Anand Rajpara, MD

The Diagnosis: Mycobacterium marinum Infection

A repeat excisional biopsy showed suppurative granulomatous dermatitis with negative stains for infectious organisms; however, tissue culture grew Mycobacterium marinum. The patient had a history of exposure to fish tanks, which are a potential habitat for nontuberculous mycobacteria. These bacteria can enter the body through a minor laceration or cut in the skin, which was likely due to her occupation and pet care activities.¹ Her fish tank exposure combined with the cutaneous findings of a long-standing indurated plaque with proximal nodular lymphangitis made M marinum infection the most likely diagnosis.²

Due to the limited specificity and sensitivity of patient symptoms, histologic staining, and direct microscopy, the gold standard for diagnosing acid-fast bacilli is tissue culture. ³ Tissue polymerase chain reaction testing is most useful in identifying the species of mycobacteria when histologic stains identify acid-fast bacilli but repeated tissue cultures are negative.⁴ With M marinum, a high clinical suspicion is needed to acquire a positive tissue culture because it needs to be grown for several weeks and at a temperature of 30 °C.⁵ Therefore, the physician should inform the laboratory if there is any suspicion for M marinum to increase the likelihood of obtaining a positive culture.

The differential diagnosis for M marinum infection includes other skin diseases that can cause nodular lymphangitis (also known as sporotrichoid spread) such as sporotrichosis, leishmaniasis, and certain bacterial and fungal infections. Although cat scratch disease, which is caused by Bartonella henselae, can appear similar to M marinum on histopathology, it clinically manifests with a single papulovesicular lesion at the site of inoculation that then forms a central eschar and resolves within a few weeks. Cat scratch disease typically causes painful lymphadenopathy, but it does not cause nodular lymphangitis or sporotrichoid spread.⁶ Sporotrichosis can have a similar clinical and histologic manifestation to M marinum infection, but the patient history typically includes exposure to Sporothrix schenckii through gardening or other contact with thorns, plants, or soil.² Cutaneous sarcoidosis can have a similar clinical appearance to M marinum infection, but nodular lymphangitis does not occur and histopathology would demonstrate noncaseating epithelioid cell granulomas.⁷ Lastly, although vegetative pyoderma gangrenosum can have some of the same histologic findings as M marinum, it typically also demonstrates sinus tract formation, which was not present in our case. Additionally, vegetative pyoderma gangrenosum manifests with a verrucous and pustular plaque that would not have lymphocutaneous spread.⁸

Treatment of cutaneous M marinum infection is guided by antibiotic susceptibility testing. One regimen is clarithromycin (500 mg twice daily⁹) plus ethambutol. ¹⁰ Treatment often entails a multidrug combination due to the high rates of antibiotic resistance. Other antibiotics that potentially can be used include rifampin, trimethoprim-sulfamethoxazole, minocycline, and quinolones. The treatment duration typically is more than 3 months, and therapy is continued for 4 to 6 weeks after the skin lesions resolve.¹¹ Excision of the lesion is reserved for patients with M marinum infection that fails to respond to antibiotic therapy.⁵

The Diagnosis: Mycobacterium marinum Infection

A repeat excisional biopsy showed suppurative granulomatous dermatitis with negative stains for infectious organisms; however, tissue culture grew Mycobacterium marinum. The patient had a history of exposure to fish tanks, which are a potential habitat for nontuberculous mycobacteria. These bacteria can enter the body through a minor laceration or cut in the skin, which was likely due to her occupation and pet care activities.¹ Her fish tank exposure combined with the cutaneous findings of a long-standing indurated plaque with proximal nodular lymphangitis made M marinum infection the most likely diagnosis.²

Due to the limited specificity and sensitivity of patient symptoms, histologic staining, and direct microscopy, the gold standard for diagnosing acid-fast bacilli is tissue culture. ³ Tissue polymerase chain reaction testing is most useful in identifying the species of mycobacteria when histologic stains identify acid-fast bacilli but repeated tissue cultures are negative.⁴ With M marinum, a high clinical suspicion is needed to acquire a positive tissue culture because it needs to be grown for several weeks and at a temperature of 30 °C.⁵ Therefore, the physician should inform the laboratory if there is any suspicion for M marinum to increase the likelihood of obtaining a positive culture.

The differential diagnosis for M marinum infection includes other skin diseases that can cause nodular lymphangitis (also known as sporotrichoid spread) such as sporotrichosis, leishmaniasis, and certain bacterial and fungal infections. Although cat scratch disease, which is caused by Bartonella henselae, can appear similar to M marinum on histopathology, it clinically manifests with a single papulovesicular lesion at the site of inoculation that then forms a central eschar and resolves within a few weeks. Cat scratch disease typically causes painful lymphadenopathy, but it does not cause nodular lymphangitis or sporotrichoid spread.⁶ Sporotrichosis can have a similar clinical and histologic manifestation to M marinum infection, but the patient history typically includes exposure to Sporothrix schenckii through gardening or other contact with thorns, plants, or soil.² Cutaneous sarcoidosis can have a similar clinical appearance to M marinum infection, but nodular lymphangitis does not occur and histopathology would demonstrate noncaseating epithelioid cell granulomas.⁷ Lastly, although vegetative pyoderma gangrenosum can have some of the same histologic findings as M marinum, it typically also demonstrates sinus tract formation, which was not present in our case. Additionally, vegetative pyoderma gangrenosum manifests with a verrucous and pustular plaque that would not have lymphocutaneous spread.⁸

Treatment of cutaneous M marinum infection is guided by antibiotic susceptibility testing. One regimen is clarithromycin (500 mg twice daily⁹) plus ethambutol. ¹⁰ Treatment often entails a multidrug combination due to the high rates of antibiotic resistance. Other antibiotics that potentially can be used include rifampin, trimethoprim-sulfamethoxazole, minocycline, and quinolones. The treatment duration typically is more than 3 months, and therapy is continued for 4 to 6 weeks after the skin lesions resolve.¹¹ Excision of the lesion is reserved for patients with M marinum infection that fails to respond to antibiotic therapy.⁵

The Diagnosis: Mycobacterium marinum Infection

A repeat excisional biopsy showed suppurative granulomatous dermatitis with negative stains for infectious organisms; however, tissue culture grew Mycobacterium marinum. The patient had a history of exposure to fish tanks, which are a potential habitat for nontuberculous mycobacteria. These bacteria can enter the body through a minor laceration or cut in the skin, which was likely due to her occupation and pet care activities.¹ Her fish tank exposure combined with the cutaneous findings of a long-standing indurated plaque with proximal nodular lymphangitis made M marinum infection the most likely diagnosis.²

Due to the limited specificity and sensitivity of patient symptoms, histologic staining, and direct microscopy, the gold standard for diagnosing acid-fast bacilli is tissue culture. ³ Tissue polymerase chain reaction testing is most useful in identifying the species of mycobacteria when histologic stains identify acid-fast bacilli but repeated tissue cultures are negative.⁴ With M marinum, a high clinical suspicion is needed to acquire a positive tissue culture because it needs to be grown for several weeks and at a temperature of 30 °C.⁵ Therefore, the physician should inform the laboratory if there is any suspicion for M marinum to increase the likelihood of obtaining a positive culture.

The differential diagnosis for M marinum infection includes other skin diseases that can cause nodular lymphangitis (also known as sporotrichoid spread) such as sporotrichosis, leishmaniasis, and certain bacterial and fungal infections. Although cat scratch disease, which is caused by Bartonella henselae, can appear similar to M marinum on histopathology, it clinically manifests with a single papulovesicular lesion at the site of inoculation that then forms a central eschar and resolves within a few weeks. Cat scratch disease typically causes painful lymphadenopathy, but it does not cause nodular lymphangitis or sporotrichoid spread.⁶ Sporotrichosis can have a similar clinical and histologic manifestation to M marinum infection, but the patient history typically includes exposure to Sporothrix schenckii through gardening or other contact with thorns, plants, or soil.² Cutaneous sarcoidosis can have a similar clinical appearance to M marinum infection, but nodular lymphangitis does not occur and histopathology would demonstrate noncaseating epithelioid cell granulomas.⁷ Lastly, although vegetative pyoderma gangrenosum can have some of the same histologic findings as M marinum, it typically also demonstrates sinus tract formation, which was not present in our case. Additionally, vegetative pyoderma gangrenosum manifests with a verrucous and pustular plaque that would not have lymphocutaneous spread.⁸

Treatment of cutaneous M marinum infection is guided by antibiotic susceptibility testing. One regimen is clarithromycin (500 mg twice daily⁹) plus ethambutol. ¹⁰ Treatment often entails a multidrug combination due to the high rates of antibiotic resistance. Other antibiotics that potentially can be used include rifampin, trimethoprim-sulfamethoxazole, minocycline, and quinolones. The treatment duration typically is more than 3 months, and therapy is continued for 4 to 6 weeks after the skin lesions resolve.¹¹ Excision of the lesion is reserved for patients with M marinum infection that fails to respond to antibiotic therapy.⁵

The Diagnosis: Majocchi Granuloma

Histopathology showed rare follicular-based organisms highlighted by periodic acid–Schiff staining. This finding along with her use of clobetasol ointment on the hands led to a diagnosis of Majocchi granuloma in our patient. Clobetasol and crisaborole ointments were discontinued, and she was started on oral terbinafine 250 mg daily for 4 weeks, which resulted in resolution of the rash.

