Pigmentation Disorders

The Diagnosis: Phacomatosis Cesioflammea  

Phacomatosis pigmentovascularis (PPV) encompasses a group of diseases that have a vascular nevus coupled with a pigmented nevus.¹ It is divided into 5 types: Type I is defined by the presence of a vascular malformation and epidermal nevus; type II by a vascular malformation and dermal melanosis with or without nevus anemicus; type III by a vascular malformation and nevus spilus with or without nevus anemicus; type IV by a vascular malformation, dermal melanosis, and nevus spilus with or without nevus anemicus; and type V as cutis marmorata telangiectatica congenita and dermal melanosis.¹  

Happle² proposed a descriptive classification system in 2005 that eliminated type I PPV because neither linear epidermal nevus nor Becker nevus are derived from pigmentary cells. An appended "a" denotes a subtype with isolated cutaneous findings, while "b" is associated with extracutaneous manifestations. Phacomatosis cesioflammea (type IIa/b) refers to blue-hued dermal melanocytosis and nevus flammeus. Phacomatosis spilorosea (type IIIa/b) refers to nevus spilus and rose-colored nevus flammeus. Phacomatosis cesiomarmorata (type Va/b) refers to dermal melanocytosis and cutis marmorata telangiectasia congenita. The last group (type IVa/b) is unclassifiable phacomatosis pigmentovascularis.^2,3  

Phacomatosis pigmentovascularis can be isolated to the skin or have associated extracutaneous findings, including ocular melanocytosis, seizures, or cognitive delay due to intracerebral vascular malformations. Patients also can develop limb and soft-tissue overgrowth.⁴ Phacomatosis pigmentovascularis has been found to be associated with mutations in the GNA11 and GNAQ genes. The theory behind PPV is twin spotting, resulting from a somatic mutation that leads to mosaic proliferation of 2 different cell lines.⁵ Phacomatosis pigmentovascularis can occur in isolation or can demonstrate the phenotype of Sturge-Weber syndrome or Klippel-Trenaunay syndrome. In Sturge-Weber syndrome, capillary malformations involve the face and underlying leptomeninges and cerebral cortex. Glaucoma and epilepsy also may be present. In Klippel-Trenaunay syndrome, capillary malformations involve the extremities (usually the legs) in association with varicose veins, soft-tissue hypertrophy, and skeletal overgrowth.^6-9 Tuberous sclerosis is an autosomal-dominant neurocutaneous disease in which patients develop hamartomas throughout the body, including the brain, skin, eyes, kidneys, heart, and lungs. Cutaneous manifestations include facial angiofibromas, ungual fibromas, hypomelanotic macules (ash leaf spots, confetti-like lesions), shagreen patches or connective tissue hamartomas, and fibrous plaques on the forehead. Tuberous sclerosis does not include vascular malformations.¹⁰  

Our patient was diagnosed with PPV type IIb, or phacomatosis cesioflammea. He had a large port-wine stain involving the right upper arm, back (Figure, A), and chest (Figure, B) with involvement of the bilateral conjunctivae (Figure, C). Our case is unique because our patient did not have dermal melanocytosis, only ocular melanocytosis.  

Once underlying neurologic and vascular anomalies have been ruled out, port-wine stains can be treated cosmetically. Pulsed dye laser is the gold standard therapy for capillary malformations, especially when instituted early. Follow-up with ophthalmology is advised to monitor ocular involvement. Shields et al¹¹ suggested dilated fundoscopy for patients with port-wine stains because choroidal pigmentation often is the only ocular change seen. Ocular melanocytosis can progress to pigmented glaucoma or choroidal melanoma. 

The Diagnosis: Phacomatosis Cesioflammea  

Phacomatosis pigmentovascularis (PPV) encompasses a group of diseases that have a vascular nevus coupled with a pigmented nevus.¹ It is divided into 5 types: Type I is defined by the presence of a vascular malformation and epidermal nevus; type II by a vascular malformation and dermal melanosis with or without nevus anemicus; type III by a vascular malformation and nevus spilus with or without nevus anemicus; type IV by a vascular malformation, dermal melanosis, and nevus spilus with or without nevus anemicus; and type V as cutis marmorata telangiectatica congenita and dermal melanosis.¹  

Happle² proposed a descriptive classification system in 2005 that eliminated type I PPV because neither linear epidermal nevus nor Becker nevus are derived from pigmentary cells. An appended "a" denotes a subtype with isolated cutaneous findings, while "b" is associated with extracutaneous manifestations. Phacomatosis cesioflammea (type IIa/b) refers to blue-hued dermal melanocytosis and nevus flammeus. Phacomatosis spilorosea (type IIIa/b) refers to nevus spilus and rose-colored nevus flammeus. Phacomatosis cesiomarmorata (type Va/b) refers to dermal melanocytosis and cutis marmorata telangiectasia congenita. The last group (type IVa/b) is unclassifiable phacomatosis pigmentovascularis.^2,3  

Phacomatosis pigmentovascularis can be isolated to the skin or have associated extracutaneous findings, including ocular melanocytosis, seizures, or cognitive delay due to intracerebral vascular malformations. Patients also can develop limb and soft-tissue overgrowth.⁴ Phacomatosis pigmentovascularis has been found to be associated with mutations in the GNA11 and GNAQ genes. The theory behind PPV is twin spotting, resulting from a somatic mutation that leads to mosaic proliferation of 2 different cell lines.⁵ Phacomatosis pigmentovascularis can occur in isolation or can demonstrate the phenotype of Sturge-Weber syndrome or Klippel-Trenaunay syndrome. In Sturge-Weber syndrome, capillary malformations involve the face and underlying leptomeninges and cerebral cortex. Glaucoma and epilepsy also may be present. In Klippel-Trenaunay syndrome, capillary malformations involve the extremities (usually the legs) in association with varicose veins, soft-tissue hypertrophy, and skeletal overgrowth.^6-9 Tuberous sclerosis is an autosomal-dominant neurocutaneous disease in which patients develop hamartomas throughout the body, including the brain, skin, eyes, kidneys, heart, and lungs. Cutaneous manifestations include facial angiofibromas, ungual fibromas, hypomelanotic macules (ash leaf spots, confetti-like lesions), shagreen patches or connective tissue hamartomas, and fibrous plaques on the forehead. Tuberous sclerosis does not include vascular malformations.¹⁰  

Our patient was diagnosed with PPV type IIb, or phacomatosis cesioflammea. He had a large port-wine stain involving the right upper arm, back (Figure, A), and chest (Figure, B) with involvement of the bilateral conjunctivae (Figure, C). Our case is unique because our patient did not have dermal melanocytosis, only ocular melanocytosis.  

Once underlying neurologic and vascular anomalies have been ruled out, port-wine stains can be treated cosmetically. Pulsed dye laser is the gold standard therapy for capillary malformations, especially when instituted early. Follow-up with ophthalmology is advised to monitor ocular involvement. Shields et al¹¹ suggested dilated fundoscopy for patients with port-wine stains because choroidal pigmentation often is the only ocular change seen. Ocular melanocytosis can progress to pigmented glaucoma or choroidal melanoma. 

The Diagnosis: Phacomatosis Cesioflammea  

Phacomatosis pigmentovascularis (PPV) encompasses a group of diseases that have a vascular nevus coupled with a pigmented nevus.¹ It is divided into 5 types: Type I is defined by the presence of a vascular malformation and epidermal nevus; type II by a vascular malformation and dermal melanosis with or without nevus anemicus; type III by a vascular malformation and nevus spilus with or without nevus anemicus; type IV by a vascular malformation, dermal melanosis, and nevus spilus with or without nevus anemicus; and type V as cutis marmorata telangiectatica congenita and dermal melanosis.¹  

Happle² proposed a descriptive classification system in 2005 that eliminated type I PPV because neither linear epidermal nevus nor Becker nevus are derived from pigmentary cells. An appended "a" denotes a subtype with isolated cutaneous findings, while "b" is associated with extracutaneous manifestations. Phacomatosis cesioflammea (type IIa/b) refers to blue-hued dermal melanocytosis and nevus flammeus. Phacomatosis spilorosea (type IIIa/b) refers to nevus spilus and rose-colored nevus flammeus. Phacomatosis cesiomarmorata (type Va/b) refers to dermal melanocytosis and cutis marmorata telangiectasia congenita. The last group (type IVa/b) is unclassifiable phacomatosis pigmentovascularis.^2,3  

Phacomatosis pigmentovascularis can be isolated to the skin or have associated extracutaneous findings, including ocular melanocytosis, seizures, or cognitive delay due to intracerebral vascular malformations. Patients also can develop limb and soft-tissue overgrowth.⁴ Phacomatosis pigmentovascularis has been found to be associated with mutations in the GNA11 and GNAQ genes. The theory behind PPV is twin spotting, resulting from a somatic mutation that leads to mosaic proliferation of 2 different cell lines.⁵ Phacomatosis pigmentovascularis can occur in isolation or can demonstrate the phenotype of Sturge-Weber syndrome or Klippel-Trenaunay syndrome. In Sturge-Weber syndrome, capillary malformations involve the face and underlying leptomeninges and cerebral cortex. Glaucoma and epilepsy also may be present. In Klippel-Trenaunay syndrome, capillary malformations involve the extremities (usually the legs) in association with varicose veins, soft-tissue hypertrophy, and skeletal overgrowth.^6-9 Tuberous sclerosis is an autosomal-dominant neurocutaneous disease in which patients develop hamartomas throughout the body, including the brain, skin, eyes, kidneys, heart, and lungs. Cutaneous manifestations include facial angiofibromas, ungual fibromas, hypomelanotic macules (ash leaf spots, confetti-like lesions), shagreen patches or connective tissue hamartomas, and fibrous plaques on the forehead. Tuberous sclerosis does not include vascular malformations.¹⁰  

Our patient was diagnosed with PPV type IIb, or phacomatosis cesioflammea. He had a large port-wine stain involving the right upper arm, back (Figure, A), and chest (Figure, B) with involvement of the bilateral conjunctivae (Figure, C). Our case is unique because our patient did not have dermal melanocytosis, only ocular melanocytosis.  

Once underlying neurologic and vascular anomalies have been ruled out, port-wine stains can be treated cosmetically. Pulsed dye laser is the gold standard therapy for capillary malformations, especially when instituted early. Follow-up with ophthalmology is advised to monitor ocular involvement. Shields et al¹¹ suggested dilated fundoscopy for patients with port-wine stains because choroidal pigmentation often is the only ocular change seen. Ocular melanocytosis can progress to pigmented glaucoma or choroidal melanoma. 

NEW YORK – Progress in understanding the sequence of events that drives vitiligo is not only behind highly promising new options for treatment, but also might be leading to a strategy that will prevent the inevitable relapse that occurs after treatment is stopped, according to an update at the American Academy of Dermatology summer meeting.

MarijaRadovic/Getty Images

Recently, trial results with a Janus kinase (JAK) pathway inhibitor have shown promise for treatment of vitiligo, but the ultimate fix for this recurring autoimmune disease might be elimination of resident-memory T cells, according to John Harris, MD, PhD, of the department of dermatology at the University of Massachusetts, Worcester.

In a murine vitiligo model, targeting interleukin-15, a cytokine thought to be essential for maintaining memory T cells, produced rapid and durable repigmentation without apparent adverse effects in a series of studies sufficiently promising that clinical trials are now being actively planned, Dr. Harris said. The ongoing work to eliminate resident-memory T cells to prevent relapse of vitiligo comes at the end of other recent advances that have provided major insights into the pathophysiology of vitiligo.

As outlined by Dr. Harris, vitiligo involves an autoimmune sequence that includes up-regulation of interferon-gamma, activation of the JAK signaling pathway, and mobilization of the cytokine CXCl10, all of which are part of the sequence of events culminating in activation of T cells that attack the melanocyte. The process can be stopped when any of these events are targeted, according to the experimental studies. These findings have already been translated into new drug development.

“There are now three ongoing clinical trials with JAK inhibitors. This is a tremendous advance in a disease for which there have been no clinical trials for decades,” Dr. Harris said. He cited highly positive data with the JAK inhibitor ruxolitinib, which were reported just weeks earlier at the World Congress of Dermatology, to confirm that this principle of intervention is viable.

However, relapse after discontinuation of ruxolitinib, like other treatments for vitiligo, is high. The observation that relapses typically occur in the exact spot where skin lesions occurred previously created the framework of a new potential wave of advances, according to Dr. Harris, director of the Vitiligo Clinic and Research Center at the University of Massachusetts, Worcester.

These advances involve progress in understanding the role of resident-memory T cells in driving autoimmune disease relapse.

In principle, memory-resident T cells are left behind in order to stimulate a rapid immune response in the event of a recurrence of a virus or another pathogen. According to work performed in animal models of vitiligo, they also appear to play a critical role in reactivation of this autoimmune disease, Dr. Harris said.

This role was not surprising, but the potential breakthrough in vitiligo surrounds evidence that the cytokine IL-15 is essential to the creation and maintenance of these memory cells. Evidence suggests vitiligo in animal models does not recur in the absence of IL-15, making it a potential target for treatment.

Initially, there was concern that inhibition of IL-15 would have off-target effects, but this concern has diminished with antibodies designed to inhibit IL-15 signaling in the animal model.

“It turns out that autoreactive cells are much more dependent on the cytokine than other T cells,” he said.

In the animal model, repigmentation has occurred more rapidly with anti-IL-15 therapy than with any other treatment tested to date, but more importantly, these mice then appear to be protected from vitiligo recurrence for extended periods, Dr. Harris noted.

Studies conducted with human tissue have provided strong evidence that the same mechanisms are in play. There are now several approaches to blocking IL-15 signaling, including a monoclonal antibody targeted at the IL-15 receptor, in development. This latter approach is now the focus of a company formed by Dr. Harris.

It is not yet clear if one approach to the inhibition of IL-15 will be superior to another, but Dr. Harris is highly optimistic that this will be a viable approach to control of vitiligo. Noting that good results have been achieved in experimental models by skin injections, thereby avoiding systemic exposure, he is also optimistic that this approach will be well tolerated.

“Based on these data, we are expecting clinical trials soon,” he said.

Dr. Harris reported serving as a consultant and/or investigator for multiple pharmaceutical companies including Aclaris Therapeutics, Celgene, EMD Serono, Genzyme, Incyte, and Janssen Biotech.

NEW YORK – Progress in understanding the sequence of events that drives vitiligo is not only behind highly promising new options for treatment, but also might be leading to a strategy that will prevent the inevitable relapse that occurs after treatment is stopped, according to an update at the American Academy of Dermatology summer meeting.

