxidil monotherapy.

However, changes in hair thickness after treatment were not significantly different between the two groups (P = .540).

In addition to the five (13.5%) cases of hypertrichosis, two cases of edema (5.4%), and one case of headache/dizziness (2.7%) among those who received the combination, there was also one report of palpitations (2.7%). Palpitations were reported in one patient (5%) who received topical monotherapy, the only adverse event reported in this group.

Dr. Johnson noted that, at his institution, a dermatologist is conducting a clinical trial with oncology patients post chemotherapy and endocrine therapy. “She is looking at a similar question, although she is comparing oral minoxidil to topical minoxidil directly rather than in combination.” There is also an active clinical trial at Northwestern University, Chicago, of LDOM alone for patients with chemotherapy-induced alopecia.

“So there is a lot of momentum surrounding this concept, and I feel we will continue to see it come up as a possible treatment option, but more data are needed at this time before it can become standard of care,” Dr. Johnson added.

No funding for the study was reported. The authors disclosed no relevant financial relationships.

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

Among patients with metastatic melanoma who undergo treatment with single or combination immune checkpoint inhibitors (ICIs) and who experience immune adverse events, overall survival is significantly longer, regardless of the need for hospitalization. Survival is further improved if the immunotherapy is continued after the adverse event develops, a new study confirms.

“In the largest clinical cohort to date, our data support a positive association with overall survival for patients who develop clinically significant immune-related adverse events while receiving combination immune checkpoint blockade, in keeping with other reported series,” the authors wrote.

The study was published online in JAMA Network Open.

Immune-related adverse events are common with these drugs. Severe events of grade 3 or higher occur in 59% of trial patients who receive combination ICI therapy.

The adverse events have increasingly been positively associated with survival. However, the effects for patients with metastatic melanoma, in particular, are less clear. There is little research on the effects in relation to combination therapy with ipilimumab and nivolumab, which is the standard of care for many patients with metastatic melanoma.

To investigate, Alexander S. Watson, MD, and colleagues evaluated data on 492 patients with metastatic melanoma who had been treated with one or more doses of an anti–programmed death 1 agent as single or combination immune checkpoint blockade in the multicenter Alberta Immunotherapy Database from August 2013 to May 2020.

Of these 492 patients, 198 patients (40%) developed immune-related adverse events. The mean age of the patients who developed adverse events was 61.8 years; of those who did not develop adverse events, the mean age was 65.5 years. Men made up 69.2% and 62.2%, respectively.

A total of 288 patients received pembrolizumab as their first ICI therapy, 80 received nivolumab, and 124 received combination blockade with ipilimumab-nivolumab.

Overall, with a median follow-up of 36.6 months, among patients who experienced clinically significant immune-related adverse events, defined as requiring systemic corticosteroids and/or a treatment delay, median overall survival was significantly improved, at 56.3 months, compared with 18.5 months among those who did not experience immune-related adverse events (P < .001).

In addition, among those who received combination ICI treatment, the median overall survival was 56.2 months for those who experienced adverse events versus 19.0 months for those who did not (P < .001).

There were no significant differences in overall survival between those who were and those who were not hospitalized for their immune-related adverse events (P = .53).

For patients who resumed their ICI therapy following the adverse events, overall survival was longer, compared with those who did not resume the therapy (median, 56.3 months vs. 31.5 months; P = .009).

The improvements in overall survival seen with immune-related adverse events remained consistent after adjustment in a multivariable analysis (hazard ratio for death, 0.382; P < .001).

There were no significant differences in the median number of cycles of ICIs between those with and those without the adverse events.

The risk of recurrence of immune-related adverse events following the reintroduction of therapy after initial events was a concern, so the improved overall survival among those patients is encouraging, although further investigation is needed, commented lead author Dr. Watson, from the department of oncology, University of Calgary (Alta.).

“It may be, for certain patients with immune-related adverse events, that continued immune-priming is safe and optimizes anticancer response,” he told this news organization. “However, in a retrospective analysis such as ours, selection bias can have an impact.”

“Confirming this finding and better identifying patients who may benefit from resumption will be an area for future investigation,” he said.  

Patients who developed immune-related adverse events were more likely to be younger than 50 years (21.8% vs. 13.9%), have normal albumin levels (86.4% vs. 74.8%), and have a more robust Eastern Cooperative Oncology Group status, which is consistent with other studies that have shown survival benefits among those who experience adverse events.