Majocchi granuloma (also known as nodular granulomatous perifolliculitis) is a perifollicular granulomatous process caused by a dermatophyte infection of the hair follicles. Trichophyton rubrum is the most commonly implicated organism, followed by Trichophyton mentagrophytes and Epidermophyton floccosum, which also cause tinea corporis and tinea pedis.¹ This condition most commonly occurs in women aged 20 to 35 years. Risk factors include trauma, occlusion of the hair follicles, immunosuppression, and use of potent topical corticosteroids in patients with tinea.^2,3 Immunocompetent patients present with perifollicular papules or pustules with erythematous scaly plaques on the extremities, while immunocompromised patients may have subcutaneous nodules or abscesses on any hair-bearing parts of the body.³

Majocchi granuloma is considered a dermal fungal infection in which the disruption of hair follicles from occlusion or trauma allows fungal organisms and keratinaceous material substrates to be introduced into the dermis. The differential diagnosis is based on the types of presenting lesions. The papules of Majocchi granuloma can resemble folliculitis, acne, or insect bites, while nodules can resemble erythema nodosum or furunculosis.⁴ Plaques, such as those seen in our patient, can mimic cellulitis and allergic or irritant contact dermatitis.⁴ Additionally, the plaques may appear annular or figurate, which may resemble erythema gyratum repens or erythema annulare centrifugum.

The diagnosis of Majocchi granuloma often requires fungal culture and biopsy because a potassium hydroxide preparation is unable to distinguish between superficial and invasive dermatophytes.³ Histopathology will show perifollicular granulomatous inflammation. Fungal elements can be detected with periodic acid–Schiff or Grocott-Gomori methenamine-silver staining of the hairs and hair follicles as well as dermal infiltrates.⁴

Topical corticosteroids should be discontinued. Systemic antifungals are the treatment of choice for Majocchi granuloma, as topical antifungals are not effective against deep fungal infections. Although there are no standard guidelines on duration or dosage, recommended regimens in immunocompetent patients include terbinafine 250 mg/d for 4 weeks; itraconazole pulse therapy consisting of 200 mg twice daily for 1 week with 2 weeks off therapy, then repeat the cycle for a total of 2 to 3 pulses; and griseofulvin 500 mg twice daily for 8 to 12 weeks (Table).³ For immunocompromised patients, combination therapy with more than one antifungal may be necessary.

The Diagnosis: Majocchi Granuloma

Histopathology showed rare follicular-based organisms highlighted by periodic acid–Schiff staining. This finding along with her use of clobetasol ointment on the hands led to a diagnosis of Majocchi granuloma in our patient. Clobetasol and crisaborole ointments were discontinued, and she was started on oral terbinafine 250 mg daily for 4 weeks, which resulted in resolution of the rash.

Majocchi granuloma (also known as nodular granulomatous perifolliculitis) is a perifollicular granulomatous process caused by a dermatophyte infection of the hair follicles. Trichophyton rubrum is the most commonly implicated organism, followed by Trichophyton mentagrophytes and Epidermophyton floccosum, which also cause tinea corporis and tinea pedis.¹ This condition most commonly occurs in women aged 20 to 35 years. Risk factors include trauma, occlusion of the hair follicles, immunosuppression, and use of potent topical corticosteroids in patients with tinea.^2,3 Immunocompetent patients present with perifollicular papules or pustules with erythematous scaly plaques on the extremities, while immunocompromised patients may have subcutaneous nodules or abscesses on any hair-bearing parts of the body.³

Majocchi granuloma is considered a dermal fungal infection in which the disruption of hair follicles from occlusion or trauma allows fungal organisms and keratinaceous material substrates to be introduced into the dermis. The differential diagnosis is based on the types of presenting lesions. The papules of Majocchi granuloma can resemble folliculitis, acne, or insect bites, while nodules can resemble erythema nodosum or furunculosis.⁴ Plaques, such as those seen in our patient, can mimic cellulitis and allergic or irritant contact dermatitis.⁴ Additionally, the plaques may appear annular or figurate, which may resemble erythema gyratum repens or erythema annulare centrifugum.

The diagnosis of Majocchi granuloma often requires fungal culture and biopsy because a potassium hydroxide preparation is unable to distinguish between superficial and invasive dermatophytes.³ Histopathology will show perifollicular granulomatous inflammation. Fungal elements can be detected with periodic acid–Schiff or Grocott-Gomori methenamine-silver staining of the hairs and hair follicles as well as dermal infiltrates.⁴

Topical corticosteroids should be discontinued. Systemic antifungals are the treatment of choice for Majocchi granuloma, as topical antifungals are not effective against deep fungal infections. Although there are no standard guidelines on duration or dosage, recommended regimens in immunocompetent patients include terbinafine 250 mg/d for 4 weeks; itraconazole pulse therapy consisting of 200 mg twice daily for 1 week with 2 weeks off therapy, then repeat the cycle for a total of 2 to 3 pulses; and griseofulvin 500 mg twice daily for 8 to 12 weeks (Table).³ For immunocompromised patients, combination therapy with more than one antifungal may be necessary.

The Diagnosis: Majocchi Granuloma

Histopathology showed rare follicular-based organisms highlighted by periodic acid–Schiff staining. This finding along with her use of clobetasol ointment on the hands led to a diagnosis of Majocchi granuloma in our patient. Clobetasol and crisaborole ointments were discontinued, and she was started on oral terbinafine 250 mg daily for 4 weeks, which resulted in resolution of the rash.

Majocchi granuloma (also known as nodular granulomatous perifolliculitis) is a perifollicular granulomatous process caused by a dermatophyte infection of the hair follicles. Trichophyton rubrum is the most commonly implicated organism, followed by Trichophyton mentagrophytes and Epidermophyton floccosum, which also cause tinea corporis and tinea pedis.¹ This condition most commonly occurs in women aged 20 to 35 years. Risk factors include trauma, occlusion of the hair follicles, immunosuppression, and use of potent topical corticosteroids in patients with tinea.^2,3 Immunocompetent patients present with perifollicular papules or pustules with erythematous scaly plaques on the extremities, while immunocompromised patients may have subcutaneous nodules or abscesses on any hair-bearing parts of the body.³

Majocchi granuloma is considered a dermal fungal infection in which the disruption of hair follicles from occlusion or trauma allows fungal organisms and keratinaceous material substrates to be introduced into the dermis. The differential diagnosis is based on the types of presenting lesions. The papules of Majocchi granuloma can resemble folliculitis, acne, or insect bites, while nodules can resemble erythema nodosum or furunculosis.⁴ Plaques, such as those seen in our patient, can mimic cellulitis and allergic or irritant contact dermatitis.⁴ Additionally, the plaques may appear annular or figurate, which may resemble erythema gyratum repens or erythema annulare centrifugum.

The diagnosis of Majocchi granuloma often requires fungal culture and biopsy because a potassium hydroxide preparation is unable to distinguish between superficial and invasive dermatophytes.³ Histopathology will show perifollicular granulomatous inflammation. Fungal elements can be detected with periodic acid–Schiff or Grocott-Gomori methenamine-silver staining of the hairs and hair follicles as well as dermal infiltrates.⁴

Topical corticosteroids should be discontinued. Systemic antifungals are the treatment of choice for Majocchi granuloma, as topical antifungals are not effective against deep fungal infections. Although there are no standard guidelines on duration or dosage, recommended regimens in immunocompetent patients include terbinafine 250 mg/d for 4 weeks; itraconazole pulse therapy consisting of 200 mg twice daily for 1 week with 2 weeks off therapy, then repeat the cycle for a total of 2 to 3 pulses; and griseofulvin 500 mg twice daily for 8 to 12 weeks (Table).³ For immunocompromised patients, combination therapy with more than one antifungal may be necessary.

The Diagnosis: Immunotherapy-Related Lichenoid Drug Eruption

Direct immunofluorescence was negative, and histopathology revealed a lichenoid interface dermatitis, minimal parakeratosis, and saw-toothed rete ridges (Figure 1). He was diagnosed with an immunotherapyrelated lichenoid drug eruption based on the morphology of the skin lesions and clinicopathologic correlation. Bullous pemphigoid and lichen planus pemphigoides were ruled out given the negative direct immunofluorescence findings. Stevens-Johnson syndrome (SJS)/toxic epidermal necrolysis (TEN) was not consistent with the clinical presentation, especially given the lack of mucosal findings. The histology also was not consistent, as the biopsy specimen lacked apoptotic and necrotic keratinocytes to the degree seen in SJS/TEN and also had a greater degree of inflammatory infiltrate. Drug reaction with eosinophilia and systemic symptoms (DRESS) syndrome was ruled out given the lack of systemic findings, including facial swelling and lymphadenopathy and the clinical appearance of the rash. No morbilliform features were present, which is the most common presentation of DRESS syndrome.