MarijaRadovic/Getty Images

Recently, trial results with a Janus kinase (JAK) pathway inhibitor have shown promise for treatment of vitiligo, but the ultimate fix for this recurring autoimmune disease might be elimination of resident-memory T cells, according to John Harris, MD, PhD, of the department of dermatology at the University of Massachusetts, Worcester.

In a murine vitiligo model, targeting interleukin-15, a cytokine thought to be essential for maintaining memory T cells, produced rapid and durable repigmentation without apparent adverse effects in a series of studies sufficiently promising that clinical trials are now being actively planned, Dr. Harris said. The ongoing work to eliminate resident-memory T cells to prevent relapse of vitiligo comes at the end of other recent advances that have provided major insights into the pathophysiology of vitiligo.

As outlined by Dr. Harris, vitiligo involves an autoimmune sequence that includes up-regulation of interferon-gamma, activation of the JAK signaling pathway, and mobilization of the cytokine CXCl10, all of which are part of the sequence of events culminating in activation of T cells that attack the melanocyte. The process can be stopped when any of these events are targeted, according to the experimental studies. These findings have already been translated into new drug development.

“There are now three ongoing clinical trials with JAK inhibitors. This is a tremendous advance in a disease for which there have been no clinical trials for decades,” Dr. Harris said. He cited highly positive data with the JAK inhibitor ruxolitinib, which were reported just weeks earlier at the World Congress of Dermatology, to confirm that this principle of intervention is viable.

However, relapse after discontinuation of ruxolitinib, like other treatments for vitiligo, is high. The observation that relapses typically occur in the exact spot where skin lesions occurred previously created the framework of a new potential wave of advances, according to Dr. Harris, director of the Vitiligo Clinic and Research Center at the University of Massachusetts, Worcester.

These advances involve progress in understanding the role of resident-memory T cells in driving autoimmune disease relapse.

In principle, memory-resident T cells are left behind in order to stimulate a rapid immune response in the event of a recurrence of a virus or another pathogen. According to work performed in animal models of vitiligo, they also appear to play a critical role in reactivation of this autoimmune disease, Dr. Harris said.

This role was not surprising, but the potential breakthrough in vitiligo surrounds evidence that the cytokine IL-15 is essential to the creation and maintenance of these memory cells. Evidence suggests vitiligo in animal models does not recur in the absence of IL-15, making it a potential target for treatment.

Initially, there was concern that inhibition of IL-15 would have off-target effects, but this concern has diminished with antibodies designed to inhibit IL-15 signaling in the animal model.

“It turns out that autoreactive cells are much more dependent on the cytokine than other T cells,” he said.

In the animal model, repigmentation has occurred more rapidly with anti-IL-15 therapy than with any other treatment tested to date, but more importantly, these mice then appear to be protected from vitiligo recurrence for extended periods, Dr. Harris noted.

Studies conducted with human tissue have provided strong evidence that the same mechanisms are in play. There are now several approaches to blocking IL-15 signaling, including a monoclonal antibody targeted at the IL-15 receptor, in development. This latter approach is now the focus of a company formed by Dr. Harris.

It is not yet clear if one approach to the inhibition of IL-15 will be superior to another, but Dr. Harris is highly optimistic that this will be a viable approach to control of vitiligo. Noting that good results have been achieved in experimental models by skin injections, thereby avoiding systemic exposure, he is also optimistic that this approach will be well tolerated.

“Based on these data, we are expecting clinical trials soon,” he said.

Dr. Harris reported serving as a consultant and/or investigator for multiple pharmaceutical companies including Aclaris Therapeutics, Celgene, EMD Serono, Genzyme, Incyte, and Janssen Biotech.

NEW YORK – Progress in understanding the sequence of events that drives vitiligo is not only behind highly promising new options for treatment, but also might be leading to a strategy that will prevent the inevitable relapse that occurs after treatment is stopped, according to an update at the American Academy of Dermatology summer meeting.

MarijaRadovic/Getty Images

Recently, trial results with a Janus kinase (JAK) pathway inhibitor have shown promise for treatment of vitiligo, but the ultimate fix for this recurring autoimmune disease might be elimination of resident-memory T cells, according to John Harris, MD, PhD, of the department of dermatology at the University of Massachusetts, Worcester.

In a murine vitiligo model, targeting interleukin-15, a cytokine thought to be essential for maintaining memory T cells, produced rapid and durable repigmentation without apparent adverse effects in a series of studies sufficiently promising that clinical trials are now being actively planned, Dr. Harris said. The ongoing work to eliminate resident-memory T cells to prevent relapse of vitiligo comes at the end of other recent advances that have provided major insights into the pathophysiology of vitiligo.

As outlined by Dr. Harris, vitiligo involves an autoimmune sequence that includes up-regulation of interferon-gamma, activation of the JAK signaling pathway, and mobilization of the cytokine CXCl10, all of which are part of the sequence of events culminating in activation of T cells that attack the melanocyte. The process can be stopped when any of these events are targeted, according to the experimental studies. These findings have already been translated into new drug development.

“There are now three ongoing clinical trials with JAK inhibitors. This is a tremendous advance in a disease for which there have been no clinical trials for decades,” Dr. Harris said. He cited highly positive data with the JAK inhibitor ruxolitinib, which were reported just weeks earlier at the World Congress of Dermatology, to confirm that this principle of intervention is viable.

However, relapse after discontinuation of ruxolitinib, like other treatments for vitiligo, is high. The observation that relapses typically occur in the exact spot where skin lesions occurred previously created the framework of a new potential wave of advances, according to Dr. Harris, director of the Vitiligo Clinic and Research Center at the University of Massachusetts, Worcester.

These advances involve progress in understanding the role of resident-memory T cells in driving autoimmune disease relapse.

In principle, memory-resident T cells are left behind in order to stimulate a rapid immune response in the event of a recurrence of a virus or another pathogen. According to work performed in animal models of vitiligo, they also appear to play a critical role in reactivation of this autoimmune disease, Dr. Harris said.

This role was not surprising, but the potential breakthrough in vitiligo surrounds evidence that the cytokine IL-15 is essential to the creation and maintenance of these memory cells. Evidence suggests vitiligo in animal models does not recur in the absence of IL-15, making it a potential target for treatment.

Initially, there was concern that inhibition of IL-15 would have off-target effects, but this concern has diminished with antibodies designed to inhibit IL-15 signaling in the animal model.

“It turns out that autoreactive cells are much more dependent on the cytokine than other T cells,” he said.

In the animal model, repigmentation has occurred more rapidly with anti-IL-15 therapy than with any other treatment tested to date, but more importantly, these mice then appear to be protected from vitiligo recurrence for extended periods, Dr. Harris noted.

Studies conducted with human tissue have provided strong evidence that the same mechanisms are in play. There are now several approaches to blocking IL-15 signaling, including a monoclonal antibody targeted at the IL-15 receptor, in development. This latter approach is now the focus of a company formed by Dr. Harris.

It is not yet clear if one approach to the inhibition of IL-15 will be superior to another, but Dr. Harris is highly optimistic that this will be a viable approach to control of vitiligo. Noting that good results have been achieved in experimental models by skin injections, thereby avoiding systemic exposure, he is also optimistic that this approach will be well tolerated.

“Based on these data, we are expecting clinical trials soon,” he said.

Dr. Harris reported serving as a consultant and/or investigator for multiple pharmaceutical companies including Aclaris Therapeutics, Celgene, EMD Serono, Genzyme, Incyte, and Janssen Biotech.

To the Editor:

Long, dark, and thick eyelashes have been a focal point of society’s perception of beauty for thousands of years,¹ and the use of makeup products such as mascaras, eyeliners, and eye shadows has further increased the perception of attractiveness of the eyes.² Many eyelash enhancement methods have been developed or in some instances have been serendipitously discovered. Bimatoprost ophthalmic solution 0.03% originally was developed as an eye drop that was approved by the US Food and Drug Association (FDA) in 2001 for the reduction of elevated intraocular pressure in patients with open-angle glaucoma or ocular hypertension. An unexpected side effect of this product was eyelash hypertrichosis.^3,4 As a result, the FDA approved bimatoprost ophthalmic solution 0.03% as an eyelash solution with an eyelid applicator for treatment of eyelash hypotrichosis in 2008.⁵

Because all follicular development occurs during embryogenesis, the number of eyelash follicles does not increase over time.⁶ Bitmatoprost eyelash solution works by prolonging the anagen (growth) phase of the eyelashes and stimulating the transition from the telogen (dormant) phase to the anagen phase. It also has been shown to increase the hair bulb diameter of follicles undergoing the anagen phase, resulting in thicker eyelashes.⁷ Although many patients have enjoyed this unexpected indication, prostaglandin (PG) analogues such as bimatoprost and latanoprost have a well-documented history of ocular side effects when applied directly to the eye. The most common adverse reactions include eye pruritus, conjunctival hyperemia, and eyelid pigmentation.³ The product safety information indicates that eyelid pigmentation typically is reversible.^3,5 Iris pigmentation is perhaps the least desirable side effect of PG analogues and was first noted in latanoprost studies on primates.⁸ The underlying mechanism appears to be due to an increase in melanogenesis that results in an increase in melanin granules without concomitant proliferation of melanocytes, cellular atypia, or evidence of inflammatory reaction. Unfortunately, this pigmentation typically is permanent.^3,5,9

Studies have shown that iris hyperpigmentation can occur when bimatoprost eye drops are applied to the eyes for the treatment of glaucoma and ocular hypertension, but reports associated with bimatoprost eyelash solution are rare.^3,4,10 We report a case of iris hyperpigmentation following cosmetic use of bimatoprost eyelash solution.

An otherwise healthy 63-year-old woman presented to our clinic for an annual skin examination. She noted that she had worsening dark pigmentation of the bilateral irises. The patient did not have any personal or family history of melanoma or ocular nevi, and there were no associated symptoms of eye tearing, pruritus, burning, or discharge. No prior surgical procedures had been performed on or around the eyes, and the patient never used contact lenses. She had been intermittently using bimatoprost eyelash solution prescribed by an outside physician for approximately 3 years to enhance her eyelashes. Although she never applied the product directly into her eyes, she noted that she often was unmethodical in application of the product and that runoff from the product may have occasionally leaked into the eyes. Physical examination revealed bilateral blue irises with ink spot–like, grayish black patches encircling the bilateral pupils (Figure).

There have been several studies of iris hyperpigmentation with use of PG analogues in the treatment of glaucoma. In a phase 3 clinical trial of the safety and efficacy of latanoprost for treatment of ocular hypertension, it was noted that 24 (12%) of 198 patients experienced iris hyperpigmentation and that patients with heterogeneous pigmentation (ie, hazel irises and mixed coloring) were at an increased risk.¹¹ Other studies also have shown an increased risk of iris hyperpigmentation due to heterogeneous phenotype¹² as well as older age.¹³

Reports of bimatoprost eye drops used for treatment of glaucoma have shown a high incidence of iris hyperpigmentation with long-term use. A prospective study conducted in 2012 investigated the adverse events of bimatoprost eye drops in 52 Japanese patients with glaucoma or ocular hypertension. Clinical photographs of the irises, eyelids, and eyelashes were taken at baseline and after 6 months of treatment. It was noted that 50% (26/52) of participants experienced iris hyperpigmentation upon completion of treatment.¹⁰

In our patient, bimatoprost eyelash solution was applied to the top eyelid margins using an applicator; our patient did not use the eye drop formulation, which is directed for use in ocular hypertension or glaucoma. A PubMed search of articles indexed for MEDLINE using the terms bimatoprost and iris hyperpigmentation yielded no published peer-reviewed studies or case reports of iris hyperpigmentation caused by bimatoprost eyelash solution for treatment of eyelid hypotrichosis, which makes this case report novel. With that said, the package insert states iris hyperpigmentation as a side effect in the prescribing information for both a bimatoprost eye drop formulation used to treat ocular hypertension³ as well as a formulation for topical application on the eyelids/eyelashes.⁵ A 2014 retrospective review of long-term safety with bimatoprost eyelash solution for eyelash hypotrichosis reported 4 instances (0.7%) of documented adverse events after 12 months of use in 585 patients, including dry eye, eyelid erythema, ocular pruritus, and low ocular pressure. Iris hyperpigmentation was not reported.¹⁴

The method of bimatoprost application likely is a determining factor in the number of reported adverse events. Studies with similar treatment periods have demonstrated more adverse events associated with bimatoprost eye drops vs eyelash solution.^15,16 When bimatoprost is used in the eye drop formulation for treatment of glaucoma, iris hyperpigmentation has been estimated to occur in 1.5%⁴ to 50%⁹ of cases. To our knowledge, there are no documented cases when bimatoprost eyelash solution is applied with a dermal applicator for treatment of eyelash hypotrichosis.^15,17 These results may be explained using an ocular splash test. In one study using lissamine green dye, decreased delivery of bimatoprost eyelash solution with the dermal applicator was noted vs eye drop application. Additionally, it has been demonstrated that approximately 5% (based on weight) of a one-drop dose of bimatoprost eyelash solution applied to the dermal applicator is actually delivered to the patient.¹⁸ The rest of the solution remains on the applicator.

It is important that patients use bimatoprost eyelash solution as instructed in the prescribing information (eg, clean the face, remove makeup and contact lenses prior to applying the product). The eyelid should not be rinsed after application, which limits the possibility of the bimatoprost solution from contacting or pooling in the eye. One drop of bimatoprost eyelash solution should be applied to the applicator supplied by the manufacturer and distributed evenly along the skin of the upper eyelid margin at the base of the eyelashes. It is important to blot any excess solution runoff outside the upper eyelid margin.⁵ Of note, our patient admitted to not always doing this step, which may have contributed to her susceptibility to this rare side effect.

Prostaglandin analogues have been observed to cause iris hyperpigmentation when applied directly to the eye for use in the treatment of glaucoma.¹⁹ Theoretically, the same side-effect profile should apply in their use as a dermal application on the eyelids. For this reason, one manufacturer includes iris hyperpigmentation as an adverse side effect in the prescribing information.⁵ It is important for physicians who prescribe bimatoprost eyelash solution to inform patients of this rare yet possible side effect and to instruct patients on proper application to minimize hyperpigmentation.