“We, and others, speculate this could be due to such groups having immune systems more ready to respond strongly to immunotherapy,” Dr. Watson explained.

After controlling for age and performance status in the multivariable analysis, however, “immune-related adverse events remained strongly associated with survival, potentially [indicating] that robust responses to immunotherapy lead to both cancer control and immune-related adverse events,” he said.

Overall, “we feel these findings will help clinicians in discussions with patients and in clinical decision-making after adverse events develop,” Dr. Watson said.

Dr. Watson has received personal fees from Apobiologix Canada.

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

Among patients with metastatic melanoma who undergo treatment with single or combination immune checkpoint inhibitors (ICIs) and who experience immune adverse events, overall survival is significantly longer, regardless of the need for hospitalization. Survival is further improved if the immunotherapy is continued after the adverse event develops, a new study confirms.

“In the largest clinical cohort to date, our data support a positive association with overall survival for patients who develop clinically significant immune-related adverse events while receiving combination immune checkpoint blockade, in keeping with other reported series,” the authors wrote.

The study was published online in JAMA Network Open.

Immune-related adverse events are common with these drugs. Severe events of grade 3 or higher occur in 59% of trial patients who receive combination ICI therapy.

The adverse events have increasingly been positively associated with survival. However, the effects for patients with metastatic melanoma, in particular, are less clear. There is little research on the effects in relation to combination therapy with ipilimumab and nivolumab, which is the standard of care for many patients with metastatic melanoma.

To investigate, Alexander S. Watson, MD, and colleagues evaluated data on 492 patients with metastatic melanoma who had been treated with one or more doses of an anti–programmed death 1 agent as single or combination immune checkpoint blockade in the multicenter Alberta Immunotherapy Database from August 2013 to May 2020.

Of these 492 patients, 198 patients (40%) developed immune-related adverse events. The mean age of the patients who developed adverse events was 61.8 years; of those who did not develop adverse events, the mean age was 65.5 years. Men made up 69.2% and 62.2%, respectively.

A total of 288 patients received pembrolizumab as their first ICI therapy, 80 received nivolumab, and 124 received combination blockade with ipilimumab-nivolumab.

Overall, with a median follow-up of 36.6 months, among patients who experienced clinically significant immune-related adverse events, defined as requiring systemic corticosteroids and/or a treatment delay, median overall survival was significantly improved, at 56.3 months, compared with 18.5 months among those who did not experience immune-related adverse events (P < .001).

In addition, among those who received combination ICI treatment, the median overall survival was 56.2 months for those who experienced adverse events versus 19.0 months for those who did not (P < .001).

There were no significant differences in overall survival between those who were and those who were not hospitalized for their immune-related adverse events (P = .53).

For patients who resumed their ICI therapy following the adverse events, overall survival was longer, compared with those who did not resume the therapy (median, 56.3 months vs. 31.5 months; P = .009).

The improvements in overall survival seen with immune-related adverse events remained consistent after adjustment in a multivariable analysis (hazard ratio for death, 0.382; P < .001).

There were no significant differences in the median number of cycles of ICIs between those with and those without the adverse events.

The risk of recurrence of immune-related adverse events following the reintroduction of therapy after initial events was a concern, so the improved overall survival among those patients is encouraging, although further investigation is needed, commented lead author Dr. Watson, from the department of oncology, University of Calgary (Alta.).

“It may be, for certain patients with immune-related adverse events, that continued immune-priming is safe and optimizes anticancer response,” he told this news organization. “However, in a retrospective analysis such as ours, selection bias can have an impact.”

“Confirming this finding and better identifying patients who may benefit from resumption will be an area for future investigation,” he said.  

Patients who developed immune-related adverse events were more likely to be younger than 50 years (21.8% vs. 13.9%), have normal albumin levels (86.4% vs. 74.8%), and have a more robust Eastern Cooperative Oncology Group status, which is consistent with other studies that have shown survival benefits among those who experience adverse events.

“We, and others, speculate this could be due to such groups having immune systems more ready to respond strongly to immunotherapy,” Dr. Watson explained.