Checkpoint inhibitor (CPI) therapy has become the cornerstone in management of certain advanced malignancies.¹ Checkpoint inhibitors block cytotoxic T lymphocyte–associated protein 4, programmed cell death-1, and/or programmed cell death ligand-1, allowing activated T cells to infiltrate the tumor microenvironment and destroy malignant cells. Checkpoint inhibitors are approved for the treatment of melanoma, cutaneous squamous cell carcinoma, and Merkel cell carcinoma and are being investigated in various other cutaneous and soft tissue malignancies.^1-3

Although CPIs have shown substantial efficacy in the management of advanced malignancies, immune-related adverse events (AEs) are common due to nonspecific immune activation.² Immune-related cutaneous AEs are the most common immune-related AEs, occurring in 30% to 50% of patients who undergo treatment.^2-5 Common immune-related cutaneous AEs include maculopapular, psoriasiform, and lichenoid dermatitis, as well as pruritus without dermatitis.^2,3,6 Other reactions include but are not limited to bullous pemphigoid, vitiligolike depigmentation, and alopecia.^2,3 Immune-related cutaneous AEs usually are self-limited; however, severe life-threatening reactions such as the spectrum of SJS/TEN and DRESS syndrome also can occur.^2-4 Immune-related cutaneous AEs are graded based on the Common Terminology Criteria for Adverse Events: grade 1 reactions are asymptomatic and cover less than 10% of the patient’s body surface area (BSA), grade 2 reactions have mild symptoms and cover 10% to 30% of the patient’s BSA, grade 3 reactions have moderate to severe symptoms and cover greater than 30% of the patient’s BSA, and grade 4 reactions are life-threatening.^2,3 With prompt recognition and adequate treatment, mild to moderate immune-related cutaneous AEs—grades 1 and 2—largely are reversible, and less than 5% require discontinuation of therapy.^2,3,6 It has been suggested that immune-related cutaneous AEs may be a positive prognostic factor in the treatment of underlying malignancy, indicating adequate immune activation targeting the malignant cells.⁶

Although our patient had some typical violaceous, flat-topped papules and plaques with Wickham striae, he also had atypical findings for a lichenoid reaction. Given the endorsement of blisters, it is possible that some of these lesions initially were bullous and subsequently ruptured, leaving behind erosions. However, in other areas, there also were eroded papules and ulcerations without a reported history of excoriation, scratching, picking, or prior bullae, including difficult-to-reach areas such as the back. It is favored that these lesions represented a robust lichenoid dermatitis leading to erosive and ulcerated lesions, similar to the formation of bullous lichen planus. Lichenoid eruptions secondary to immunotherapy are well-known phenomena, but a PubMed search of articles indexed for MEDLINE using the terms ulcer, lichenoid, and immunotherapy revealed only 2 cases of ulcerative lichenoid eruptions: a localized digital erosive lichenoid dermatitis and a widespread ulcerative lichenoid drug eruption without true erosions.7,8 However, widespread erosive and ulcerated lichenoid reactions are rare.

Lichenoid eruptions most strongly are associated with anti–programmed cell death-1/ programmed cell death ligand-1 therapy, occurring in 20% of patients undergoing treatment.³ Lichenoid eruptions present as discrete, pruritic, erythematous, violaceous papules and plaques on the chest and back and rarely may involve the limbs, palmoplantar surfaces, and oral mucosa.^2,3,6 Histopathologic features include a dense bandlike lymphocytic infiltrate in the dermis with scattered apoptotic keratinocytes in the basal layer of the epidermis.^2,4,6 Grades 1 to 2 lesions can be managed with high-potency topical corticosteroids without CPI dose interruption, with more extensive grade 2 lesions requiring systemic corticosteroids.^2,6,9 Lichenoid eruptions grade 3 or higher also require systemic corticosteroid therapy CPI therapy cessation until the eruption has receded to grade 0 to 1.² Alternative treatment options for high-grade toxicity include phototherapy and acitretin.^2,4,9

Our patient was treated with cessation of immunotherapy and initiation of a systemic corticosteroid taper, acitretin, and narrowband UVB therapy. After 6 weeks of treatment, the pain and pruritus improved and the rash had resolved in some areas while it had taken on a more classic lichenoid appearance with violaceous scaly papules and plaques (Figure 2) in areas of prior ulcers and erosions. He no longer had any bullae, erosions, or ulcers.

The Diagnosis: Immunotherapy-Related Lichenoid Drug Eruption

Direct immunofluorescence was negative, and histopathology revealed a lichenoid interface dermatitis, minimal parakeratosis, and saw-toothed rete ridges (Figure 1). He was diagnosed with an immunotherapyrelated lichenoid drug eruption based on the morphology of the skin lesions and clinicopathologic correlation. Bullous pemphigoid and lichen planus pemphigoides were ruled out given the negative direct immunofluorescence findings. Stevens-Johnson syndrome (SJS)/toxic epidermal necrolysis (TEN) was not consistent with the clinical presentation, especially given the lack of mucosal findings. The histology also was not consistent, as the biopsy specimen lacked apoptotic and necrotic keratinocytes to the degree seen in SJS/TEN and also had a greater degree of inflammatory infiltrate. Drug reaction with eosinophilia and systemic symptoms (DRESS) syndrome was ruled out given the lack of systemic findings, including facial swelling and lymphadenopathy and the clinical appearance of the rash. No morbilliform features were present, which is the most common presentation of DRESS syndrome.

Checkpoint inhibitor (CPI) therapy has become the cornerstone in management of certain advanced malignancies.¹ Checkpoint inhibitors block cytotoxic T lymphocyte–associated protein 4, programmed cell death-1, and/or programmed cell death ligand-1, allowing activated T cells to infiltrate the tumor microenvironment and destroy malignant cells. Checkpoint inhibitors are approved for the treatment of melanoma, cutaneous squamous cell carcinoma, and Merkel cell carcinoma and are being investigated in various other cutaneous and soft tissue malignancies.^1-3

Although CPIs have shown substantial efficacy in the management of advanced malignancies, immune-related adverse events (AEs) are common due to nonspecific immune activation.² Immune-related cutaneous AEs are the most common immune-related AEs, occurring in 30% to 50% of patients who undergo treatment.^2-5 Common immune-related cutaneous AEs include maculopapular, psoriasiform, and lichenoid dermatitis, as well as pruritus without dermatitis.^2,3,6 Other reactions include but are not limited to bullous pemphigoid, vitiligolike depigmentation, and alopecia.^2,3 Immune-related cutaneous AEs usually are self-limited; however, severe life-threatening reactions such as the spectrum of SJS/TEN and DRESS syndrome also can occur.^2-4 Immune-related cutaneous AEs are graded based on the Common Terminology Criteria for Adverse Events: grade 1 reactions are asymptomatic and cover less than 10% of the patient’s body surface area (BSA), grade 2 reactions have mild symptoms and cover 10% to 30% of the patient’s BSA, grade 3 reactions have moderate to severe symptoms and cover greater than 30% of the patient’s BSA, and grade 4 reactions are life-threatening.^2,3 With prompt recognition and adequate treatment, mild to moderate immune-related cutaneous AEs—grades 1 and 2—largely are reversible, and less than 5% require discontinuation of therapy.^2,3,6 It has been suggested that immune-related cutaneous AEs may be a positive prognostic factor in the treatment of underlying malignancy, indicating adequate immune activation targeting the malignant cells.⁶

Although our patient had some typical violaceous, flat-topped papules and plaques with Wickham striae, he also had atypical findings for a lichenoid reaction. Given the endorsement of blisters, it is possible that some of these lesions initially were bullous and subsequently ruptured, leaving behind erosions. However, in other areas, there also were eroded papules and ulcerations without a reported history of excoriation, scratching, picking, or prior bullae, including difficult-to-reach areas such as the back. It is favored that these lesions represented a robust lichenoid dermatitis leading to erosive and ulcerated lesions, similar to the formation of bullous lichen planus. Lichenoid eruptions secondary to immunotherapy are well-known phenomena, but a PubMed search of articles indexed for MEDLINE using the terms ulcer, lichenoid, and immunotherapy revealed only 2 cases of ulcerative lichenoid eruptions: a localized digital erosive lichenoid dermatitis and a widespread ulcerative lichenoid drug eruption without true erosions.7,8 However, widespread erosive and ulcerated lichenoid reactions are rare.

Lichenoid eruptions most strongly are associated with anti–programmed cell death-1/ programmed cell death ligand-1 therapy, occurring in 20% of patients undergoing treatment.³ Lichenoid eruptions present as discrete, pruritic, erythematous, violaceous papules and plaques on the chest and back and rarely may involve the limbs, palmoplantar surfaces, and oral mucosa.^2,3,6 Histopathologic features include a dense bandlike lymphocytic infiltrate in the dermis with scattered apoptotic keratinocytes in the basal layer of the epidermis.^2,4,6 Grades 1 to 2 lesions can be managed with high-potency topical corticosteroids without CPI dose interruption, with more extensive grade 2 lesions requiring systemic corticosteroids.^2,6,9 Lichenoid eruptions grade 3 or higher also require systemic corticosteroid therapy CPI therapy cessation until the eruption has receded to grade 0 to 1.² Alternative treatment options for high-grade toxicity include phototherapy and acitretin.^2,4,9

Our patient was treated with cessation of immunotherapy and initiation of a systemic corticosteroid taper, acitretin, and narrowband UVB therapy. After 6 weeks of treatment, the pain and pruritus improved and the rash had resolved in some areas while it had taken on a more classic lichenoid appearance with violaceous scaly papules and plaques (Figure 2) in areas of prior ulcers and erosions. He no longer had any bullae, erosions, or ulcers.