Our literature review did not demonstrate previous cases of iris hyperpigmentation associated with bimatoprost eyelash solution. One study suggested that 2 patients experienced hypopigmentation; however, this was not clinically significant and was not consistent with the proposed iris pigmentation thought to be caused by bimatoprost eyelash solution.²⁰

Potential future applications and off-label uses of bimatoprost include treatment of eyelash hypotrichosis on the lower eyelid margin and eyebrow hypertrichosis, as well as androgenic alopecia, alopecia areata, chemotherapy-induced alopecia, vitiligo, and hypopigmented scarring.²¹ Currently, investigational studies are looking at bimatoprost ophthalmic solution 0.03% for chemotherapy-induced eyelash hypotrichosis with positive results.²² In the future, bimatoprost may be used for other off-label and possibly FDA-approved uses.

To the Editor:

Long, dark, and thick eyelashes have been a focal point of society’s perception of beauty for thousands of years,¹ and the use of makeup products such as mascaras, eyeliners, and eye shadows has further increased the perception of attractiveness of the eyes.² Many eyelash enhancement methods have been developed or in some instances have been serendipitously discovered. Bimatoprost ophthalmic solution 0.03% originally was developed as an eye drop that was approved by the US Food and Drug Association (FDA) in 2001 for the reduction of elevated intraocular pressure in patients with open-angle glaucoma or ocular hypertension. An unexpected side effect of this product was eyelash hypertrichosis.^3,4 As a result, the FDA approved bimatoprost ophthalmic solution 0.03% as an eyelash solution with an eyelid applicator for treatment of eyelash hypotrichosis in 2008.⁵

Because all follicular development occurs during embryogenesis, the number of eyelash follicles does not increase over time.⁶ Bitmatoprost eyelash solution works by prolonging the anagen (growth) phase of the eyelashes and stimulating the transition from the telogen (dormant) phase to the anagen phase. It also has been shown to increase the hair bulb diameter of follicles undergoing the anagen phase, resulting in thicker eyelashes.⁷ Although many patients have enjoyed this unexpected indication, prostaglandin (PG) analogues such as bimatoprost and latanoprost have a well-documented history of ocular side effects when applied directly to the eye. The most common adverse reactions include eye pruritus, conjunctival hyperemia, and eyelid pigmentation.³ The product safety information indicates that eyelid pigmentation typically is reversible.^3,5 Iris pigmentation is perhaps the least desirable side effect of PG analogues and was first noted in latanoprost studies on primates.⁸ The underlying mechanism appears to be due to an increase in melanogenesis that results in an increase in melanin granules without concomitant proliferation of melanocytes, cellular atypia, or evidence of inflammatory reaction. Unfortunately, this pigmentation typically is permanent.^3,5,9

Studies have shown that iris hyperpigmentation can occur when bimatoprost eye drops are applied to the eyes for the treatment of glaucoma and ocular hypertension, but reports associated with bimatoprost eyelash solution are rare.^3,4,10 We report a case of iris hyperpigmentation following cosmetic use of bimatoprost eyelash solution.

An otherwise healthy 63-year-old woman presented to our clinic for an annual skin examination. She noted that she had worsening dark pigmentation of the bilateral irises. The patient did not have any personal or family history of melanoma or ocular nevi, and there were no associated symptoms of eye tearing, pruritus, burning, or discharge. No prior surgical procedures had been performed on or around the eyes, and the patient never used contact lenses. She had been intermittently using bimatoprost eyelash solution prescribed by an outside physician for approximately 3 years to enhance her eyelashes. Although she never applied the product directly into her eyes, she noted that she often was unmethodical in application of the product and that runoff from the product may have occasionally leaked into the eyes. Physical examination revealed bilateral blue irises with ink spot–like, grayish black patches encircling the bilateral pupils (Figure).

There have been several studies of iris hyperpigmentation with use of PG analogues in the treatment of glaucoma. In a phase 3 clinical trial of the safety and efficacy of latanoprost for treatment of ocular hypertension, it was noted that 24 (12%) of 198 patients experienced iris hyperpigmentation and that patients with heterogeneous pigmentation (ie, hazel irises and mixed coloring) were at an increased risk.¹¹ Other studies also have shown an increased risk of iris hyperpigmentation due to heterogeneous phenotype¹² as well as older age.¹³

Reports of bimatoprost eye drops used for treatment of glaucoma have shown a high incidence of iris hyperpigmentation with long-term use. A prospective study conducted in 2012 investigated the adverse events of bimatoprost eye drops in 52 Japanese patients with glaucoma or ocular hypertension. Clinical photographs of the irises, eyelids, and eyelashes were taken at baseline and after 6 months of treatment. It was noted that 50% (26/52) of participants experienced iris hyperpigmentation upon completion of treatment.¹⁰

In our patient, bimatoprost eyelash solution was applied to the top eyelid margins using an applicator; our patient did not use the eye drop formulation, which is directed for use in ocular hypertension or glaucoma. A PubMed search of articles indexed for MEDLINE using the terms bimatoprost and iris hyperpigmentation yielded no published peer-reviewed studies or case reports of iris hyperpigmentation caused by bimatoprost eyelash solution for treatment of eyelid hypotrichosis, which makes this case report novel. With that said, the package insert states iris hyperpigmentation as a side effect in the prescribing information for both a bimatoprost eye drop formulation used to treat ocular hypertension³ as well as a formulation for topical application on the eyelids/eyelashes.⁵ A 2014 retrospective review of long-term safety with bimatoprost eyelash solution for eyelash hypotrichosis reported 4 instances (0.7%) of documented adverse events after 12 months of use in 585 patients, including dry eye, eyelid erythema, ocular pruritus, and low ocular pressure. Iris hyperpigmentation was not reported.¹⁴

The method of bimatoprost application likely is a determining factor in the number of reported adverse events. Studies with similar treatment periods have demonstrated more adverse events associated with bimatoprost eye drops vs eyelash solution.^15,16 When bimatoprost is used in the eye drop formulation for treatment of glaucoma, iris hyperpigmentation has been estimated to occur in 1.5%⁴ to 50%⁹ of cases. To our knowledge, there are no documented cases when bimatoprost eyelash solution is applied with a dermal applicator for treatment of eyelash hypotrichosis.^15,17 These results may be explained using an ocular splash test. In one study using lissamine green dye, decreased delivery of bimatoprost eyelash solution with the dermal applicator was noted vs eye drop application. Additionally, it has been demonstrated that approximately 5% (based on weight) of a one-drop dose of bimatoprost eyelash solution applied to the dermal applicator is actually delivered to the patient.¹⁸ The rest of the solution remains on the applicator.

It is important that patients use bimatoprost eyelash solution as instructed in the prescribing information (eg, clean the face, remove makeup and contact lenses prior to applying the product). The eyelid should not be rinsed after application, which limits the possibility of the bimatoprost solution from contacting or pooling in the eye. One drop of bimatoprost eyelash solution should be applied to the applicator supplied by the manufacturer and distributed evenly along the skin of the upper eyelid margin at the base of the eyelashes. It is important to blot any excess solution runoff outside the upper eyelid margin.⁵ Of note, our patient admitted to not always doing this step, which may have contributed to her susceptibility to this rare side effect.

Prostaglandin analogues have been observed to cause iris hyperpigmentation when applied directly to the eye for use in the treatment of glaucoma.¹⁹ Theoretically, the same side-effect profile should apply in their use as a dermal application on the eyelids. For this reason, one manufacturer includes iris hyperpigmentation as an adverse side effect in the prescribing information.⁵ It is important for physicians who prescribe bimatoprost eyelash solution to inform patients of this rare yet possible side effect and to instruct patients on proper application to minimize hyperpigmentation.

Our literature review did not demonstrate previous cases of iris hyperpigmentation associated with bimatoprost eyelash solution. One study suggested that 2 patients experienced hypopigmentation; however, this was not clinically significant and was not consistent with the proposed iris pigmentation thought to be caused by bimatoprost eyelash solution.²⁰

Potential future applications and off-label uses of bimatoprost include treatment of eyelash hypotrichosis on the lower eyelid margin and eyebrow hypertrichosis, as well as androgenic alopecia, alopecia areata, chemotherapy-induced alopecia, vitiligo, and hypopigmented scarring.²¹ Currently, investigational studies are looking at bimatoprost ophthalmic solution 0.03% for chemotherapy-induced eyelash hypotrichosis with positive results.²² In the future, bimatoprost may be used for other off-label and possibly FDA-approved uses.

To the Editor:

Long, dark, and thick eyelashes have been a focal point of society’s perception of beauty for thousands of years,¹ and the use of makeup products such as mascaras, eyeliners, and eye shadows has further increased the perception of attractiveness of the eyes.² Many eyelash enhancement methods have been developed or in some instances have been serendipitously discovered. Bimatoprost ophthalmic solution 0.03% originally was developed as an eye drop that was approved by the US Food and Drug Association (FDA) in 2001 for the reduction of elevated intraocular pressure in patients with open-angle glaucoma or ocular hypertension. An unexpected side effect of this product was eyelash hypertrichosis.^3,4 As a result, the FDA approved bimatoprost ophthalmic solution 0.03% as an eyelash solution with an eyelid applicator for treatment of eyelash hypotrichosis in 2008.⁵

Because all follicular development occurs during embryogenesis, the number of eyelash follicles does not increase over time.⁶ Bitmatoprost eyelash solution works by prolonging the anagen (growth) phase of the eyelashes and stimulating the transition from the telogen (dormant) phase to the anagen phase. It also has been shown to increase the hair bulb diameter of follicles undergoing the anagen phase, resulting in thicker eyelashes.⁷ Although many patients have enjoyed this unexpected indication, prostaglandin (PG) analogues such as bimatoprost and latanoprost have a well-documented history of ocular side effects when applied directly to the eye. The most common adverse reactions include eye pruritus, conjunctival hyperemia, and eyelid pigmentation.³ The product safety information indicates that eyelid pigmentation typically is reversible.^3,5 Iris pigmentation is perhaps the least desirable side effect of PG analogues and was first noted in latanoprost studies on primates.⁸ The underlying mechanism appears to be due to an increase in melanogenesis that results in an increase in melanin granules without concomitant proliferation of melanocytes, cellular atypia, or evidence of inflammatory reaction. Unfortunately, this pigmentation typically is permanent.^3,5,9

Studies have shown that iris hyperpigmentation can occur when bimatoprost eye drops are applied to the eyes for the treatment of glaucoma and ocular hypertension, but reports associated with bimatoprost eyelash solution are rare.^3,4,10 We report a case of iris hyperpigmentation following cosmetic use of bimatoprost eyelash solution.

An otherwise healthy 63-year-old woman presented to our clinic for an annual skin examination. She noted that she had worsening dark pigmentation of the bilateral irises. The patient did not have any personal or family history of melanoma or ocular nevi, and there were no associated symptoms of eye tearing, pruritus, burning, or discharge. No prior surgical procedures had been performed on or around the eyes, and the patient never used contact lenses. She had been intermittently using bimatoprost eyelash solution prescribed by an outside physician for approximately 3 years to enhance her eyelashes. Although she never applied the product directly into her eyes, she noted that she often was unmethodical in application of the product and that runoff from the product may have occasionally leaked into the eyes. Physical examination revealed bilateral blue irises with ink spot–like, grayish black patches encircling the bilateral pupils (Figure).

There have been several studies of iris hyperpigmentation with use of PG analogues in the treatment of glaucoma. In a phase 3 clinical trial of the safety and efficacy of latanoprost for treatment of ocular hypertension, it was noted that 24 (12%) of 198 patients experienced iris hyperpigmentation and that patients with heterogeneous pigmentation (ie, hazel irises and mixed coloring) were at an increased risk.¹¹ Other studies also have shown an increased risk of iris hyperpigmentation due to heterogeneous phenotype¹² as well as older age.¹³

Reports of bimatoprost eye drops used for treatment of glaucoma have shown a high incidence of iris hyperpigmentation with long-term use. A prospective study conducted in 2012 investigated the adverse events of bimatoprost eye drops in 52 Japanese patients with glaucoma or ocular hypertension. Clinical photographs of the irises, eyelids, and eyelashes were taken at baseline and after 6 months of treatment. It was noted that 50% (26/52) of participants experienced iris hyperpigmentation upon completion of treatment.¹⁰

In our patient, bimatoprost eyelash solution was applied to the top eyelid margins using an applicator; our patient did not use the eye drop formulation, which is directed for use in ocular hypertension or glaucoma. A PubMed search of articles indexed for MEDLINE using the terms bimatoprost and iris hyperpigmentation yielded no published peer-reviewed studies or case reports of iris hyperpigmentation caused by bimatoprost eyelash solution for treatment of eyelid hypotrichosis, which makes this case report novel. With that said, the package insert states iris hyperpigmentation as a side effect in the prescribing information for both a bimatoprost eye drop formulation used to treat ocular hypertension³ as well as a formulation for topical application on the eyelids/eyelashes.⁵ A 2014 retrospective review of long-term safety with bimatoprost eyelash solution for eyelash hypotrichosis reported 4 instances (0.7%) of documented adverse events after 12 months of use in 585 patients, including dry eye, eyelid erythema, ocular pruritus, and low ocular pressure. Iris hyperpigmentation was not reported.¹⁴

The method of bimatoprost application likely is a determining factor in the number of reported adverse events. Studies with similar treatment periods have demonstrated more adverse events associated with bimatoprost eye drops vs eyelash solution.^15,16 When bimatoprost is used in the eye drop formulation for treatment of glaucoma, iris hyperpigmentation has been estimated to occur in 1.5%⁴ to 50%⁹ of cases. To our knowledge, there are no documented cases when bimatoprost eyelash solution is applied with a dermal applicator for treatment of eyelash hypotrichosis.^15,17 These results may be explained using an ocular splash test. In one study using lissamine green dye, decreased delivery of bimatoprost eyelash solution with the dermal applicator was noted vs eye drop application. Additionally, it has been demonstrated that approximately 5% (based on weight) of a one-drop dose of bimatoprost eyelash solution applied to the dermal applicator is actually delivered to the patient.¹⁸ The rest of the solution remains on the applicator.

It is important that patients use bimatoprost eyelash solution as instructed in the prescribing information (eg, clean the face, remove makeup and contact lenses prior to applying the product). The eyelid should not be rinsed after application, which limits the possibility of the bimatoprost solution from contacting or pooling in the eye. One drop of bimatoprost eyelash solution should be applied to the applicator supplied by the manufacturer and distributed evenly along the skin of the upper eyelid margin at the base of the eyelashes. It is important to blot any excess solution runoff outside the upper eyelid margin.⁵ Of note, our patient admitted to not always doing this step, which may have contributed to her susceptibility to this rare side effect.