After controlling for age and performance status in the multivariable analysis, however, “immune-related adverse events remained strongly associated with survival, potentially [indicating] that robust responses to immunotherapy lead to both cancer control and immune-related adverse events,” he said.

Overall, “we feel these findings will help clinicians in discussions with patients and in clinical decision-making after adverse events develop,” Dr. Watson said.

Dr. Watson has received personal fees from Apobiologix Canada.

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

Among patients with metastatic melanoma who undergo treatment with single or combination immune checkpoint inhibitors (ICIs) and who experience immune adverse events, overall survival is significantly longer, regardless of the need for hospitalization. Survival is further improved if the immunotherapy is continued after the adverse event develops, a new study confirms.

“In the largest clinical cohort to date, our data support a positive association with overall survival for patients who develop clinically significant immune-related adverse events while receiving combination immune checkpoint blockade, in keeping with other reported series,” the authors wrote.

The study was published online in JAMA Network Open.

Immune-related adverse events are common with these drugs. Severe events of grade 3 or higher occur in 59% of trial patients who receive combination ICI therapy.

The adverse events have increasingly been positively associated with survival. However, the effects for patients with metastatic melanoma, in particular, are less clear. There is little research on the effects in relation to combination therapy with ipilimumab and nivolumab, which is the standard of care for many patients with metastatic melanoma.

To investigate, Alexander S. Watson, MD, and colleagues evaluated data on 492 patients with metastatic melanoma who had been treated with one or more doses of an anti–programmed death 1 agent as single or combination immune checkpoint blockade in the multicenter Alberta Immunotherapy Database from August 2013 to May 2020.

Of these 492 patients, 198 patients (40%) developed immune-related adverse events. The mean age of the patients who developed adverse events was 61.8 years; of those who did not develop adverse events, the mean age was 65.5 years. Men made up 69.2% and 62.2%, respectively.

A total of 288 patients received pembrolizumab as their first ICI therapy, 80 received nivolumab, and 124 received combination blockade with ipilimumab-nivolumab.

Overall, with a median follow-up of 36.6 months, among patients who experienced clinically significant immune-related adverse events, defined as requiring systemic corticosteroids and/or a treatment delay, median overall survival was significantly improved, at 56.3 months, compared with 18.5 months among those who did not experience immune-related adverse events (P < .001).

In addition, among those who received combination ICI treatment, the median overall survival was 56.2 months for those who experienced adverse events versus 19.0 months for those who did not (P < .001).

There were no significant differences in overall survival between those who were and those who were not hospitalized for their immune-related adverse events (P = .53).

For patients who resumed their ICI therapy following the adverse events, overall survival was longer, compared with those who did not resume the therapy (median, 56.3 months vs. 31.5 months; P = .009).

The improvements in overall survival seen with immune-related adverse events remained consistent after adjustment in a multivariable analysis (hazard ratio for death, 0.382; P < .001).

There were no significant differences in the median number of cycles of ICIs between those with and those without the adverse events.

The risk of recurrence of immune-related adverse events following the reintroduction of therapy after initial events was a concern, so the improved overall survival among those patients is encouraging, although further investigation is needed, commented lead author Dr. Watson, from the department of oncology, University of Calgary (Alta.).

“It may be, for certain patients with immune-related adverse events, that continued immune-priming is safe and optimizes anticancer response,” he told this news organization. “However, in a retrospective analysis such as ours, selection bias can have an impact.”

“Confirming this finding and better identifying patients who may benefit from resumption will be an area for future investigation,” he said.  

Patients who developed immune-related adverse events were more likely to be younger than 50 years (21.8% vs. 13.9%), have normal albumin levels (86.4% vs. 74.8%), and have a more robust Eastern Cooperative Oncology Group status, which is consistent with other studies that have shown survival benefits among those who experience adverse events.

“We, and others, speculate this could be due to such groups having immune systems more ready to respond strongly to immunotherapy,” Dr. Watson explained.

After controlling for age and performance status in the multivariable analysis, however, “immune-related adverse events remained strongly associated with survival, potentially [indicating] that robust responses to immunotherapy lead to both cancer control and immune-related adverse events,” he said.

Overall, “we feel these findings will help clinicians in discussions with patients and in clinical decision-making after adverse events develop,” Dr. Watson said.

Dr. Watson has received personal fees from Apobiologix Canada.

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