The Diagnosis: Immunotherapy-Related Lichenoid Drug Eruption

Direct immunofluorescence was negative, and histopathology revealed a lichenoid interface dermatitis, minimal parakeratosis, and saw-toothed rete ridges (Figure 1). He was diagnosed with an immunotherapyrelated lichenoid drug eruption based on the morphology of the skin lesions and clinicopathologic correlation. Bullous pemphigoid and lichen planus pemphigoides were ruled out given the negative direct immunofluorescence findings. Stevens-Johnson syndrome (SJS)/toxic epidermal necrolysis (TEN) was not consistent with the clinical presentation, especially given the lack of mucosal findings. The histology also was not consistent, as the biopsy specimen lacked apoptotic and necrotic keratinocytes to the degree seen in SJS/TEN and also had a greater degree of inflammatory infiltrate. Drug reaction with eosinophilia and systemic symptoms (DRESS) syndrome was ruled out given the lack of systemic findings, including facial swelling and lymphadenopathy and the clinical appearance of the rash. No morbilliform features were present, which is the most common presentation of DRESS syndrome.

Checkpoint inhibitor (CPI) therapy has become the cornerstone in management of certain advanced malignancies.¹ Checkpoint inhibitors block cytotoxic T lymphocyte–associated protein 4, programmed cell death-1, and/or programmed cell death ligand-1, allowing activated T cells to infiltrate the tumor microenvironment and destroy malignant cells. Checkpoint inhibitors are approved for the treatment of melanoma, cutaneous squamous cell carcinoma, and Merkel cell carcinoma and are being investigated in various other cutaneous and soft tissue malignancies.^1-3

Although CPIs have shown substantial efficacy in the management of advanced malignancies, immune-related adverse events (AEs) are common due to nonspecific immune activation.² Immune-related cutaneous AEs are the most common immune-related AEs, occurring in 30% to 50% of patients who undergo treatment.^2-5 Common immune-related cutaneous AEs include maculopapular, psoriasiform, and lichenoid dermatitis, as well as pruritus without dermatitis.^2,3,6 Other reactions include but are not limited to bullous pemphigoid, vitiligolike depigmentation, and alopecia.^2,3 Immune-related cutaneous AEs usually are self-limited; however, severe life-threatening reactions such as the spectrum of SJS/TEN and DRESS syndrome also can occur.^2-4 Immune-related cutaneous AEs are graded based on the Common Terminology Criteria for Adverse Events: grade 1 reactions are asymptomatic and cover less than 10% of the patient’s body surface area (BSA), grade 2 reactions have mild symptoms and cover 10% to 30% of the patient’s BSA, grade 3 reactions have moderate to severe symptoms and cover greater than 30% of the patient’s BSA, and grade 4 reactions are life-threatening.^2,3 With prompt recognition and adequate treatment, mild to moderate immune-related cutaneous AEs—grades 1 and 2—largely are reversible, and less than 5% require discontinuation of therapy.^2,3,6 It has been suggested that immune-related cutaneous AEs may be a positive prognostic factor in the treatment of underlying malignancy, indicating adequate immune activation targeting the malignant cells.⁶

Although our patient had some typical violaceous, flat-topped papules and plaques with Wickham striae, he also had atypical findings for a lichenoid reaction. Given the endorsement of blisters, it is possible that some of these lesions initially were bullous and subsequently ruptured, leaving behind erosions. However, in other areas, there also were eroded papules and ulcerations without a reported history of excoriation, scratching, picking, or prior bullae, including difficult-to-reach areas such as the back. It is favored that these lesions represented a robust lichenoid dermatitis leading to erosive and ulcerated lesions, similar to the formation of bullous lichen planus. Lichenoid eruptions secondary to immunotherapy are well-known phenomena, but a PubMed search of articles indexed for MEDLINE using the terms ulcer, lichenoid, and immunotherapy revealed only 2 cases of ulcerative lichenoid eruptions: a localized digital erosive lichenoid dermatitis and a widespread ulcerative lichenoid drug eruption without true erosions.7,8 However, widespread erosive and ulcerated lichenoid reactions are rare.

Lichenoid eruptions most strongly are associated with anti–programmed cell death-1/ programmed cell death ligand-1 therapy, occurring in 20% of patients undergoing treatment.³ Lichenoid eruptions present as discrete, pruritic, erythematous, violaceous papules and plaques on the chest and back and rarely may involve the limbs, palmoplantar surfaces, and oral mucosa.^2,3,6 Histopathologic features include a dense bandlike lymphocytic infiltrate in the dermis with scattered apoptotic keratinocytes in the basal layer of the epidermis.^2,4,6 Grades 1 to 2 lesions can be managed with high-potency topical corticosteroids without CPI dose interruption, with more extensive grade 2 lesions requiring systemic corticosteroids.^2,6,9 Lichenoid eruptions grade 3 or higher also require systemic corticosteroid therapy CPI therapy cessation until the eruption has receded to grade 0 to 1.² Alternative treatment options for high-grade toxicity include phototherapy and acitretin.^2,4,9

Our patient was treated with cessation of immunotherapy and initiation of a systemic corticosteroid taper, acitretin, and narrowband UVB therapy. After 6 weeks of treatment, the pain and pruritus improved and the rash had resolved in some areas while it had taken on a more classic lichenoid appearance with violaceous scaly papules and plaques (Figure 2) in areas of prior ulcers and erosions. He no longer had any bullae, erosions, or ulcers.

The Diagnosis: Dowling-Degos Disease

Histopathology demonstrated elongation of the epidermal rete ridges with increased basal pigmentation, suprapapillary epithelial thinning, dermal melanophages, and a mild lymphocytic infiltrate (Figure). Given the clinical and histologic findings, a diagnosis of Dowling-Degos disease (DDD) was made. The patient was counseled on the increased risk for her children developing DDD. Treatment with the erbium:YAG (Er:YAG) laser subsequently was initiated.

Dowling-Degos disease (also known as reticulate pigmented anomaly of the flexures) is an uncommon autosomal-dominant condition characterized by reticular hyperpigmentation involving the flexural and intertriginous sites. Classic DDD commonly is caused by lossof-function mutations in the keratin 5 gene, KRT5¹; however, DDD also may result from loss-of-function mutations in the protein O-fucosyltransferase 1, POFUT1, and protein O-glucosyltransferase 1, POGLUT1, genes.²

Rare cases of DDD associated with hidradenitis suppurativa are caused by mutations in the presenilin enhancer protein 2 gene, PSENEN.³

Of note, a missense mutation in KRT5 is implicated in epidermolysis bullosa simplex with mottled pigmentation. Onset of DDD typically occurs during the third to fourth decades of life. Reticulated hyperpigmented macules initially occur in the axillae and groin and progressively increase over time to involve the neck, inframammary folds, trunk, and flexural surfaces of the arms and thighs. Patients additionally may present with pitted perioral scars, comedolike lesions on the back and neck, epidermoid cysts, and hidradenitis suppurativa. Keratoacanthoma and squamous cell carcinoma rarely have been reported in association with classic DDD.^4,5

Dowling-Degos disease usually is asymptomatic, though pruritus seldom may occur in the affected flexural areas. Histologically, the epidermal rete ridges are elongated in a filiform or antlerlike pattern with increased pigmentation of the basal layer and thinning of the suprapapillary epithelium. Dermal melanosis and a mild perivascular lymphohistiocytic infiltrate also are present with no increase in the number of melanocytes.^6,7 Galli-Galli disease is a variant of DDD that shares similar clinical and histologic features of DDD but is distinguished from DDD by suprabasilar nondyskeratotic acantholysis on histology.⁸

Regarding other differential diagnoses for our patient, acanthosis nigricans may be distinguished clinically by the presence of velvety and/or verrucous plaques, commonly in the neck folds and axillae. Histologically, acanthosis nigricans is distinct from DDD and involves hyperkeratosis, acanthosis, and epidermal papillomatosis. Our patient had no history of diabetes mellitus or insulin resistance. Granular parakeratosis presents with hyperpigmented hyperkeratotic papules and plaques classically confined to the axillary region; however, the involvement of other intertriginous areas may occur. Histologically, granular parakeratosis demonstrates compact parakeratosis with small bluish keratohyalin granules within the stratum corneum. Confluent and reticulated papillomatosis presents with red-brown keratotic papules that initially appear in the intermammary region and spread laterally forming a reticulated pattern. Histology is similar to acanthosis nigricans and demonstrates hyperkeratosis, acanthosis, and papillomatosis. Inverse psoriasis presents with symmetric and sharply demarcated, erythematous, nonscaly plaques in the intertriginous areas. The plaques of inverse psoriasis may be pruritic and/or sore and occasionally may become macerated. Inverse psoriasis shares similar histologic findings compared to classic plaque psoriasis but may have less confluent parakeratosis.

Treatment of DDD essentially is reserved for cosmetic reasons. Topical hydroquinone, tretinoin, and corticosteroids have been used with limited to no success.^5,9 Beneficial results after treatment with the Er:YAG laser have been reported.¹⁰

The Diagnosis: Dowling-Degos Disease

Histopathology demonstrated elongation of the epidermal rete ridges with increased basal pigmentation, suprapapillary epithelial thinning, dermal melanophages, and a mild lymphocytic infiltrate (Figure). Given the clinical and histologic findings, a diagnosis of Dowling-Degos disease (DDD) was made. The patient was counseled on the increased risk for her children developing DDD. Treatment with the erbium:YAG (Er:YAG) laser subsequently was initiated.