Prostaglandin analogues have been observed to cause iris hyperpigmentation when applied directly to the eye for use in the treatment of glaucoma.¹⁹ Theoretically, the same side-effect profile should apply in their use as a dermal application on the eyelids. For this reason, one manufacturer includes iris hyperpigmentation as an adverse side effect in the prescribing information.⁵ It is important for physicians who prescribe bimatoprost eyelash solution to inform patients of this rare yet possible side effect and to instruct patients on proper application to minimize hyperpigmentation.

Our literature review did not demonstrate previous cases of iris hyperpigmentation associated with bimatoprost eyelash solution. One study suggested that 2 patients experienced hypopigmentation; however, this was not clinically significant and was not consistent with the proposed iris pigmentation thought to be caused by bimatoprost eyelash solution.²⁰

Potential future applications and off-label uses of bimatoprost include treatment of eyelash hypotrichosis on the lower eyelid margin and eyebrow hypertrichosis, as well as androgenic alopecia, alopecia areata, chemotherapy-induced alopecia, vitiligo, and hypopigmented scarring.²¹ Currently, investigational studies are looking at bimatoprost ophthalmic solution 0.03% for chemotherapy-induced eyelash hypotrichosis with positive results.²² In the future, bimatoprost may be used for other off-label and possibly FDA-approved uses.

To the Editor:

Erlotinib is a small-molecule selective tyrosine kinase inhibitor that functions by blocking the intracellular portion of the epidermal growth factor receptor (EGFR)^1,2; EGFR normally is expressed in the basal layer of the epidermis, sweat glands, and hair follicles, and is overexpressed in some cancers.^1,3 Normal activation of EGFR leads to signal transduction through the mitogen-activated protein kinase (MAPK) signaling pathway, which stimulates cell survival and proliferation.^4,5 Erlotinib-induced inhibition of EGFR prevents tyrosine kinase phosphorylation and aims to decrease cell proliferation in these tumors.

Erlotinib is indicated as once-daily oral monotherapy for the treatment of advanced-stage non–small cell lung cancer (NSCLCA) and in combination with gemcitabine for treatment of advanced-stage pancreatic cancer.¹ A number of cutaneous side effects have been reported, including acneform eruption, xerosis, paronychia, and pruritus.⁶ Other tyrosine kinase inhibitors, which also decrease signal transduction through the MAPK pathway, have some overlapping side effects; among these are vemurafenib, a selective BRAF inhibitor, and sorafenib, a multikinase inhibitor.^7,8

A 70-year-old man with NSCLCA presented with eruptive nevi and darkening of existing nevi 3 months after starting monotherapy with erlotinib. Physical examination demonstrated the simultaneous appearance of scattered acneform papules and pustules; diffuse xerosis; and numerous dark brown to black nevi on the trunk, arms, and legs. Compared to prior clinical photographs taken in our office, darkening of existing medium brown nevi was noted, and new nevi developed in areas where no prior nevi had been visible (Figure 1).

A review of the patient’s treatment timeline revealed that all other chemotherapeutic medications had been discontinued a minimum of 5 weeks before starting erlotinib. A complete cutaneous examination performed in our office after completion of these chemotherapeutic agents and prior to initiation of erlotinib was unremarkable for abnormally dark or eruptive nevi.

Since starting erlotinib treatment, the patient underwent 10 biopsies of clinically suspicious dark nevi performed by a dermatologist in our office. Two of these were diagnosed as melanoma in situ and one as an atypical nevus. A temporal association of the darkening and eruptive nevi with erlotinib treatment was established; however, because erlotinib was essential to his NSCLCA treatment, he continued erlotinib with frequent complete cutaneous examinations.

A number of cutaneous side effects have been described during treatment with erlotinib, the most common being acneform eruption.⁶ The incidence and severity of acneform eruptions have been positively correlated to survival in patients with NSCLCA.^3,5,6 Other common side effects include xerosis, paronychia, and pruritus.^1,5,6 Less common side effects include periungual pyogenic granulomas and hair growth abnormalities.¹

Eruptive nevi previously were reported in a patient who was treated with erlotinib.¹ Other tyrosine kinase inhibitors that also decrease signal transduction through the MAPK pathway, including sorafenib and vemurafenib, have been reported to cause eruptive nevi. There are 7 reports of eruptive nevi with sorafenib and 5 reports with vemurafenib.^7-9 Development of nevi were noted within a few months of initiating treatment with these medications.⁷

A PubMed search of articles indexed for MEDLINE using the terms erlotinib and melanoma and erlotinib and nevi yielded no prior reports of darkening of existing nevi or the development of melanoma during treatment with erlotinib. However, vemurafenib has been reported to cause dysplastic nevi, melanomas, and darkening of existing nevi, in addition to eruptive nevi.^8-10 The side effects of vemurafenib have been ascribed to a paradoxical upregulation of MAPK in BRAF wild-type cells. This effect has been well documented and demonstrated in vivo.^8,10 Perhaps erlotinib has a similar potential to paradoxically upregulate the MAPK pathway, thus stimulating cellular proliferation and survival.

Another tyrosine kinase receptor, c-KIT, is found on the cell membrane of melanocytes along with EGFR.^11,12 The c-KIT receptor also activates the MAPK pathway and is critical to the development, migration, and survival of melanocytes.^11,13 Stimulation of the c-KIT tyrosine kinase receptor also can induce melanocyte proliferation and melanogenesis.¹¹ The c-KIT receptor is encoded by the KIT gene (KIT proto-oncogene receptor tyrosine kinase). Mutations in this gene are associated with melanocytic disorders. Inherited KIT mutation leading to c-KIT receptor deficiency is associated with piebaldism. Acquired activating KIT mutations increasing c-KIT expression are associated with acral and mucosal melanomas as well as melanomas in chronically sun-damaged skin.¹³

We hypothesized that erlotinib-induced inhibition of the MAPK pathway could lead to a reactive increase in expression of c-KIT and thus stimulate melanocyte proliferation and pigment production. Similar feedback upregulation of an MAPK pathway stimulating receptor during downstream MAPK inhibition has been demonstrated in colon adenocarcinoma; in this setting, BRAF inhibitors blocking the MAPK pathway leads to upregulation of EGFR.­¹⁴ In our patient, c-KIT immunostaining revealed a mild to moderate increase in intensity (ie, the darkness of the staining) in nevi and melanomas during treatment with erlotinib compared to nevi biopsied before erlotinib treatment (Figure 2). The increased intensity of c-KIT immunostaining was further confirmed via semiquantitative digital image analysis. Using this method, a darkened nevus biopsied during treatment with erlotinib demonstrated 43.16% of cells (N=31,451) had very strong c-KIT staining, while a nevus biopsied before treatment with erlotinib demonstrated only 3.32% of cells (N=7507) with very strong c-KIT staining. Increased expression of c-KIT, possibly reactive to downstream inhibition the MAPK pathway from erlotinib, could be implicated in our case of eruptive nevi. 

To the Editor:

Erlotinib is a small-molecule selective tyrosine kinase inhibitor that functions by blocking the intracellular portion of the epidermal growth factor receptor (EGFR)^1,2; EGFR normally is expressed in the basal layer of the epidermis, sweat glands, and hair follicles, and is overexpressed in some cancers.^1,3 Normal activation of EGFR leads to signal transduction through the mitogen-activated protein kinase (MAPK) signaling pathway, which stimulates cell survival and proliferation.^4,5 Erlotinib-induced inhibition of EGFR prevents tyrosine kinase phosphorylation and aims to decrease cell proliferation in these tumors.

Erlotinib is indicated as once-daily oral monotherapy for the treatment of advanced-stage non–small cell lung cancer (NSCLCA) and in combination with gemcitabine for treatment of advanced-stage pancreatic cancer.¹ A number of cutaneous side effects have been reported, including acneform eruption, xerosis, paronychia, and pruritus.⁶ Other tyrosine kinase inhibitors, which also decrease signal transduction through the MAPK pathway, have some overlapping side effects; among these are vemurafenib, a selective BRAF inhibitor, and sorafenib, a multikinase inhibitor.^7,8

A 70-year-old man with NSCLCA presented with eruptive nevi and darkening of existing nevi 3 months after starting monotherapy with erlotinib. Physical examination demonstrated the simultaneous appearance of scattered acneform papules and pustules; diffuse xerosis; and numerous dark brown to black nevi on the trunk, arms, and legs. Compared to prior clinical photographs taken in our office, darkening of existing medium brown nevi was noted, and new nevi developed in areas where no prior nevi had been visible (Figure 1).

A review of the patient’s treatment timeline revealed that all other chemotherapeutic medications had been discontinued a minimum of 5 weeks before starting erlotinib. A complete cutaneous examination performed in our office after completion of these chemotherapeutic agents and prior to initiation of erlotinib was unremarkable for abnormally dark or eruptive nevi.

Since starting erlotinib treatment, the patient underwent 10 biopsies of clinically suspicious dark nevi performed by a dermatologist in our office. Two of these were diagnosed as melanoma in situ and one as an atypical nevus. A temporal association of the darkening and eruptive nevi with erlotinib treatment was established; however, because erlotinib was essential to his NSCLCA treatment, he continued erlotinib with frequent complete cutaneous examinations.

A number of cutaneous side effects have been described during treatment with erlotinib, the most common being acneform eruption.⁶ The incidence and severity of acneform eruptions have been positively correlated to survival in patients with NSCLCA.^3,5,6 Other common side effects include xerosis, paronychia, and pruritus.^1,5,6 Less common side effects include periungual pyogenic granulomas and hair growth abnormalities.¹

Eruptive nevi previously were reported in a patient who was treated with erlotinib.¹ Other tyrosine kinase inhibitors that also decrease signal transduction through the MAPK pathway, including sorafenib and vemurafenib, have been reported to cause eruptive nevi. There are 7 reports of eruptive nevi with sorafenib and 5 reports with vemurafenib.^7-9 Development of nevi were noted within a few months of initiating treatment with these medications.⁷

A PubMed search of articles indexed for MEDLINE using the terms erlotinib and melanoma and erlotinib and nevi yielded no prior reports of darkening of existing nevi or the development of melanoma during treatment with erlotinib. However, vemurafenib has been reported to cause dysplastic nevi, melanomas, and darkening of existing nevi, in addition to eruptive nevi.^8-10 The side effects of vemurafenib have been ascribed to a paradoxical upregulation of MAPK in BRAF wild-type cells. This effect has been well documented and demonstrated in vivo.^8,10 Perhaps erlotinib has a similar potential to paradoxically upregulate the MAPK pathway, thus stimulating cellular proliferation and survival.

Another tyrosine kinase receptor, c-KIT, is found on the cell membrane of melanocytes along with EGFR.^11,12 The c-KIT receptor also activates the MAPK pathway and is critical to the development, migration, and survival of melanocytes.^11,13 Stimulation of the c-KIT tyrosine kinase receptor also can induce melanocyte proliferation and melanogenesis.¹¹ The c-KIT receptor is encoded by the KIT gene (KIT proto-oncogene receptor tyrosine kinase). Mutations in this gene are associated with melanocytic disorders. Inherited KIT mutation leading to c-KIT receptor deficiency is associated with piebaldism. Acquired activating KIT mutations increasing c-KIT expression are associated with acral and mucosal melanomas as well as melanomas in chronically sun-damaged skin.¹³

We hypothesized that erlotinib-induced inhibition of the MAPK pathway could lead to a reactive increase in expression of c-KIT and thus stimulate melanocyte proliferation and pigment production. Similar feedback upregulation of an MAPK pathway stimulating receptor during downstream MAPK inhibition has been demonstrated in colon adenocarcinoma; in this setting, BRAF inhibitors blocking the MAPK pathway leads to upregulation of EGFR.­¹⁴ In our patient, c-KIT immunostaining revealed a mild to moderate increase in intensity (ie, the darkness of the staining) in nevi and melanomas during treatment with erlotinib compared to nevi biopsied before erlotinib treatment (Figure 2). The increased intensity of c-KIT immunostaining was further confirmed via semiquantitative digital image analysis. Using this method, a darkened nevus biopsied during treatment with erlotinib demonstrated 43.16% of cells (N=31,451) had very strong c-KIT staining, while a nevus biopsied before treatment with erlotinib demonstrated only 3.32% of cells (N=7507) with very strong c-KIT staining. Increased expression of c-KIT, possibly reactive to downstream inhibition the MAPK pathway from erlotinib, could be implicated in our case of eruptive nevi. 

To the Editor:

Erlotinib is a small-molecule selective tyrosine kinase inhibitor that functions by blocking the intracellular portion of the epidermal growth factor receptor (EGFR)^1,2; EGFR normally is expressed in the basal layer of the epidermis, sweat glands, and hair follicles, and is overexpressed in some cancers.^1,3 Normal activation of EGFR leads to signal transduction through the mitogen-activated protein kinase (MAPK) signaling pathway, which stimulates cell survival and proliferation.^4,5 Erlotinib-induced inhibition of EGFR prevents tyrosine kinase phosphorylation and aims to decrease cell proliferation in these tumors.

Erlotinib is indicated as once-daily oral monotherapy for the treatment of advanced-stage non–small cell lung cancer (NSCLCA) and in combination with gemcitabine for treatment of advanced-stage pancreatic cancer.¹ A number of cutaneous side effects have been reported, including acneform eruption, xerosis, paronychia, and pruritus.⁶ Other tyrosine kinase inhibitors, which also decrease signal transduction through the MAPK pathway, have some overlapping side effects; among these are vemurafenib, a selective BRAF inhibitor, and sorafenib, a multikinase inhibitor.^7,8

A 70-year-old man with NSCLCA presented with eruptive nevi and darkening of existing nevi 3 months after starting monotherapy with erlotinib. Physical examination demonstrated the simultaneous appearance of scattered acneform papules and pustules; diffuse xerosis; and numerous dark brown to black nevi on the trunk, arms, and legs. Compared to prior clinical photographs taken in our office, darkening of existing medium brown nevi was noted, and new nevi developed in areas where no prior nevi had been visible (Figure 1).

A review of the patient’s treatment timeline revealed that all other chemotherapeutic medications had been discontinued a minimum of 5 weeks before starting erlotinib. A complete cutaneous examination performed in our office after completion of these chemotherapeutic agents and prior to initiation of erlotinib was unremarkable for abnormally dark or eruptive nevi.

Since starting erlotinib treatment, the patient underwent 10 biopsies of clinically suspicious dark nevi performed by a dermatologist in our office. Two of these were diagnosed as melanoma in situ and one as an atypical nevus. A temporal association of the darkening and eruptive nevi with erlotinib treatment was established; however, because erlotinib was essential to his NSCLCA treatment, he continued erlotinib with frequent complete cutaneous examinations.

A number of cutaneous side effects have been described during treatment with erlotinib, the most common being acneform eruption.⁶ The incidence and severity of acneform eruptions have been positively correlated to survival in patients with NSCLCA.^3,5,6 Other common side effects include xerosis, paronychia, and pruritus.^1,5,6 Less common side effects include periungual pyogenic granulomas and hair growth abnormalities.¹

Eruptive nevi previously were reported in a patient who was treated with erlotinib.¹ Other tyrosine kinase inhibitors that also decrease signal transduction through the MAPK pathway, including sorafenib and vemurafenib, have been reported to cause eruptive nevi. There are 7 reports of eruptive nevi with sorafenib and 5 reports with vemurafenib.^7-9 Development of nevi were noted within a few months of initiating treatment with these medications.⁷

A PubMed search of articles indexed for MEDLINE using the terms erlotinib and melanoma and erlotinib and nevi yielded no prior reports of darkening of existing nevi or the development of melanoma during treatment with erlotinib. However, vemurafenib has been reported to cause dysplastic nevi, melanomas, and darkening of existing nevi, in addition to eruptive nevi.^8-10 The side effects of vemurafenib have been ascribed to a paradoxical upregulation of MAPK in BRAF wild-type cells. This effect has been well documented and demonstrated in vivo.^8,10 Perhaps erlotinib has a similar potential to paradoxically upregulate the MAPK pathway, thus stimulating cellular proliferation and survival.

Another tyrosine kinase receptor, c-KIT, is found on the cell membrane of melanocytes along with EGFR.^11,12 The c-KIT receptor also activates the MAPK pathway and is critical to the development, migration, and survival of melanocytes.^11,13 Stimulation of the c-KIT tyrosine kinase receptor also can induce melanocyte proliferation and melanogenesis.¹¹ The c-KIT receptor is encoded by the KIT gene (KIT proto-oncogene receptor tyrosine kinase). Mutations in this gene are associated with melanocytic disorders. Inherited KIT mutation leading to c-KIT receptor deficiency is associated with piebaldism. Acquired activating KIT mutations increasing c-KIT expression are associated with acral and mucosal melanomas as well as melanomas in chronically sun-damaged skin.¹³

We hypothesized that erlotinib-induced inhibition of the MAPK pathway could lead to a reactive increase in expression of c-KIT and thus stimulate melanocyte proliferation and pigment production. Similar feedback upregulation of an MAPK pathway stimulating receptor during downstream MAPK inhibition has been demonstrated in colon adenocarcinoma; in this setting, BRAF inhibitors blocking the MAPK pathway leads to upregulation of EGFR.­¹⁴ In our patient, c-KIT immunostaining revealed a mild to moderate increase in intensity (ie, the darkness of the staining) in nevi and melanomas during treatment with erlotinib compared to nevi biopsied before erlotinib treatment (Figure 2). The increased intensity of c-KIT immunostaining was further confirmed via semiquantitative digital image analysis. Using this method, a darkened nevus biopsied during treatment with erlotinib demonstrated 43.16% of cells (N=31,451) had very strong c-KIT staining, while a nevus biopsied before treatment with erlotinib demonstrated only 3.32% of cells (N=7507) with very strong c-KIT staining. Increased expression of c-KIT, possibly reactive to downstream inhibition the MAPK pathway from erlotinib, could be implicated in our case of eruptive nevi. 

MILAN – Targeting the Janus kinase (JAK) 1 and 2 pathways in vitiligo resulted in significant reduction of facial depigmentation after 24 weeks of treatment, in a phase 2b trial of topical ruxolitinib cream.

Kari Oakes/MDedge News

With all four doses of ruxolitinib in the cream formulation evaluated, significantly more patients with vitiligo had at least 50% facial repigmentation, compared with vehicle alone, said David Rosmarin, MD, speaking in a late-breaking abstracts session at the World Congress of Dermatology.

The highest response rate was seen with a higher dose: Among patients receiving ruxolitinib cream 1.5% once daily, 50% met the 50% clearing mark at 24 weeks, as did 45.5% of those with twice-daily 1.5% dosing of the 1.5% formulation. At 24 weeks, 3.1% of those receiving vehicle had 50% facial vitiligo resolution (P less than .0001, compared with vehicle for both doses).

Vitiligo affects about 3,000,000 people in the United States, and it is a plausible treatment target for the JAK inhibitor ruxolitinib, explained Dr. Rosmarin, a dermatologist at Tufts University, Boston. “Interferon-gamma, signaling through JAK1 and JAK2, is central to the pathogenesis of vitiligo,” he said. “Ruxolitinib is a potent inhibitor of JAK1 and JAK2, so it made sense to investigate it as a treatment for vitiligo.”

The 24-month randomized, double-blind, vehicle-controlled phase 2 study of ruxolitinib cream for vitiligo compared the vehicle to four different concentrations of ruxolitinib during the first phase of the study. For the first 24 weeks, patients were randomized to receive vehicle twice daily, or various doses of ruxolitinib ranging from 0.15% once daily to 1.5% twice daily.

At this point, the study’s primary endpoint was assessed, with investigators comparing the proportion of patients treated with ruxolitinib who had at least 50% improvement in facial repigmentation from baseline on the Facial Vitiligo Area Scoring Index (F-VASI50) compared with those who received vehicle. A secondary endpoint, also assessed at week 24, was the proportion of patients who were clear, or almost clear, of facial vitiligo; safety and tolerability were also assessed.

In addition to the F-VASI50 measure, Dr. Rosmarin and his coinvestigators also tracked 75% facial clearing (F-VASI75). Here, the 1.5% twice daily regimen topped the others, with 30% of those receiving that dose achieving F-VASI75, compared with almost 10%-17% of those on other doses.

Using another measure, More than one-third of patients using ruxolitinib (35.3%) had clear (no signs of vitiligo) or almost clear (only specks of depigmentation) facial skin at week 24, according to a clinician assessment tool. No patients on placebo had clear or almost clear facial skin at that point. “It is my hope that with continued use beyond week 24, more patients will meet this very stringent endpoint,” Dr. Rosmarin said.

The safety profile was good, with no serious treatment-related adverse events, and no application site reactions that reached clinical significance, although numerically more patients reported acne with ruxolitinib than with vehicle alone.


In the trial, patients aged 18-75 years with vitiligo were eligible if they had facial depigmentation that constituted at least half of their body surface area (BSA), as well as depigmentation of at least 3% of BSA on nonfacial areas. Patients were excluded if they had another dermatologic disease, infection, prior JAK inhibitor therapy, or recent use of biologic or experimental drugs, laser or light-based treatments, or immunomodulators. Of the 157 patients who were randomized, 18 patients (11.5%) had discontinued treatment by week 24, with 3 patients stopping for adverse events, 3 for protocol deviation or noncompliance, and 10 withdrawals. Two patients were lost to follow-up; all patients were included in analysis of the primary and secondary endpoints.

In the second year of the study, investigators rerandomized patients who had been receiving vehicle to an active arm of the study, and patients who had less than 25% improvement on a facial vitiligo scoring scale were rerandomized to one of the different doses. Twenty-eight weeks after rerandomization, all participants were given the opportunity to participate in a year-long open-label extension, receiving 1.5% ruxolitinib cream twice daily. Phototherapy was allowed in the extension arm, but not in the first year of the study.

Data beyond 24 weeks have not yet been reported, and the 2-year study plan acknowledged that “repigmentation takes a while,” Dr. Rosmarin said. He added that patients were allowed to use the study drug on body vitiligo as well, and many saw improvement there, although these results weren’t tracked in the study. “This isn’t a drug that’s meant just for the face,” he said.

Dr. Rosmarin and his coauthors reported financial arrangements with several pharmaceutical companies, including Incyte, which funded the study. An oral formulation of ruxolitinib (Jakafi), marketed by Incyte, was approved by the Food and Drug Administration in 2011, for myelofibrosis, and was recently approved for steroid-refractory acute graft-versus-host disease in adults and children aged 12 years and older.

koakes@mdedge.com

MILAN – Targeting the Janus kinase (JAK) 1 and 2 pathways in vitiligo resulted in significant reduction of facial depigmentation after 24 weeks of treatment, in a phase 2b trial of topical ruxolitinib cream.

Kari Oakes/MDedge News

With all four doses of ruxolitinib in the cream formulation evaluated, significantly more patients with vitiligo had at least 50% facial repigmentation, compared with vehicle alone, said David Rosmarin, MD, speaking in a late-breaking abstracts session at the World Congress of Dermatology.

The highest response rate was seen with a higher dose: Among patients receiving ruxolitinib cream 1.5% once daily, 50% met the 50% clearing mark at 24 weeks, as did 45.5% of those with twice-daily 1.5% dosing of the 1.5% formulation. At 24 weeks, 3.1% of those receiving vehicle had 50% facial vitiligo resolution (P less than .0001, compared with vehicle for both doses).

Vitiligo affects about 3,000,000 people in the United States, and it is a plausible treatment target for the JAK inhibitor ruxolitinib, explained Dr. Rosmarin, a dermatologist at Tufts University, Boston. “Interferon-gamma, signaling through JAK1 and JAK2, is central to the pathogenesis of vitiligo,” he said. “Ruxolitinib is a potent inhibitor of JAK1 and JAK2, so it made sense to investigate it as a treatment for vitiligo.”

The 24-month randomized, double-blind, vehicle-controlled phase 2 study of ruxolitinib cream for vitiligo compared the vehicle to four different concentrations of ruxolitinib during the first phase of the study. For the first 24 weeks, patients were randomized to receive vehicle twice daily, or various doses of ruxolitinib ranging from 0.15% once daily to 1.5% twice daily.

At this point, the study’s primary endpoint was assessed, with investigators comparing the proportion of patients treated with ruxolitinib who had at least 50% improvement in facial repigmentation from baseline on the Facial Vitiligo Area Scoring Index (F-VASI50) compared with those who received vehicle. A secondary endpoint, also assessed at week 24, was the proportion of patients who were clear, or almost clear, of facial vitiligo; safety and tolerability were also assessed.

In addition to the F-VASI50 measure, Dr. Rosmarin and his coinvestigators also tracked 75% facial clearing (F-VASI75). Here, the 1.5% twice daily regimen topped the others, with 30% of those receiving that dose achieving F-VASI75, compared with almost 10%-17% of those on other doses.

Using another measure, More than one-third of patients using ruxolitinib (35.3%) had clear (no signs of vitiligo) or almost clear (only specks of depigmentation) facial skin at week 24, according to a clinician assessment tool. No patients on placebo had clear or almost clear facial skin at that point. “It is my hope that with continued use beyond week 24, more patients will meet this very stringent endpoint,” Dr. Rosmarin said.

The safety profile was good, with no serious treatment-related adverse events, and no application site reactions that reached clinical significance, although numerically more patients reported acne with ruxolitinib than with vehicle alone.


In the trial, patients aged 18-75 years with vitiligo were eligible if they had facial depigmentation that constituted at least half of their body surface area (BSA), as well as depigmentation of at least 3% of BSA on nonfacial areas. Patients were excluded if they had another dermatologic disease, infection, prior JAK inhibitor therapy, or recent use of biologic or experimental drugs, laser or light-based treatments, or immunomodulators. Of the 157 patients who were randomized, 18 patients (11.5%) had discontinued treatment by week 24, with 3 patients stopping for adverse events, 3 for protocol deviation or noncompliance, and 10 withdrawals. Two patients were lost to follow-up; all patients were included in analysis of the primary and secondary endpoints.

In the second year of the study, investigators rerandomized patients who had been receiving vehicle to an active arm of the study, and patients who had less than 25% improvement on a facial vitiligo scoring scale were rerandomized to one of the different doses. Twenty-eight weeks after rerandomization, all participants were given the opportunity to participate in a year-long open-label extension, receiving 1.5% ruxolitinib cream twice daily. Phototherapy was allowed in the extension arm, but not in the first year of the study.

Data beyond 24 weeks have not yet been reported, and the 2-year study plan acknowledged that “repigmentation takes a while,” Dr. Rosmarin said. He added that patients were allowed to use the study drug on body vitiligo as well, and many saw improvement there, although these results weren’t tracked in the study. “This isn’t a drug that’s meant just for the face,” he said.

Dr. Rosmarin and his coauthors reported financial arrangements with several pharmaceutical companies, including Incyte, which funded the study. An oral formulation of ruxolitinib (Jakafi), marketed by Incyte, was approved by the Food and Drug Administration in 2011, for myelofibrosis, and was recently approved for steroid-refractory acute graft-versus-host disease in adults and children aged 12 years and older.

koakes@mdedge.com

MILAN – Targeting the Janus kinase (JAK) 1 and 2 pathways in vitiligo resulted in significant reduction of facial depigmentation after 24 weeks of treatment, in a phase 2b trial of topical ruxolitinib cream.

Kari Oakes/MDedge News

With all four doses of ruxolitinib in the cream formulation evaluated, significantly more patients with vitiligo had at least 50% facial repigmentation, compared with vehicle alone, said David Rosmarin, MD, speaking in a late-breaking abstracts session at the World Congress of Dermatology.

The highest response rate was seen with a higher dose: Among patients receiving ruxolitinib cream 1.5% once daily, 50% met the 50% clearing mark at 24 weeks, as did 45.5% of those with twice-daily 1.5% dosing of the 1.5% formulation. At 24 weeks, 3.1% of those receiving vehicle had 50% facial vitiligo resolution (P less than .0001, compared with vehicle for both doses).

Vitiligo affects about 3,000,000 people in the United States, and it is a plausible treatment target for the JAK inhibitor ruxolitinib, explained Dr. Rosmarin, a dermatologist at Tufts University, Boston. “Interferon-gamma, signaling through JAK1 and JAK2, is central to the pathogenesis of vitiligo,” he said. “Ruxolitinib is a potent inhibitor of JAK1 and JAK2, so it made sense to investigate it as a treatment for vitiligo.”

The 24-month randomized, double-blind, vehicle-controlled phase 2 study of ruxolitinib cream for vitiligo compared the vehicle to four different concentrations of ruxolitinib during the first phase of the study. For the first 24 weeks, patients were randomized to receive vehicle twice daily, or various doses of ruxolitinib ranging from 0.15% once daily to 1.5% twice daily.

At this point, the study’s primary endpoint was assessed, with investigators comparing the proportion of patients treated with ruxolitinib who had at least 50% improvement in facial repigmentation from baseline on the Facial Vitiligo Area Scoring Index (F-VASI50) compared with those who received vehicle. A secondary endpoint, also assessed at week 24, was the proportion of patients who were clear, or almost clear, of facial vitiligo; safety and tolerability were also assessed.