Dowling-Degos disease (also known as reticulate pigmented anomaly of the flexures) is an uncommon autosomal-dominant condition characterized by reticular hyperpigmentation involving the flexural and intertriginous sites. Classic DDD commonly is caused by lossof-function mutations in the keratin 5 gene, KRT5¹; however, DDD also may result from loss-of-function mutations in the protein O-fucosyltransferase 1, POFUT1, and protein O-glucosyltransferase 1, POGLUT1, genes.²

Rare cases of DDD associated with hidradenitis suppurativa are caused by mutations in the presenilin enhancer protein 2 gene, PSENEN.³

Of note, a missense mutation in KRT5 is implicated in epidermolysis bullosa simplex with mottled pigmentation. Onset of DDD typically occurs during the third to fourth decades of life. Reticulated hyperpigmented macules initially occur in the axillae and groin and progressively increase over time to involve the neck, inframammary folds, trunk, and flexural surfaces of the arms and thighs. Patients additionally may present with pitted perioral scars, comedolike lesions on the back and neck, epidermoid cysts, and hidradenitis suppurativa. Keratoacanthoma and squamous cell carcinoma rarely have been reported in association with classic DDD.^4,5

Dowling-Degos disease usually is asymptomatic, though pruritus seldom may occur in the affected flexural areas. Histologically, the epidermal rete ridges are elongated in a filiform or antlerlike pattern with increased pigmentation of the basal layer and thinning of the suprapapillary epithelium. Dermal melanosis and a mild perivascular lymphohistiocytic infiltrate also are present with no increase in the number of melanocytes.^6,7 Galli-Galli disease is a variant of DDD that shares similar clinical and histologic features of DDD but is distinguished from DDD by suprabasilar nondyskeratotic acantholysis on histology.⁸

Regarding other differential diagnoses for our patient, acanthosis nigricans may be distinguished clinically by the presence of velvety and/or verrucous plaques, commonly in the neck folds and axillae. Histologically, acanthosis nigricans is distinct from DDD and involves hyperkeratosis, acanthosis, and epidermal papillomatosis. Our patient had no history of diabetes mellitus or insulin resistance. Granular parakeratosis presents with hyperpigmented hyperkeratotic papules and plaques classically confined to the axillary region; however, the involvement of other intertriginous areas may occur. Histologically, granular parakeratosis demonstrates compact parakeratosis with small bluish keratohyalin granules within the stratum corneum. Confluent and reticulated papillomatosis presents with red-brown keratotic papules that initially appear in the intermammary region and spread laterally forming a reticulated pattern. Histology is similar to acanthosis nigricans and demonstrates hyperkeratosis, acanthosis, and papillomatosis. Inverse psoriasis presents with symmetric and sharply demarcated, erythematous, nonscaly plaques in the intertriginous areas. The plaques of inverse psoriasis may be pruritic and/or sore and occasionally may become macerated. Inverse psoriasis shares similar histologic findings compared to classic plaque psoriasis but may have less confluent parakeratosis.

Treatment of DDD essentially is reserved for cosmetic reasons. Topical hydroquinone, tretinoin, and corticosteroids have been used with limited to no success.^5,9 Beneficial results after treatment with the Er:YAG laser have been reported.¹⁰

The Diagnosis: Dowling-Degos Disease

Histopathology demonstrated elongation of the epidermal rete ridges with increased basal pigmentation, suprapapillary epithelial thinning, dermal melanophages, and a mild lymphocytic infiltrate (Figure). Given the clinical and histologic findings, a diagnosis of Dowling-Degos disease (DDD) was made. The patient was counseled on the increased risk for her children developing DDD. Treatment with the erbium:YAG (Er:YAG) laser subsequently was initiated.

Dowling-Degos disease (also known as reticulate pigmented anomaly of the flexures) is an uncommon autosomal-dominant condition characterized by reticular hyperpigmentation involving the flexural and intertriginous sites. Classic DDD commonly is caused by lossof-function mutations in the keratin 5 gene, KRT5¹; however, DDD also may result from loss-of-function mutations in the protein O-fucosyltransferase 1, POFUT1, and protein O-glucosyltransferase 1, POGLUT1, genes.²

Rare cases of DDD associated with hidradenitis suppurativa are caused by mutations in the presenilin enhancer protein 2 gene, PSENEN.³

Of note, a missense mutation in KRT5 is implicated in epidermolysis bullosa simplex with mottled pigmentation. Onset of DDD typically occurs during the third to fourth decades of life. Reticulated hyperpigmented macules initially occur in the axillae and groin and progressively increase over time to involve the neck, inframammary folds, trunk, and flexural surfaces of the arms and thighs. Patients additionally may present with pitted perioral scars, comedolike lesions on the back and neck, epidermoid cysts, and hidradenitis suppurativa. Keratoacanthoma and squamous cell carcinoma rarely have been reported in association with classic DDD.^4,5

Dowling-Degos disease usually is asymptomatic, though pruritus seldom may occur in the affected flexural areas. Histologically, the epidermal rete ridges are elongated in a filiform or antlerlike pattern with increased pigmentation of the basal layer and thinning of the suprapapillary epithelium. Dermal melanosis and a mild perivascular lymphohistiocytic infiltrate also are present with no increase in the number of melanocytes.^6,7 Galli-Galli disease is a variant of DDD that shares similar clinical and histologic features of DDD but is distinguished from DDD by suprabasilar nondyskeratotic acantholysis on histology.⁸

Regarding other differential diagnoses for our patient, acanthosis nigricans may be distinguished clinically by the presence of velvety and/or verrucous plaques, commonly in the neck folds and axillae. Histologically, acanthosis nigricans is distinct from DDD and involves hyperkeratosis, acanthosis, and epidermal papillomatosis. Our patient had no history of diabetes mellitus or insulin resistance. Granular parakeratosis presents with hyperpigmented hyperkeratotic papules and plaques classically confined to the axillary region; however, the involvement of other intertriginous areas may occur. Histologically, granular parakeratosis demonstrates compact parakeratosis with small bluish keratohyalin granules within the stratum corneum. Confluent and reticulated papillomatosis presents with red-brown keratotic papules that initially appear in the intermammary region and spread laterally forming a reticulated pattern. Histology is similar to acanthosis nigricans and demonstrates hyperkeratosis, acanthosis, and papillomatosis. Inverse psoriasis presents with symmetric and sharply demarcated, erythematous, nonscaly plaques in the intertriginous areas. The plaques of inverse psoriasis may be pruritic and/or sore and occasionally may become macerated. Inverse psoriasis shares similar histologic findings compared to classic plaque psoriasis but may have less confluent parakeratosis.

Treatment of DDD essentially is reserved for cosmetic reasons. Topical hydroquinone, tretinoin, and corticosteroids have been used with limited to no success.^5,9 Beneficial results after treatment with the Er:YAG laser have been reported.¹⁰

The Diagnosis: Frontal Fibrosing Alopecia Overlapping With Lichen Planus Pigmentosus 

Microscopic examination revealed focal dermal pigmentation, papillary fibrosis, and epidermal atrophy. These clinical and histologic findings indicated a diagnosis of fully developed lichen planus pigmentosus (LPP) overlapping with frontal fibrosing alopecia (FFA). Other cases have demonstrated an association between LPP and FFA.^1,2  

Lichen planus pigmentosus is considered an uncommon variant of lichen planus, as it has similar histopathologic findings and occasional coexistence.^3,4 It is characterized by hyperpigmented macules primarily located in sun-exposed and flexural areas of the skin. First described in India,⁵ this disease has a predilection for darker skin (Fitzpatrick skin types III-V),^6,7 and it has been reported in other racial and ethnic groups including Latin Americans, Middle Eastern populations, Japanese, and Koreans.^4,8 Typically, lesions initially appear as ill-defined, blue-grey, round to oval macules that coalesce into hyperpigmented patches. Involvement most commonly begins at the forehead and temples, which are affected in nearly all patients. Infrequently, LPP can be generalized or affect the oral mucosa; involvement of the palms, soles, and nails does not occur. Patients may be asymptomatic, but some experience mild pruritus and burning. The disease course is chronic and insidious, with new lesions appearing over time and old lesions progressively darkening and expanding.^6,7,9  

Although the pathogenesis of LPP is unknown, several exposures have been implicated, such as amla oil, mustard oil, henna, hair dye, and environmental pollutants.⁷ Because lesions characteristically occur in sun-exposed areas, UV light also may be involved. In addition, studies have suggested that LPP is associated with endocrinopathies such as diabetes mellitus and dyslipidemias, as in our patient, as well as autoimmune conditions such as vitiligo and systemic lupus erythematosus.^10,11  

Histopathologic findings are characterized by vacuolar degeneration of the basal layer in the epidermis as well as perivascular lymphohistiocytic infiltration and the presence of melanophages in the dermis.^3,9 Lichen planus pigmentosus is difficult to treat, as no consistently effective modality has been established. Topical tacrolimus, topical corticosteroids, oral retinoids, lasers, and sun protection have been implemented with underwhelming results.¹² 

Frontal fibrosing alopecia is a variant of lichen planopilaris that predominantly affects postmenopausal women and presents with frontotemporal hair loss in a bandlike distribution.^5,13 Both terminal and vellus hairs are affected. Involvement of multiple hair-bearing sites of the skin have been reported, including the entire scalp, eyebrows, and eyelashes. Affected areas may display hypopigmentation and be accompanied by pruritus and trichodynia.^14,15 The pathogenesis currently is under investigation, with studies demonstrating autoimmune, genetic, and possibly even endocrine predispositions.^16-18 Biopsies of lesions are indistinguishable from lichen planopilaris, which shows follicular lymphocytic infiltration, perifollicular fibrosis, interface dermatitis of the follicular infundibulum and isthmus, and vertical fibrous tracks.⁵ Patients with FFA have demonstrated variable responses to treatments, with one study showing improvement with oral finasteride or dutasteride.¹⁴ Topical and intralesional corticosteroids have yielded suboptimal effects. Other modalities include hydroxychloroquine and mycophenolate mofetil.^15,19 

Co-occurrence of LPP and FFA primarily is seen in postmenopausal women with darker skin,^14,15 as in our patient, though premenopausal cases have been reported. Lichen planus pigmentosus may serve as a harbinger in most patients.^1,2 In a similar fashion, our patient presented with hyperpigmented macular lesions prior to the onset of frontotemporal hair loss.  