In addition to the F-VASI50 measure, Dr. Rosmarin and his coinvestigators also tracked 75% facial clearing (F-VASI75). Here, the 1.5% twice daily regimen topped the others, with 30% of those receiving that dose achieving F-VASI75, compared with almost 10%-17% of those on other doses.

Using another measure, More than one-third of patients using ruxolitinib (35.3%) had clear (no signs of vitiligo) or almost clear (only specks of depigmentation) facial skin at week 24, according to a clinician assessment tool. No patients on placebo had clear or almost clear facial skin at that point. “It is my hope that with continued use beyond week 24, more patients will meet this very stringent endpoint,” Dr. Rosmarin said.

The safety profile was good, with no serious treatment-related adverse events, and no application site reactions that reached clinical significance, although numerically more patients reported acne with ruxolitinib than with vehicle alone.


In the trial, patients aged 18-75 years with vitiligo were eligible if they had facial depigmentation that constituted at least half of their body surface area (BSA), as well as depigmentation of at least 3% of BSA on nonfacial areas. Patients were excluded if they had another dermatologic disease, infection, prior JAK inhibitor therapy, or recent use of biologic or experimental drugs, laser or light-based treatments, or immunomodulators. Of the 157 patients who were randomized, 18 patients (11.5%) had discontinued treatment by week 24, with 3 patients stopping for adverse events, 3 for protocol deviation or noncompliance, and 10 withdrawals. Two patients were lost to follow-up; all patients were included in analysis of the primary and secondary endpoints.

In the second year of the study, investigators rerandomized patients who had been receiving vehicle to an active arm of the study, and patients who had less than 25% improvement on a facial vitiligo scoring scale were rerandomized to one of the different doses. Twenty-eight weeks after rerandomization, all participants were given the opportunity to participate in a year-long open-label extension, receiving 1.5% ruxolitinib cream twice daily. Phototherapy was allowed in the extension arm, but not in the first year of the study.

Data beyond 24 weeks have not yet been reported, and the 2-year study plan acknowledged that “repigmentation takes a while,” Dr. Rosmarin said. He added that patients were allowed to use the study drug on body vitiligo as well, and many saw improvement there, although these results weren’t tracked in the study. “This isn’t a drug that’s meant just for the face,” he said.

Dr. Rosmarin and his coauthors reported financial arrangements with several pharmaceutical companies, including Incyte, which funded the study. An oral formulation of ruxolitinib (Jakafi), marketed by Incyte, was approved by the Food and Drug Administration in 2011, for myelofibrosis, and was recently approved for steroid-refractory acute graft-versus-host disease in adults and children aged 12 years and older.

koakes@mdedge.com

MILAN – Subtle signs beyond depigmentation alone can guide management of vitiligo, Michelle Rodrigues, MBBS, said at the World Congress of Dermatology.

Kari Oakes/MDedge News

Signs of high disease activity can be visually observed and, when found, can compel urgent treatment, Dr. Rodrigues said. “If we identify and understand these [signs, they] can change our management plan, and the patient’s outcomes ... picking these up quickly, getting the best response you can, can help our patients tremendously.”

To assess clinical signs of severity in vitiligo, “use the tools that you have in your practice – your dermatoscope, your Wood’s lamp.”

Showing an image of the leg of a patient with vitiligo, Dr. Rodrigues said, “I know this patient’s vitiligo is very, very active. Why?” Clues come when there are areas of hypopigmentation at the rim of lesions, with depigmentation at the center. The presence of pigmentation, hypopigmentation, and depigmentation within the same lesion indicates high disease activity. This finding is the trichrome sign, also called the “blurry borders” sign in some regions, said Dr. Rodrigues, a dermatologist in Melbourne and the founder of Chroma Dermatology, which specializes in treating pigment problems and diagnosing and managing skin conditions in patients with skin of color.

Next, Dr. Rodrigues said, look at hair growth within the vitiliginous area. “If you’re unable to see that clinically, it’s really important to get that dermatoscope onto the patient, and look within a patch, to see whether or not you can actually see white hairs or normal colored hairs,” she said. This finding will help to determine both treatment plan and prognosis, since leukotrichia is a marker of disease severity in vitiligo.

Be alert to Koebnerization, said Dr. Rodrigues; the presentation may be subtle. As an example, she shared an image of a patient with depigmented patches on the dorsum of each foot. It wasn’t until the patient removed her foot gear – rubber slide-type sandals with a single broad strap over the dorsum – that Dr. Rodrigues recognized that “there was clear Koebnerization from the constant friction as a result of the wearing of the shoes.

“This can also be seen when patients scratch themselves, as can be seen with the itch that vitiligo can sometimes cause,” she said.

She noted that about 10% of patients with vitiligo have pruritus as a prominent symptom. Here, she said, is where a Wood’s lamp can be helpful as well. “Sometimes we can’t appreciate the very, very subtle Koebnerization, especially in patients with lighter skin. Getting out that Wood’s lamp and looking at other areas of involvement is really important,” she said. Areas of high disease activity and signs of progression that might otherwise be missed will be more obvious under the ultraviolet light.

It’s important to look beyond the obvious patches of vitiligo to examine the surrounding skin. Searching for “confetti depigmentation” – tiny white dots of depigmentation scattered over the otherwise normally pigmented skin – also marks high disease activity. An area with these dots – each often only a few millimeters in diameter – is likely destined for rapid depigmentation unless aggressive treatment is started. “We know that without treating these areas there will be very, very rapid and aggressive depigmentation. And remember that in areas that have a paucity of hair follicles, it might be irreversible ... so recognizing these signs is absolutely critical.”

The final clue to highly active disease that’s likely to move quickly without intervention can be found at the border of a vitiligo lesion. Look for a fine rim of erythema and some scale, Dr. Rodrigues said. This sign is common, and often seen early in the disease course. When this erythematous region is biopsied, ”You’ll see an intense inflammatory response, with an interface dermatitis. Again, this tells us that the patient may have a poorer prognosis if we don’t commence treatment early on.”

As a final clinical tip, Dr. Rodrigues reminded attendees that when one sign of disease activity is seen, others are often present. A thorough clinical examination is needed to document aggressive disease. “Please make sure that if you find one, you’re looking for other signs of disease severity as well.”

Dr. Rodrigues reported that she had no disclosures relevant to her presentation.

koakes@mdedge.com

MILAN – Subtle signs beyond depigmentation alone can guide management of vitiligo, Michelle Rodrigues, MBBS, said at the World Congress of Dermatology.

Kari Oakes/MDedge News

Signs of high disease activity can be visually observed and, when found, can compel urgent treatment, Dr. Rodrigues said. “If we identify and understand these [signs, they] can change our management plan, and the patient’s outcomes ... picking these up quickly, getting the best response you can, can help our patients tremendously.”

To assess clinical signs of severity in vitiligo, “use the tools that you have in your practice – your dermatoscope, your Wood’s lamp.”

Showing an image of the leg of a patient with vitiligo, Dr. Rodrigues said, “I know this patient’s vitiligo is very, very active. Why?” Clues come when there are areas of hypopigmentation at the rim of lesions, with depigmentation at the center. The presence of pigmentation, hypopigmentation, and depigmentation within the same lesion indicates high disease activity. This finding is the trichrome sign, also called the “blurry borders” sign in some regions, said Dr. Rodrigues, a dermatologist in Melbourne and the founder of Chroma Dermatology, which specializes in treating pigment problems and diagnosing and managing skin conditions in patients with skin of color.

Next, Dr. Rodrigues said, look at hair growth within the vitiliginous area. “If you’re unable to see that clinically, it’s really important to get that dermatoscope onto the patient, and look within a patch, to see whether or not you can actually see white hairs or normal colored hairs,” she said. This finding will help to determine both treatment plan and prognosis, since leukotrichia is a marker of disease severity in vitiligo.

Be alert to Koebnerization, said Dr. Rodrigues; the presentation may be subtle. As an example, she shared an image of a patient with depigmented patches on the dorsum of each foot. It wasn’t until the patient removed her foot gear – rubber slide-type sandals with a single broad strap over the dorsum – that Dr. Rodrigues recognized that “there was clear Koebnerization from the constant friction as a result of the wearing of the shoes.

“This can also be seen when patients scratch themselves, as can be seen with the itch that vitiligo can sometimes cause,” she said.

She noted that about 10% of patients with vitiligo have pruritus as a prominent symptom. Here, she said, is where a Wood’s lamp can be helpful as well. “Sometimes we can’t appreciate the very, very subtle Koebnerization, especially in patients with lighter skin. Getting out that Wood’s lamp and looking at other areas of involvement is really important,” she said. Areas of high disease activity and signs of progression that might otherwise be missed will be more obvious under the ultraviolet light.

It’s important to look beyond the obvious patches of vitiligo to examine the surrounding skin. Searching for “confetti depigmentation” – tiny white dots of depigmentation scattered over the otherwise normally pigmented skin – also marks high disease activity. An area with these dots – each often only a few millimeters in diameter – is likely destined for rapid depigmentation unless aggressive treatment is started. “We know that without treating these areas there will be very, very rapid and aggressive depigmentation. And remember that in areas that have a paucity of hair follicles, it might be irreversible ... so recognizing these signs is absolutely critical.”

The final clue to highly active disease that’s likely to move quickly without intervention can be found at the border of a vitiligo lesion. Look for a fine rim of erythema and some scale, Dr. Rodrigues said. This sign is common, and often seen early in the disease course. When this erythematous region is biopsied, ”You’ll see an intense inflammatory response, with an interface dermatitis. Again, this tells us that the patient may have a poorer prognosis if we don’t commence treatment early on.”

As a final clinical tip, Dr. Rodrigues reminded attendees that when one sign of disease activity is seen, others are often present. A thorough clinical examination is needed to document aggressive disease. “Please make sure that if you find one, you’re looking for other signs of disease severity as well.”

Dr. Rodrigues reported that she had no disclosures relevant to her presentation.

koakes@mdedge.com

MILAN – Subtle signs beyond depigmentation alone can guide management of vitiligo, Michelle Rodrigues, MBBS, said at the World Congress of Dermatology.

Kari Oakes/MDedge News

Signs of high disease activity can be visually observed and, when found, can compel urgent treatment, Dr. Rodrigues said. “If we identify and understand these [signs, they] can change our management plan, and the patient’s outcomes ... picking these up quickly, getting the best response you can, can help our patients tremendously.”

To assess clinical signs of severity in vitiligo, “use the tools that you have in your practice – your dermatoscope, your Wood’s lamp.”

Showing an image of the leg of a patient with vitiligo, Dr. Rodrigues said, “I know this patient’s vitiligo is very, very active. Why?” Clues come when there are areas of hypopigmentation at the rim of lesions, with depigmentation at the center. The presence of pigmentation, hypopigmentation, and depigmentation within the same lesion indicates high disease activity. This finding is the trichrome sign, also called the “blurry borders” sign in some regions, said Dr. Rodrigues, a dermatologist in Melbourne and the founder of Chroma Dermatology, which specializes in treating pigment problems and diagnosing and managing skin conditions in patients with skin of color.

Next, Dr. Rodrigues said, look at hair growth within the vitiliginous area. “If you’re unable to see that clinically, it’s really important to get that dermatoscope onto the patient, and look within a patch, to see whether or not you can actually see white hairs or normal colored hairs,” she said. This finding will help to determine both treatment plan and prognosis, since leukotrichia is a marker of disease severity in vitiligo.

Be alert to Koebnerization, said Dr. Rodrigues; the presentation may be subtle. As an example, she shared an image of a patient with depigmented patches on the dorsum of each foot. It wasn’t until the patient removed her foot gear – rubber slide-type sandals with a single broad strap over the dorsum – that Dr. Rodrigues recognized that “there was clear Koebnerization from the constant friction as a result of the wearing of the shoes.

“This can also be seen when patients scratch themselves, as can be seen with the itch that vitiligo can sometimes cause,” she said.

She noted that about 10% of patients with vitiligo have pruritus as a prominent symptom. Here, she said, is where a Wood’s lamp can be helpful as well. “Sometimes we can’t appreciate the very, very subtle Koebnerization, especially in patients with lighter skin. Getting out that Wood’s lamp and looking at other areas of involvement is really important,” she said. Areas of high disease activity and signs of progression that might otherwise be missed will be more obvious under the ultraviolet light.

It’s important to look beyond the obvious patches of vitiligo to examine the surrounding skin. Searching for “confetti depigmentation” – tiny white dots of depigmentation scattered over the otherwise normally pigmented skin – also marks high disease activity. An area with these dots – each often only a few millimeters in diameter – is likely destined for rapid depigmentation unless aggressive treatment is started. “We know that without treating these areas there will be very, very rapid and aggressive depigmentation. And remember that in areas that have a paucity of hair follicles, it might be irreversible ... so recognizing these signs is absolutely critical.”

The final clue to highly active disease that’s likely to move quickly without intervention can be found at the border of a vitiligo lesion. Look for a fine rim of erythema and some scale, Dr. Rodrigues said. This sign is common, and often seen early in the disease course. When this erythematous region is biopsied, ”You’ll see an intense inflammatory response, with an interface dermatitis. Again, this tells us that the patient may have a poorer prognosis if we don’t commence treatment early on.”

As a final clinical tip, Dr. Rodrigues reminded attendees that when one sign of disease activity is seen, others are often present. A thorough clinical examination is needed to document aggressive disease. “Please make sure that if you find one, you’re looking for other signs of disease severity as well.”

Dr. Rodrigues reported that she had no disclosures relevant to her presentation.

koakes@mdedge.com

Sequential therapy of oral propranolol then topical timolol for infantile hemangioma helped shorten duration of propranolol and maintain treatment success, according to a study published in Pediatric Dermatology.

hypotekyfidler/Getty Images

Diana B. Mannschreck, BSN, of Johns Hopkins University, Baltimore, and colleagues performed a retrospective chart review of 559 patients with infantile hemangioma seen in the dermatology clinic at Johns Hopkins between December 2008 and January 2018. Patients received any of five courses of treatment, including oral propranolol followed by topical timolol, propranolol only, and timolol only. Of the courses evaluated, propranolol followed by timolol had the shortest duration of propranolol therapy – a median of 2.2 months shorter than propranolol-only therapy (P = .0006). This sequential regimen also was associated with no reinitiations of propranolol therapy following tapering, whereas 13% of those receiving propranolol alone had to reinitiate it after tapering.