Our patient was started on finasteride 2.5 mg daily, minoxidil foam 5%, clobetasol solution 0.05%, triamcinolone ointment 0.1%, and hydrocortisone ointment 2.5%. She was instructed to commence treatment and follow up in 6 months. 

The differential diagnosis includes dermatologic conditions that mimic both LPP and FFA. Postinflammatory hyperpigmentation and fixed drug reaction were unlikely based on the patient's history. The lesions of ashy dermatosis are characteristically gray erythematous macules on the trunk and limbs. Riehl melanosis is a rare pigmented contact dermatitis that is associated with a history of repeated contact with sensitizing allergens. Although Hori nevus is characterized by small, blue-gray or brown macules on the face, lesions predominantly occur on the bony prominences of the cheeks. Melasma also presents with dark to gray macules that affect the face and less commonly the neck, as in our patient.² 

Early discoid lupus erythematosus presents with round erythematous plaques with overlying scale extending into the hair follicles. In pseudopalade of Brocq, an idiopathic cicatricial alopecia, lesions typically are flesh colored. Biopsy also shows epidermal atrophy with additional dermal sclerosis and fibrosis. Folliculitis decalvans is a scarring form of alopecia associated with erythema and pustules, findings that were not present in our patient. Keratosis follicularis spinulosa decalvans is a rare, X-linked inherited ichthyosis manifesting as scarring alopecia with follicular depressions and papules on the scalp in younger males. Photophobia and other manifestations may be present. Alopecia mucinosa is a nonscarring alopecia with grouped follicular erythematous patches or plaques. Mucin sometimes can be squeezed from affected areas, and histopathologic examination shows mucin accumulation.⁴ 

The Diagnosis: Frontal Fibrosing Alopecia Overlapping With Lichen Planus Pigmentosus 

Microscopic examination revealed focal dermal pigmentation, papillary fibrosis, and epidermal atrophy. These clinical and histologic findings indicated a diagnosis of fully developed lichen planus pigmentosus (LPP) overlapping with frontal fibrosing alopecia (FFA). Other cases have demonstrated an association between LPP and FFA.^1,2  

Lichen planus pigmentosus is considered an uncommon variant of lichen planus, as it has similar histopathologic findings and occasional coexistence.^3,4 It is characterized by hyperpigmented macules primarily located in sun-exposed and flexural areas of the skin. First described in India,⁵ this disease has a predilection for darker skin (Fitzpatrick skin types III-V),^6,7 and it has been reported in other racial and ethnic groups including Latin Americans, Middle Eastern populations, Japanese, and Koreans.^4,8 Typically, lesions initially appear as ill-defined, blue-grey, round to oval macules that coalesce into hyperpigmented patches. Involvement most commonly begins at the forehead and temples, which are affected in nearly all patients. Infrequently, LPP can be generalized or affect the oral mucosa; involvement of the palms, soles, and nails does not occur. Patients may be asymptomatic, but some experience mild pruritus and burning. The disease course is chronic and insidious, with new lesions appearing over time and old lesions progressively darkening and expanding.^6,7,9  

Although the pathogenesis of LPP is unknown, several exposures have been implicated, such as amla oil, mustard oil, henna, hair dye, and environmental pollutants.⁷ Because lesions characteristically occur in sun-exposed areas, UV light also may be involved. In addition, studies have suggested that LPP is associated with endocrinopathies such as diabetes mellitus and dyslipidemias, as in our patient, as well as autoimmune conditions such as vitiligo and systemic lupus erythematosus.^10,11  

Histopathologic findings are characterized by vacuolar degeneration of the basal layer in the epidermis as well as perivascular lymphohistiocytic infiltration and the presence of melanophages in the dermis.^3,9 Lichen planus pigmentosus is difficult to treat, as no consistently effective modality has been established. Topical tacrolimus, topical corticosteroids, oral retinoids, lasers, and sun protection have been implemented with underwhelming results.¹² 

Frontal fibrosing alopecia is a variant of lichen planopilaris that predominantly affects postmenopausal women and presents with frontotemporal hair loss in a bandlike distribution.^5,13 Both terminal and vellus hairs are affected. Involvement of multiple hair-bearing sites of the skin have been reported, including the entire scalp, eyebrows, and eyelashes. Affected areas may display hypopigmentation and be accompanied by pruritus and trichodynia.^14,15 The pathogenesis currently is under investigation, with studies demonstrating autoimmune, genetic, and possibly even endocrine predispositions.^16-18 Biopsies of lesions are indistinguishable from lichen planopilaris, which shows follicular lymphocytic infiltration, perifollicular fibrosis, interface dermatitis of the follicular infundibulum and isthmus, and vertical fibrous tracks.⁵ Patients with FFA have demonstrated variable responses to treatments, with one study showing improvement with oral finasteride or dutasteride.¹⁴ Topical and intralesional corticosteroids have yielded suboptimal effects. Other modalities include hydroxychloroquine and mycophenolate mofetil.^15,19 

Co-occurrence of LPP and FFA primarily is seen in postmenopausal women with darker skin,^14,15 as in our patient, though premenopausal cases have been reported. Lichen planus pigmentosus may serve as a harbinger in most patients.^1,2 In a similar fashion, our patient presented with hyperpigmented macular lesions prior to the onset of frontotemporal hair loss.  

Our patient was started on finasteride 2.5 mg daily, minoxidil foam 5%, clobetasol solution 0.05%, triamcinolone ointment 0.1%, and hydrocortisone ointment 2.5%. She was instructed to commence treatment and follow up in 6 months. 

The differential diagnosis includes dermatologic conditions that mimic both LPP and FFA. Postinflammatory hyperpigmentation and fixed drug reaction were unlikely based on the patient's history. The lesions of ashy dermatosis are characteristically gray erythematous macules on the trunk and limbs. Riehl melanosis is a rare pigmented contact dermatitis that is associated with a history of repeated contact with sensitizing allergens. Although Hori nevus is characterized by small, blue-gray or brown macules on the face, lesions predominantly occur on the bony prominences of the cheeks. Melasma also presents with dark to gray macules that affect the face and less commonly the neck, as in our patient.² 

Early discoid lupus erythematosus presents with round erythematous plaques with overlying scale extending into the hair follicles. In pseudopalade of Brocq, an idiopathic cicatricial alopecia, lesions typically are flesh colored. Biopsy also shows epidermal atrophy with additional dermal sclerosis and fibrosis. Folliculitis decalvans is a scarring form of alopecia associated with erythema and pustules, findings that were not present in our patient. Keratosis follicularis spinulosa decalvans is a rare, X-linked inherited ichthyosis manifesting as scarring alopecia with follicular depressions and papules on the scalp in younger males. Photophobia and other manifestations may be present. Alopecia mucinosa is a nonscarring alopecia with grouped follicular erythematous patches or plaques. Mucin sometimes can be squeezed from affected areas, and histopathologic examination shows mucin accumulation.⁴ 

The Diagnosis: Frontal Fibrosing Alopecia Overlapping With Lichen Planus Pigmentosus 

Microscopic examination revealed focal dermal pigmentation, papillary fibrosis, and epidermal atrophy. These clinical and histologic findings indicated a diagnosis of fully developed lichen planus pigmentosus (LPP) overlapping with frontal fibrosing alopecia (FFA). Other cases have demonstrated an association between LPP and FFA.^1,2  

Lichen planus pigmentosus is considered an uncommon variant of lichen planus, as it has similar histopathologic findings and occasional coexistence.^3,4 It is characterized by hyperpigmented macules primarily located in sun-exposed and flexural areas of the skin. First described in India,⁵ this disease has a predilection for darker skin (Fitzpatrick skin types III-V),^6,7 and it has been reported in other racial and ethnic groups including Latin Americans, Middle Eastern populations, Japanese, and Koreans.^4,8 Typically, lesions initially appear as ill-defined, blue-grey, round to oval macules that coalesce into hyperpigmented patches. Involvement most commonly begins at the forehead and temples, which are affected in nearly all patients. Infrequently, LPP can be generalized or affect the oral mucosa; involvement of the palms, soles, and nails does not occur. Patients may be asymptomatic, but some experience mild pruritus and burning. The disease course is chronic and insidious, with new lesions appearing over time and old lesions progressively darkening and expanding.^6,7,9  

Although the pathogenesis of LPP is unknown, several exposures have been implicated, such as amla oil, mustard oil, henna, hair dye, and environmental pollutants.⁷ Because lesions characteristically occur in sun-exposed areas, UV light also may be involved. In addition, studies have suggested that LPP is associated with endocrinopathies such as diabetes mellitus and dyslipidemias, as in our patient, as well as autoimmune conditions such as vitiligo and systemic lupus erythematosus.^10,11  

Histopathologic findings are characterized by vacuolar degeneration of the basal layer in the epidermis as well as perivascular lymphohistiocytic infiltration and the presence of melanophages in the dermis.^3,9 Lichen planus pigmentosus is difficult to treat, as no consistently effective modality has been established. Topical tacrolimus, topical corticosteroids, oral retinoids, lasers, and sun protection have been implemented with underwhelming results.¹² 