This is of interest because oral beta-blockers, including propranolol, have been associated with rare but serious adverse events, such as bronchospasm, hypotension, and hypoglycemia.

Limitations of the study include its retrospective and single-center nature. There was no funding or disclosure information given.

cpalmer@mdedge.com

SOURCE: Mannschreck DB et al. Pediatr Dermatol. 2019 Apr 9. doi: 10.1111/pde.13816.

Sequential therapy of oral propranolol then topical timolol for infantile hemangioma helped shorten duration of propranolol and maintain treatment success, according to a study published in Pediatric Dermatology.

hypotekyfidler/Getty Images

Diana B. Mannschreck, BSN, of Johns Hopkins University, Baltimore, and colleagues performed a retrospective chart review of 559 patients with infantile hemangioma seen in the dermatology clinic at Johns Hopkins between December 2008 and January 2018. Patients received any of five courses of treatment, including oral propranolol followed by topical timolol, propranolol only, and timolol only. Of the courses evaluated, propranolol followed by timolol had the shortest duration of propranolol therapy – a median of 2.2 months shorter than propranolol-only therapy (P = .0006). This sequential regimen also was associated with no reinitiations of propranolol therapy following tapering, whereas 13% of those receiving propranolol alone had to reinitiate it after tapering.

This is of interest because oral beta-blockers, including propranolol, have been associated with rare but serious adverse events, such as bronchospasm, hypotension, and hypoglycemia.

Limitations of the study include its retrospective and single-center nature. There was no funding or disclosure information given.

cpalmer@mdedge.com

SOURCE: Mannschreck DB et al. Pediatr Dermatol. 2019 Apr 9. doi: 10.1111/pde.13816.

Sequential therapy of oral propranolol then topical timolol for infantile hemangioma helped shorten duration of propranolol and maintain treatment success, according to a study published in Pediatric Dermatology.

hypotekyfidler/Getty Images

Diana B. Mannschreck, BSN, of Johns Hopkins University, Baltimore, and colleagues performed a retrospective chart review of 559 patients with infantile hemangioma seen in the dermatology clinic at Johns Hopkins between December 2008 and January 2018. Patients received any of five courses of treatment, including oral propranolol followed by topical timolol, propranolol only, and timolol only. Of the courses evaluated, propranolol followed by timolol had the shortest duration of propranolol therapy – a median of 2.2 months shorter than propranolol-only therapy (P = .0006). This sequential regimen also was associated with no reinitiations of propranolol therapy following tapering, whereas 13% of those receiving propranolol alone had to reinitiate it after tapering.

This is of interest because oral beta-blockers, including propranolol, have been associated with rare but serious adverse events, such as bronchospasm, hypotension, and hypoglycemia.

Limitations of the study include its retrospective and single-center nature. There was no funding or disclosure information given.

cpalmer@mdedge.com

SOURCE: Mannschreck DB et al. Pediatr Dermatol. 2019 Apr 9. doi: 10.1111/pde.13816.

Though responses to topical calcineurin inhibitors (TCIs) plus phototherapy were found to be higher than TCI monotherapy, a meta-analysis of studies on TCI therapy found that both should be used in treatment for patients with vitiligo.

“In addition, the proactive use of TCIs to maintain remission of vitiligo could be promising, considering its high recurrence rate,” wrote Ji Hae Lee, MD, PhD, of the Catholic University of Korea, Seoul, and coauthors in JAMA Dermatology.

To assess TCIs as treatment for vitiligo, the researchers undertook a systematic review and analysis of 56 relevant studies. Eleven of the studies were on the TCI mechanism; 36 were on TCI monotherapy; 12 were on TCI plus phototherapy; and 1 was on TCI maintenance therapy. Treatment responses for each study were measured via the degree of repigmentation on a quartile scale: an at least mild response (25% or greater repigmentation), at least moderate response (50% or greater repigmentation), and marked response (75% or greater repigmentation).

In regard to TCI monotherapy, an at least mild response was achieved in 55% (95% confidence interval, 42.2%-67.8%) of 560 patients in 21 studies. An at least moderate response was achieved in 38.5% (95% CI, 28.2%-48.8%) of 619 patients in 23 studies, and there was a marked response in 18.1% (95% CI, 13.2%-23.1%) of 520 patients in 19 studies.

For TCI plus phototherapy, an at least mild response was achieved in 89.5% (95% CI, 81.1%-97.9%) of 433 patients in eight studies. An at least moderate response was achieved in 72.9% (95% CI, 57.6%-88.2%) of 486 patients in 10 studies, and a marked response was achieved in 47.5% (95% CI, 30.6%-64.4%) of 490 patients in 9 studies.

The authors noted several limitations with their review, including a level of heterogeneity in the study designs, characteristics of the patients, and protocols. They also acknowledged that the quartile scale may be somewhat arbitrary in nature, though they added that it has been the “most commonly used measure and would have been one of the best estimates of the treatment response at this time.”

The authors report no conflicts of interest.

SOURCE: Lee JH et al. Jama Dermatol. 2019 May 29. doi: 10.1001/Jamadermatol.2019.0696.

Though responses to topical calcineurin inhibitors (TCIs) plus phototherapy were found to be higher than TCI monotherapy, a meta-analysis of studies on TCI therapy found that both should be used in treatment for patients with vitiligo.

“In addition, the proactive use of TCIs to maintain remission of vitiligo could be promising, considering its high recurrence rate,” wrote Ji Hae Lee, MD, PhD, of the Catholic University of Korea, Seoul, and coauthors in JAMA Dermatology.

To assess TCIs as treatment for vitiligo, the researchers undertook a systematic review and analysis of 56 relevant studies. Eleven of the studies were on the TCI mechanism; 36 were on TCI monotherapy; 12 were on TCI plus phototherapy; and 1 was on TCI maintenance therapy. Treatment responses for each study were measured via the degree of repigmentation on a quartile scale: an at least mild response (25% or greater repigmentation), at least moderate response (50% or greater repigmentation), and marked response (75% or greater repigmentation).

In regard to TCI monotherapy, an at least mild response was achieved in 55% (95% confidence interval, 42.2%-67.8%) of 560 patients in 21 studies. An at least moderate response was achieved in 38.5% (95% CI, 28.2%-48.8%) of 619 patients in 23 studies, and there was a marked response in 18.1% (95% CI, 13.2%-23.1%) of 520 patients in 19 studies.

For TCI plus phototherapy, an at least mild response was achieved in 89.5% (95% CI, 81.1%-97.9%) of 433 patients in eight studies. An at least moderate response was achieved in 72.9% (95% CI, 57.6%-88.2%) of 486 patients in 10 studies, and a marked response was achieved in 47.5% (95% CI, 30.6%-64.4%) of 490 patients in 9 studies.

The authors noted several limitations with their review, including a level of heterogeneity in the study designs, characteristics of the patients, and protocols. They also acknowledged that the quartile scale may be somewhat arbitrary in nature, though they added that it has been the “most commonly used measure and would have been one of the best estimates of the treatment response at this time.”

The authors report no conflicts of interest.

SOURCE: Lee JH et al. Jama Dermatol. 2019 May 29. doi: 10.1001/Jamadermatol.2019.0696.

Though responses to topical calcineurin inhibitors (TCIs) plus phototherapy were found to be higher than TCI monotherapy, a meta-analysis of studies on TCI therapy found that both should be used in treatment for patients with vitiligo.

“In addition, the proactive use of TCIs to maintain remission of vitiligo could be promising, considering its high recurrence rate,” wrote Ji Hae Lee, MD, PhD, of the Catholic University of Korea, Seoul, and coauthors in JAMA Dermatology.

To assess TCIs as treatment for vitiligo, the researchers undertook a systematic review and analysis of 56 relevant studies. Eleven of the studies were on the TCI mechanism; 36 were on TCI monotherapy; 12 were on TCI plus phototherapy; and 1 was on TCI maintenance therapy. Treatment responses for each study were measured via the degree of repigmentation on a quartile scale: an at least mild response (25% or greater repigmentation), at least moderate response (50% or greater repigmentation), and marked response (75% or greater repigmentation).

In regard to TCI monotherapy, an at least mild response was achieved in 55% (95% confidence interval, 42.2%-67.8%) of 560 patients in 21 studies. An at least moderate response was achieved in 38.5% (95% CI, 28.2%-48.8%) of 619 patients in 23 studies, and there was a marked response in 18.1% (95% CI, 13.2%-23.1%) of 520 patients in 19 studies.

For TCI plus phototherapy, an at least mild response was achieved in 89.5% (95% CI, 81.1%-97.9%) of 433 patients in eight studies. An at least moderate response was achieved in 72.9% (95% CI, 57.6%-88.2%) of 486 patients in 10 studies, and a marked response was achieved in 47.5% (95% CI, 30.6%-64.4%) of 490 patients in 9 studies.

The authors noted several limitations with their review, including a level of heterogeneity in the study designs, characteristics of the patients, and protocols. They also acknowledged that the quartile scale may be somewhat arbitrary in nature, though they added that it has been the “most commonly used measure and would have been one of the best estimates of the treatment response at this time.”

The authors report no conflicts of interest.

SOURCE: Lee JH et al. Jama Dermatol. 2019 May 29. doi: 10.1001/Jamadermatol.2019.0696.

To the Editor:

I read with interest the informative Cutis case report by Krooks and Weatherall¹ in which the authors not only described the case of a 66-year-old man whose diagnosis of bone marrow biopsy–confirmed acute myeloid leukemia (AML) presented concurrently with skin biopsy–confirmed leukemia cutis but also discussed the poor prognosis of individuals with acute myelogenous leukemia cutis. Their patient died within 5 weeks of establishing the diagnosis. In addition, lateral and frontal photographs of the patient’s face demonstrated diffuse infiltrative plaques of leukemia cutis; he had swollen eyelids and lips with distortion of the nose secondary to dermal infiltration of leukemic myeloid cells.¹ Although not emphasized by the authors, the patient appeared to have a leonine facies and at least partial loss of the lateral eyebrows.

Malignancy-associated leonine facies resulting from infiltration of the skin by neoplastic cells has been reported in a patient with metastatic breast carcinoma.^2,3 However, it predominantly occurs in patients with hematologic dyscrasias such as leukemia cutis, lymphoma (ie, cutaneous B cell, cutaneous T cell, Hodgkin), plasmacytoma, and systemic mastocytosis.^3,4 The report by Krooks and Weatherall¹ adds AML-associated leukemia cutis to the previously observed types of leukemia cutis–related leonine facies in patients with acute lymphocytic leukemia, acute myelomonocytic leukemia, and chronic lymphocytic leukemia.^3,4

Partial or complete loss of eyebrows in the setting of leonine facies has a limited differential diagnosis.^3,5 In addition to cancer, the associated disorders include adnexal mucin deposition (alopecia mucinosis), granulomatous conditions (sarcoidosis), infectious diseases (leprosy), inherited syndromes (Setleis syndrome), photoallergic dermatoses (actinic reticuloid), and viral conditions (viral-associated trichodysplasia).^3-9 Neoplasms associated with leonine facies and eyebrow loss include lymphomas (mycosis fungoides and unspecified cutaneous T-cell lymphoma), systemic mastocytosis and leukemia cutis secondary to acute lymphocytic leukemia, acute myelomonocytic leukemia, and now AML.^1,3-5

The eyebrow loss associated with leonine facies often is not reversible once the causative cell of the associated condition (eg, granulomas of mycobacteria-infected histiocytes in leprosy, neoplastic lymphocytes in cutaneous T-cell lymphoma) has infiltrated the area of the eyebrows and abolished the preexisting hair follicles; however, follow-up descriptions of patients after treatment of other conditions that cause eyebrow loss usually are not reported. Indeed, there was partial reappearance of the eyebrows in a woman with systemic mastocytosis–associated loss of the eyebrows after malignancy-related treatment was reinitiated and the infiltrative facial plaques that had created her leonine facies had decreased in size.⁵ It is reasonable to speculate that the eyebrows may have reappeared in the patient reported by Krooks and Weatherall¹ and his leonine facies–associated facial plaques may have resolved if he had underwent and responded to treatment with antineoplastic chemotherapy.

To the Editor:

I read with interest the informative Cutis case report by Krooks and Weatherall¹ in which the authors not only described the case of a 66-year-old man whose diagnosis of bone marrow biopsy–confirmed acute myeloid leukemia (AML) presented concurrently with skin biopsy–confirmed leukemia cutis but also discussed the poor prognosis of individuals with acute myelogenous leukemia cutis. Their patient died within 5 weeks of establishing the diagnosis. In addition, lateral and frontal photographs of the patient’s face demonstrated diffuse infiltrative plaques of leukemia cutis; he had swollen eyelids and lips with distortion of the nose secondary to dermal infiltration of leukemic myeloid cells.¹ Although not emphasized by the authors, the patient appeared to have a leonine facies and at least partial loss of the lateral eyebrows.

Malignancy-associated leonine facies resulting from infiltration of the skin by neoplastic cells has been reported in a patient with metastatic breast carcinoma.^2,3 However, it predominantly occurs in patients with hematologic dyscrasias such as leukemia cutis, lymphoma (ie, cutaneous B cell, cutaneous T cell, Hodgkin), plasmacytoma, and systemic mastocytosis.^3,4 The report by Krooks and Weatherall¹ adds AML-associated leukemia cutis to the previously observed types of leukemia cutis–related leonine facies in patients with acute lymphocytic leukemia, acute myelomonocytic leukemia, and chronic lymphocytic leukemia.^3,4

Partial or complete loss of eyebrows in the setting of leonine facies has a limited differential diagnosis.^3,5 In addition to cancer, the associated disorders include adnexal mucin deposition (alopecia mucinosis), granulomatous conditions (sarcoidosis), infectious diseases (leprosy), inherited syndromes (Setleis syndrome), photoallergic dermatoses (actinic reticuloid), and viral conditions (viral-associated trichodysplasia).^3-9 Neoplasms associated with leonine facies and eyebrow loss include lymphomas (mycosis fungoides and unspecified cutaneous T-cell lymphoma), systemic mastocytosis and leukemia cutis secondary to acute lymphocytic leukemia, acute myelomonocytic leukemia, and now AML.^1,3-5

The eyebrow loss associated with leonine facies often is not reversible once the causative cell of the associated condition (eg, granulomas of mycobacteria-infected histiocytes in leprosy, neoplastic lymphocytes in cutaneous T-cell lymphoma) has infiltrated the area of the eyebrows and abolished the preexisting hair follicles; however, follow-up descriptions of patients after treatment of other conditions that cause eyebrow loss usually are not reported. Indeed, there was partial reappearance of the eyebrows in a woman with systemic mastocytosis–associated loss of the eyebrows after malignancy-related treatment was reinitiated and the infiltrative facial plaques that had created her leonine facies had decreased in size.⁵ It is reasonable to speculate that the eyebrows may have reappeared in the patient reported by Krooks and Weatherall¹ and his leonine facies–associated facial plaques may have resolved if he had underwent and responded to treatment with antineoplastic chemotherapy.