Frontal fibrosing alopecia is a variant of lichen planopilaris that predominantly affects postmenopausal women and presents with frontotemporal hair loss in a bandlike distribution.^5,13 Both terminal and vellus hairs are affected. Involvement of multiple hair-bearing sites of the skin have been reported, including the entire scalp, eyebrows, and eyelashes. Affected areas may display hypopigmentation and be accompanied by pruritus and trichodynia.^14,15 The pathogenesis currently is under investigation, with studies demonstrating autoimmune, genetic, and possibly even endocrine predispositions.^16-18 Biopsies of lesions are indistinguishable from lichen planopilaris, which shows follicular lymphocytic infiltration, perifollicular fibrosis, interface dermatitis of the follicular infundibulum and isthmus, and vertical fibrous tracks.⁵ Patients with FFA have demonstrated variable responses to treatments, with one study showing improvement with oral finasteride or dutasteride.¹⁴ Topical and intralesional corticosteroids have yielded suboptimal effects. Other modalities include hydroxychloroquine and mycophenolate mofetil.^15,19 

Co-occurrence of LPP and FFA primarily is seen in postmenopausal women with darker skin,^14,15 as in our patient, though premenopausal cases have been reported. Lichen planus pigmentosus may serve as a harbinger in most patients.^1,2 In a similar fashion, our patient presented with hyperpigmented macular lesions prior to the onset of frontotemporal hair loss.  

Our patient was started on finasteride 2.5 mg daily, minoxidil foam 5%, clobetasol solution 0.05%, triamcinolone ointment 0.1%, and hydrocortisone ointment 2.5%. She was instructed to commence treatment and follow up in 6 months. 

The differential diagnosis includes dermatologic conditions that mimic both LPP and FFA. Postinflammatory hyperpigmentation and fixed drug reaction were unlikely based on the patient's history. The lesions of ashy dermatosis are characteristically gray erythematous macules on the trunk and limbs. Riehl melanosis is a rare pigmented contact dermatitis that is associated with a history of repeated contact with sensitizing allergens. Although Hori nevus is characterized by small, blue-gray or brown macules on the face, lesions predominantly occur on the bony prominences of the cheeks. Melasma also presents with dark to gray macules that affect the face and less commonly the neck, as in our patient.² 

Early discoid lupus erythematosus presents with round erythematous plaques with overlying scale extending into the hair follicles. In pseudopalade of Brocq, an idiopathic cicatricial alopecia, lesions typically are flesh colored. Biopsy also shows epidermal atrophy with additional dermal sclerosis and fibrosis. Folliculitis decalvans is a scarring form of alopecia associated with erythema and pustules, findings that were not present in our patient. Keratosis follicularis spinulosa decalvans is a rare, X-linked inherited ichthyosis manifesting as scarring alopecia with follicular depressions and papules on the scalp in younger males. Photophobia and other manifestations may be present. Alopecia mucinosa is a nonscarring alopecia with grouped follicular erythematous patches or plaques. Mucin sometimes can be squeezed from affected areas, and histopathologic examination shows mucin accumulation.⁴ 

Practice Gap

Multiple keratoacanthomas (KAs) of the legs often are a challenge to treat, especially when these lesions appear within a field of prurigo nodules. Multiple KAs associated with prurigo nodularis is a rarer finding; more often, the condition is reported on the lower limbs of elderly women with actinically damaged skin.^1,2 At times, it can be difficult to distinguish between KA and prurigo nodularis in these patients, who often report notable pruritus and might have associated eczematous dermatitis.²

Keratoacanthomas often are treated with aggressive modalities, such as Mohs micrographic surgery, excision, and electrodesiccation and curettage. Some patients are hesitant to undergo surgical treatment, however, preferring a less invasive approach. Trauma from these aggressive modalities also can be associated with recurrence of existing lesions or development of new KAs, possibly related to stimulation of a local inflammatory response and upregulation of helper T cells.^2-4

Acitretin and other systemic retinoids often are considered first-line therapy for multiple KAs. Cyclosporine has been added as adjunctive treatment in cases associated with prurigo nodularis or eczematous dermatitis^1,2; however, these treatments have a high rate of discontinuation because of adverse effects, including transaminitis, xerostomia, alopecia (acitretin), and renal toxicity (cyclosporine).²

Another treatment option for patients with coexisting KA and prurigo nodularis is intralesional corticosteroids, often administered in combination with systemic retinoids.³ Topical 5-fluorouracil (5-FU) has been used successfully for KA, but topical treatment options are limited if 5-FU fails. Topical imiquimod and cryotherapy are thought to be of little benefit, and the appearance of new KA within imiquimod and cryotherapy treatment fields has been reported.^1,2 Topical corticosteroids have been used as an adjuvant therapy for multiple KAs associated with prurigo nodularis; however, a PubMed search of articles indexed for MEDLINE using the terms keratoacanthoma and steroid and keratoacanthoma and prurigo nodularis yielded no published reports of successful use of topical corticosteroids as monotherapy.²

The Technique

For patients who want to continue topical treatment of coexisting KA and prurigo nodularis after topical 5-FU fails, we have found success applying a high-potency topical corticosteroid to affected areas under occlusion nightly for 6 to 8 weeks. This treatment not only leads to resolution of KA but also simultaneously treats prurigo nodules that might be clinically difficult to distinguish from KA in some presentations. This regimen has been implemented in our practice with remarkable reduction of KA burden and relief of pruritus.

In a 68-year-old woman who was treated with this technique, multiple biopsies had shown KA (or well-differentiated squamous cell carcinoma that appeared clinically as KA) on the shin (Figure, A) arising amid many lesions consistent with prurigo nodules. Topical 5-FU had failed, but the patient did not want to be treated with a more invasive modality, such as excision or injection.

Practical Implications

Treatment of multiple KAs associated with prurigo nodularis can present a distinct challenge. For the subset of patients who want to pursue topical treatment, options reported in the literature are limited. We have found success treating multiple KAs and associated prurigo nodules with a high-potency topical corticosteroid under occlusion, with minimal or no adverse effects. We believe that a topical corticosteroid can be implemented easily in clinical practice before a more invasive surgical or intralesional modality is considered.

Practice Gap

Multiple keratoacanthomas (KAs) of the legs often are a challenge to treat, especially when these lesions appear within a field of prurigo nodules. Multiple KAs associated with prurigo nodularis is a rarer finding; more often, the condition is reported on the lower limbs of elderly women with actinically damaged skin.^1,2 At times, it can be difficult to distinguish between KA and prurigo nodularis in these patients, who often report notable pruritus and might have associated eczematous dermatitis.²

Keratoacanthomas often are treated with aggressive modalities, such as Mohs micrographic surgery, excision, and electrodesiccation and curettage. Some patients are hesitant to undergo surgical treatment, however, preferring a less invasive approach. Trauma from these aggressive modalities also can be associated with recurrence of existing lesions or development of new KAs, possibly related to stimulation of a local inflammatory response and upregulation of helper T cells.^2-4

Acitretin and other systemic retinoids often are considered first-line therapy for multiple KAs. Cyclosporine has been added as adjunctive treatment in cases associated with prurigo nodularis or eczematous dermatitis^1,2; however, these treatments have a high rate of discontinuation because of adverse effects, including transaminitis, xerostomia, alopecia (acitretin), and renal toxicity (cyclosporine).²

Another treatment option for patients with coexisting KA and prurigo nodularis is intralesional corticosteroids, often administered in combination with systemic retinoids.³ Topical 5-fluorouracil (5-FU) has been used successfully for KA, but topical treatment options are limited if 5-FU fails. Topical imiquimod and cryotherapy are thought to be of little benefit, and the appearance of new KA within imiquimod and cryotherapy treatment fields has been reported.^1,2 Topical corticosteroids have been used as an adjuvant therapy for multiple KAs associated with prurigo nodularis; however, a PubMed search of articles indexed for MEDLINE using the terms keratoacanthoma and steroid and keratoacanthoma and prurigo nodularis yielded no published reports of successful use of topical corticosteroids as monotherapy.²

The Technique

For patients who want to continue topical treatment of coexisting KA and prurigo nodularis after topical 5-FU fails, we have found success applying a high-potency topical corticosteroid to affected areas under occlusion nightly for 6 to 8 weeks. This treatment not only leads to resolution of KA but also simultaneously treats prurigo nodules that might be clinically difficult to distinguish from KA in some presentations. This regimen has been implemented in our practice with remarkable reduction of KA burden and relief of pruritus.

In a 68-year-old woman who was treated with this technique, multiple biopsies had shown KA (or well-differentiated squamous cell carcinoma that appeared clinically as KA) on the shin (Figure, A) arising amid many lesions consistent with prurigo nodules. Topical 5-FU had failed, but the patient did not want to be treated with a more invasive modality, such as excision or injection.

Practical Implications

Treatment of multiple KAs associated with prurigo nodularis can present a distinct challenge. For the subset of patients who want to pursue topical treatment, options reported in the literature are limited. We have found success treating multiple KAs and associated prurigo nodules with a high-potency topical corticosteroid under occlusion, with minimal or no adverse effects. We believe that a topical corticosteroid can be implemented easily in clinical practice before a more invasive surgical or intralesional modality is considered.