To the Editor:

I read with interest the informative Cutis case report by Krooks and Weatherall¹ in which the authors not only described the case of a 66-year-old man whose diagnosis of bone marrow biopsy–confirmed acute myeloid leukemia (AML) presented concurrently with skin biopsy–confirmed leukemia cutis but also discussed the poor prognosis of individuals with acute myelogenous leukemia cutis. Their patient died within 5 weeks of establishing the diagnosis. In addition, lateral and frontal photographs of the patient’s face demonstrated diffuse infiltrative plaques of leukemia cutis; he had swollen eyelids and lips with distortion of the nose secondary to dermal infiltration of leukemic myeloid cells.¹ Although not emphasized by the authors, the patient appeared to have a leonine facies and at least partial loss of the lateral eyebrows.

Malignancy-associated leonine facies resulting from infiltration of the skin by neoplastic cells has been reported in a patient with metastatic breast carcinoma.^2,3 However, it predominantly occurs in patients with hematologic dyscrasias such as leukemia cutis, lymphoma (ie, cutaneous B cell, cutaneous T cell, Hodgkin), plasmacytoma, and systemic mastocytosis.^3,4 The report by Krooks and Weatherall¹ adds AML-associated leukemia cutis to the previously observed types of leukemia cutis–related leonine facies in patients with acute lymphocytic leukemia, acute myelomonocytic leukemia, and chronic lymphocytic leukemia.^3,4

Partial or complete loss of eyebrows in the setting of leonine facies has a limited differential diagnosis.^3,5 In addition to cancer, the associated disorders include adnexal mucin deposition (alopecia mucinosis), granulomatous conditions (sarcoidosis), infectious diseases (leprosy), inherited syndromes (Setleis syndrome), photoallergic dermatoses (actinic reticuloid), and viral conditions (viral-associated trichodysplasia).^3-9 Neoplasms associated with leonine facies and eyebrow loss include lymphomas (mycosis fungoides and unspecified cutaneous T-cell lymphoma), systemic mastocytosis and leukemia cutis secondary to acute lymphocytic leukemia, acute myelomonocytic leukemia, and now AML.^1,3-5

The eyebrow loss associated with leonine facies often is not reversible once the causative cell of the associated condition (eg, granulomas of mycobacteria-infected histiocytes in leprosy, neoplastic lymphocytes in cutaneous T-cell lymphoma) has infiltrated the area of the eyebrows and abolished the preexisting hair follicles; however, follow-up descriptions of patients after treatment of other conditions that cause eyebrow loss usually are not reported. Indeed, there was partial reappearance of the eyebrows in a woman with systemic mastocytosis–associated loss of the eyebrows after malignancy-related treatment was reinitiated and the infiltrative facial plaques that had created her leonine facies had decreased in size.⁵ It is reasonable to speculate that the eyebrows may have reappeared in the patient reported by Krooks and Weatherall¹ and his leonine facies–associated facial plaques may have resolved if he had underwent and responded to treatment with antineoplastic chemotherapy.

To the Editor:

The tongue is composed of 4 different types of papillae: fungiform, foliate, circumvallate, and filiform. Fungiform papillae, primarily located on the tip and sides of the tongue, are mushroom-shaped epithelial elevations composed of taste buds at the upper surface overlying a core of connective tissue.¹ Foliate and circumvallate papillae are likewise associated with taste buds, while the filiform papillae are hypothesized to exclusively provide a frictional surface for proper food manipulation. Pigmented fungiform papillae of the tongue (PFPT) was first reported by Leonard² in 1905, who described discrete hyperpigmentation present only on the surface of fungiform papillae, mainly in black patients. Although they have been primarily described in black individuals, PFPT also has been occasionally reported in Asian and Middle Eastern individuals as well as Indian women.^3-6

A 36-year-old Indian man initially presented to his primary care provider with brown discoloration of the dorsolateral aspects of the tongue that had been present since childhood. His primary care provider was concerned about a potential syndrome or systemic illness and referred the patient to dermatology for further evaluation. The patient denied any oral mucosal bleeding or discomfort, and a review of systems was unremarkable. His medical and family history were otherwise noncontributory, and he denied a history of tobacco use.

Physical examination of the tongue and oral mucosa revealed numerous 0.5- to 1.0-mm brown papillae in a symmetric distribution, primarily located on the tip and lateral aspects of the tongue (Figure). No hyperpigmentation was present on the posterior aspect of the tongue or on any other mucosal surface. Routine laboratory values were notable for mild elevations in aspartate aminotransferase and alanine aminotransferase (47 U/L [reference range, 10–30 U/L] and 64 U/L [reference range, 10–40 U/L], respectively) and mild hyperbilirubinemia (total bilirubin, 1.8 mg/dL [reference range, 0.3–1.2 mg/dL]). A complete blood cell count and electrolytes were within reference range. Based on the clinical appearance of the lesions and their presence since childhood, the patient was diagnosed with PFPT. No intervention was undertaken, and the patient was reassured of the benign nature of the lesions.

Pigmented fungiform papillae of the tongue presents in 3 variants. The first variant involves hyperpigmentation of all fungiform papillae located on the lateral and frontal aspects of the tongue and is the most common manifestation of PFPT.³ Our patient falls into this category. The second and third variants involve the dorsal surface, with the former involving only a few fungiform papillae on the dorsal aspect of the tongue and the latter variant involving all papillae.³ In 1974, Holzwanger et al³ conducted a survey of 300 random individuals, finding that 30% of black women and 25% of black men had some hyperpigmentation of the tongue, while only 1 white individual demonstrated lingual pigmentation. The physiology of PFPT remains largely unknown. Dermoscopic evaluation often demonstrates elevations with pigmented borders in a rose petal shape.⁷ Histopathologic evaluation reveals melanophages without inflammation that are positive for melanin on Fontana-Masson silver staining but negative for iron on Prussian blue staining.⁸

Despite the fact that PFPT is not a rare condition, the diagnosis remains notably missing from many standard dermatology textbooks and online dermatology resources, making it a potentially overlooked clinical entity.^4-6 The tongue has a number of normal variations that are unlikely to be fully appreciated or acknowledged by dermatologists on routine physical examination but may cause distress to patients and raise concerns from primary care providers. Given that PFPT are benign, physicians should be aware of this diagnosis so as to provide reassurance to patients and avoid unnecessary testing. However, because the tongue can represent a harbinger of systemic disease, the differential diagnosis for the hyperpigmented lesions must always be considered, including Peutz-Jeghers syndrome, hemochromatosis, Addison disease, and Laugier-Hunziker syndrome (a rarer condition causing pigmented lesions on the lips, palate, and tongue), particularly if the hyperpigmented lesions extend beyond the fungiform papillae and do not fit into the 3 categories of PFPT.⁹

To the Editor:

The tongue is composed of 4 different types of papillae: fungiform, foliate, circumvallate, and filiform. Fungiform papillae, primarily located on the tip and sides of the tongue, are mushroom-shaped epithelial elevations composed of taste buds at the upper surface overlying a core of connective tissue.¹ Foliate and circumvallate papillae are likewise associated with taste buds, while the filiform papillae are hypothesized to exclusively provide a frictional surface for proper food manipulation. Pigmented fungiform papillae of the tongue (PFPT) was first reported by Leonard² in 1905, who described discrete hyperpigmentation present only on the surface of fungiform papillae, mainly in black patients. Although they have been primarily described in black individuals, PFPT also has been occasionally reported in Asian and Middle Eastern individuals as well as Indian women.^3-6

A 36-year-old Indian man initially presented to his primary care provider with brown discoloration of the dorsolateral aspects of the tongue that had been present since childhood. His primary care provider was concerned about a potential syndrome or systemic illness and referred the patient to dermatology for further evaluation. The patient denied any oral mucosal bleeding or discomfort, and a review of systems was unremarkable. His medical and family history were otherwise noncontributory, and he denied a history of tobacco use.

Physical examination of the tongue and oral mucosa revealed numerous 0.5- to 1.0-mm brown papillae in a symmetric distribution, primarily located on the tip and lateral aspects of the tongue (Figure). No hyperpigmentation was present on the posterior aspect of the tongue or on any other mucosal surface. Routine laboratory values were notable for mild elevations in aspartate aminotransferase and alanine aminotransferase (47 U/L [reference range, 10–30 U/L] and 64 U/L [reference range, 10–40 U/L], respectively) and mild hyperbilirubinemia (total bilirubin, 1.8 mg/dL [reference range, 0.3–1.2 mg/dL]). A complete blood cell count and electrolytes were within reference range. Based on the clinical appearance of the lesions and their presence since childhood, the patient was diagnosed with PFPT. No intervention was undertaken, and the patient was reassured of the benign nature of the lesions.

Pigmented fungiform papillae of the tongue presents in 3 variants. The first variant involves hyperpigmentation of all fungiform papillae located on the lateral and frontal aspects of the tongue and is the most common manifestation of PFPT.³ Our patient falls into this category. The second and third variants involve the dorsal surface, with the former involving only a few fungiform papillae on the dorsal aspect of the tongue and the latter variant involving all papillae.³ In 1974, Holzwanger et al³ conducted a survey of 300 random individuals, finding that 30% of black women and 25% of black men had some hyperpigmentation of the tongue, while only 1 white individual demonstrated lingual pigmentation. The physiology of PFPT remains largely unknown. Dermoscopic evaluation often demonstrates elevations with pigmented borders in a rose petal shape.⁷ Histopathologic evaluation reveals melanophages without inflammation that are positive for melanin on Fontana-Masson silver staining but negative for iron on Prussian blue staining.⁸

Despite the fact that PFPT is not a rare condition, the diagnosis remains notably missing from many standard dermatology textbooks and online dermatology resources, making it a potentially overlooked clinical entity.^4-6 The tongue has a number of normal variations that are unlikely to be fully appreciated or acknowledged by dermatologists on routine physical examination but may cause distress to patients and raise concerns from primary care providers. Given that PFPT are benign, physicians should be aware of this diagnosis so as to provide reassurance to patients and avoid unnecessary testing. However, because the tongue can represent a harbinger of systemic disease, the differential diagnosis for the hyperpigmented lesions must always be considered, including Peutz-Jeghers syndrome, hemochromatosis, Addison disease, and Laugier-Hunziker syndrome (a rarer condition causing pigmented lesions on the lips, palate, and tongue), particularly if the hyperpigmented lesions extend beyond the fungiform papillae and do not fit into the 3 categories of PFPT.⁹

To the Editor:

The tongue is composed of 4 different types of papillae: fungiform, foliate, circumvallate, and filiform. Fungiform papillae, primarily located on the tip and sides of the tongue, are mushroom-shaped epithelial elevations composed of taste buds at the upper surface overlying a core of connective tissue.¹ Foliate and circumvallate papillae are likewise associated with taste buds, while the filiform papillae are hypothesized to exclusively provide a frictional surface for proper food manipulation. Pigmented fungiform papillae of the tongue (PFPT) was first reported by Leonard² in 1905, who described discrete hyperpigmentation present only on the surface of fungiform papillae, mainly in black patients. Although they have been primarily described in black individuals, PFPT also has been occasionally reported in Asian and Middle Eastern individuals as well as Indian women.^3-6

A 36-year-old Indian man initially presented to his primary care provider with brown discoloration of the dorsolateral aspects of the tongue that had been present since childhood. His primary care provider was concerned about a potential syndrome or systemic illness and referred the patient to dermatology for further evaluation. The patient denied any oral mucosal bleeding or discomfort, and a review of systems was unremarkable. His medical and family history were otherwise noncontributory, and he denied a history of tobacco use.

Physical examination of the tongue and oral mucosa revealed numerous 0.5- to 1.0-mm brown papillae in a symmetric distribution, primarily located on the tip and lateral aspects of the tongue (Figure). No hyperpigmentation was present on the posterior aspect of the tongue or on any other mucosal surface. Routine laboratory values were notable for mild elevations in aspartate aminotransferase and alanine aminotransferase (47 U/L [reference range, 10–30 U/L] and 64 U/L [reference range, 10–40 U/L], respectively) and mild hyperbilirubinemia (total bilirubin, 1.8 mg/dL [reference range, 0.3–1.2 mg/dL]). A complete blood cell count and electrolytes were within reference range. Based on the clinical appearance of the lesions and their presence since childhood, the patient was diagnosed with PFPT. No intervention was undertaken, and the patient was reassured of the benign nature of the lesions.

Pigmented fungiform papillae of the tongue presents in 3 variants. The first variant involves hyperpigmentation of all fungiform papillae located on the lateral and frontal aspects of the tongue and is the most common manifestation of PFPT.³ Our patient falls into this category. The second and third variants involve the dorsal surface, with the former involving only a few fungiform papillae on the dorsal aspect of the tongue and the latter variant involving all papillae.³ In 1974, Holzwanger et al³ conducted a survey of 300 random individuals, finding that 30% of black women and 25% of black men had some hyperpigmentation of the tongue, while only 1 white individual demonstrated lingual pigmentation. The physiology of PFPT remains largely unknown. Dermoscopic evaluation often demonstrates elevations with pigmented borders in a rose petal shape.⁷ Histopathologic evaluation reveals melanophages without inflammation that are positive for melanin on Fontana-Masson silver staining but negative for iron on Prussian blue staining.⁸

Despite the fact that PFPT is not a rare condition, the diagnosis remains notably missing from many standard dermatology textbooks and online dermatology resources, making it a potentially overlooked clinical entity.^4-6 The tongue has a number of normal variations that are unlikely to be fully appreciated or acknowledged by dermatologists on routine physical examination but may cause distress to patients and raise concerns from primary care providers. Given that PFPT are benign, physicians should be aware of this diagnosis so as to provide reassurance to patients and avoid unnecessary testing. However, because the tongue can represent a harbinger of systemic disease, the differential diagnosis for the hyperpigmented lesions must always be considered, including Peutz-Jeghers syndrome, hemochromatosis, Addison disease, and Laugier-Hunziker syndrome (a rarer condition causing pigmented lesions on the lips, palate, and tongue), particularly if the hyperpigmented lesions extend beyond the fungiform papillae and do not fit into the 3 categories of PFPT.⁹