Practice Gap

Multiple keratoacanthomas (KAs) of the legs often are a challenge to treat, especially when these lesions appear within a field of prurigo nodules. Multiple KAs associated with prurigo nodularis is a rarer finding; more often, the condition is reported on the lower limbs of elderly women with actinically damaged skin.^1,2 At times, it can be difficult to distinguish between KA and prurigo nodularis in these patients, who often report notable pruritus and might have associated eczematous dermatitis.²

Keratoacanthomas often are treated with aggressive modalities, such as Mohs micrographic surgery, excision, and electrodesiccation and curettage. Some patients are hesitant to undergo surgical treatment, however, preferring a less invasive approach. Trauma from these aggressive modalities also can be associated with recurrence of existing lesions or development of new KAs, possibly related to stimulation of a local inflammatory response and upregulation of helper T cells.^2-4

Acitretin and other systemic retinoids often are considered first-line therapy for multiple KAs. Cyclosporine has been added as adjunctive treatment in cases associated with prurigo nodularis or eczematous dermatitis^1,2; however, these treatments have a high rate of discontinuation because of adverse effects, including transaminitis, xerostomia, alopecia (acitretin), and renal toxicity (cyclosporine).²

Another treatment option for patients with coexisting KA and prurigo nodularis is intralesional corticosteroids, often administered in combination with systemic retinoids.³ Topical 5-fluorouracil (5-FU) has been used successfully for KA, but topical treatment options are limited if 5-FU fails. Topical imiquimod and cryotherapy are thought to be of little benefit, and the appearance of new KA within imiquimod and cryotherapy treatment fields has been reported.^1,2 Topical corticosteroids have been used as an adjuvant therapy for multiple KAs associated with prurigo nodularis; however, a PubMed search of articles indexed for MEDLINE using the terms keratoacanthoma and steroid and keratoacanthoma and prurigo nodularis yielded no published reports of successful use of topical corticosteroids as monotherapy.²

The Technique

For patients who want to continue topical treatment of coexisting KA and prurigo nodularis after topical 5-FU fails, we have found success applying a high-potency topical corticosteroid to affected areas under occlusion nightly for 6 to 8 weeks. This treatment not only leads to resolution of KA but also simultaneously treats prurigo nodules that might be clinically difficult to distinguish from KA in some presentations. This regimen has been implemented in our practice with remarkable reduction of KA burden and relief of pruritus.

In a 68-year-old woman who was treated with this technique, multiple biopsies had shown KA (or well-differentiated squamous cell carcinoma that appeared clinically as KA) on the shin (Figure, A) arising amid many lesions consistent with prurigo nodules. Topical 5-FU had failed, but the patient did not want to be treated with a more invasive modality, such as excision or injection.

Practical Implications

Treatment of multiple KAs associated with prurigo nodularis can present a distinct challenge. For the subset of patients who want to pursue topical treatment, options reported in the literature are limited. We have found success treating multiple KAs and associated prurigo nodules with a high-potency topical corticosteroid under occlusion, with minimal or no adverse effects. We believe that a topical corticosteroid can be implemented easily in clinical practice before a more invasive surgical or intralesional modality is considered.

The Diagnosis: Lichen Planus Pigmentosus-Inversus 

Histopathologic examination revealed hyperkeratosis with dense, bandlike, lymphocytic inflammation at the dermoepidermal junction with associated melanin-containing macrophages in the papillary dermis (Figure 1). The physical examination and histopathology were consistent with a diagnosis of lichen planus pigmentosus-inversus (LPPI). Treatment was discussed with the patient, with options including phototherapy, tacrolimus, or a high-dose steroid. Given that the lesions were asymptomatic and not bothersome, the patient denied treatment and agreed to routine follow-up. 

Given the gender, age, and clinical features of our patient, this case represents a classic scenario of LPPI. It currently is unknown if ethnicity plays a role in the disorder. Lichen planus pigmentosus-inversus initially was thought to be more prevalent in White patients; however, studies have been reported in individuals with darker skin.^1,2 

The main differential diagnosis includes erythema dyschromicum perstans, postinflammatory hyperpigmentation, and lichen planus. Although erythema dyschromicum perstans develops in individuals with darker skin, lesions are restricted to the upper torso and limbs.^2-4 In both lichen planus and lichen actinicus, skin findings primarily develop in sun-exposed areas, such as the face, neck, and hands.^4,6 Given the negative history of trauma, postinflammatory hyperpigmentation was unlikely in our patient. Furthermore, a distinguishing characteristic of LPPI is the deposition of melanin deep within the dermal layer.³ 

Lesions developing in nonexposed intertriginous skin makes LPPI unique and distinguishes it from other more common conditions. The lesions commonly are hyperpigmented and are not as pruritic as other lichen-associated conditions. Lichen planus pigmentosus-inversus often persists for months, and the rash generally is resistant to treatment.^2,5 Topical tacrolimus and high-dose steroids may improve symptoms, though results have varied substantially. In addition, some cases have resolved spontaneously.^1,4,6,7 Because LPPI is asymptomatic and benign, spontaneous resolution and routine care is a reasonable treatment strategy. Some cases have supported this strategy as safe and high-value care.² 

The Diagnosis: Lichen Planus Pigmentosus-Inversus 

Histopathologic examination revealed hyperkeratosis with dense, bandlike, lymphocytic inflammation at the dermoepidermal junction with associated melanin-containing macrophages in the papillary dermis (Figure 1). The physical examination and histopathology were consistent with a diagnosis of lichen planus pigmentosus-inversus (LPPI). Treatment was discussed with the patient, with options including phototherapy, tacrolimus, or a high-dose steroid. Given that the lesions were asymptomatic and not bothersome, the patient denied treatment and agreed to routine follow-up. 

Given the gender, age, and clinical features of our patient, this case represents a classic scenario of LPPI. It currently is unknown if ethnicity plays a role in the disorder. Lichen planus pigmentosus-inversus initially was thought to be more prevalent in White patients; however, studies have been reported in individuals with darker skin.^1,2 

The main differential diagnosis includes erythema dyschromicum perstans, postinflammatory hyperpigmentation, and lichen planus. Although erythema dyschromicum perstans develops in individuals with darker skin, lesions are restricted to the upper torso and limbs.^2-4 In both lichen planus and lichen actinicus, skin findings primarily develop in sun-exposed areas, such as the face, neck, and hands.^4,6 Given the negative history of trauma, postinflammatory hyperpigmentation was unlikely in our patient. Furthermore, a distinguishing characteristic of LPPI is the deposition of melanin deep within the dermal layer.³ 

Lesions developing in nonexposed intertriginous skin makes LPPI unique and distinguishes it from other more common conditions. The lesions commonly are hyperpigmented and are not as pruritic as other lichen-associated conditions. Lichen planus pigmentosus-inversus often persists for months, and the rash generally is resistant to treatment.^2,5 Topical tacrolimus and high-dose steroids may improve symptoms, though results have varied substantially. In addition, some cases have resolved spontaneously.^1,4,6,7 Because LPPI is asymptomatic and benign, spontaneous resolution and routine care is a reasonable treatment strategy. Some cases have supported this strategy as safe and high-value care.² 

The Diagnosis: Lichen Planus Pigmentosus-Inversus 

Histopathologic examination revealed hyperkeratosis with dense, bandlike, lymphocytic inflammation at the dermoepidermal junction with associated melanin-containing macrophages in the papillary dermis (Figure 1). The physical examination and histopathology were consistent with a diagnosis of lichen planus pigmentosus-inversus (LPPI). Treatment was discussed with the patient, with options including phototherapy, tacrolimus, or a high-dose steroid. Given that the lesions were asymptomatic and not bothersome, the patient denied treatment and agreed to routine follow-up. 

Given the gender, age, and clinical features of our patient, this case represents a classic scenario of LPPI. It currently is unknown if ethnicity plays a role in the disorder. Lichen planus pigmentosus-inversus initially was thought to be more prevalent in White patients; however, studies have been reported in individuals with darker skin.^1,2 

The main differential diagnosis includes erythema dyschromicum perstans, postinflammatory hyperpigmentation, and lichen planus. Although erythema dyschromicum perstans develops in individuals with darker skin, lesions are restricted to the upper torso and limbs.^2-4 In both lichen planus and lichen actinicus, skin findings primarily develop in sun-exposed areas, such as the face, neck, and hands.^4,6 Given the negative history of trauma, postinflammatory hyperpigmentation was unlikely in our patient. Furthermore, a distinguishing characteristic of LPPI is the deposition of melanin deep within the dermal layer.³ 

Lesions developing in nonexposed intertriginous skin makes LPPI unique and distinguishes it from other more common conditions. The lesions commonly are hyperpigmented and are not as pruritic as other lichen-associated conditions. Lichen planus pigmentosus-inversus often persists for months, and the rash generally is resistant to treatment.^2,5 Topical tacrolimus and high-dose steroids may improve symptoms, though results have varied substantially. In addition, some cases have resolved spontaneously.^1,4,6,7 Because LPPI is asymptomatic and benign, spontaneous resolution and routine care is a reasonable treatment strategy. Some cases have supported this strategy as safe and high-value care.² 

Limited data exist comparing staples and sutures for scalp closures during Mohs micrographic surgery (MMS). As a result, the closure method for these scalp wounds is based on surgeon preference without established consensus. The purpose of this study was to survey practicing Mohs surgeons on their scalp wound closure preferences as well as the clinical and economic variables that impact their decisions. Understanding practice habits can guide future trial design, with a goal of creating established criterion for MMS scalp wound closures.

Methods

An anonymous survey was distributed from April 2019 to June 2019 to fellowship-trained Mohs surgeons using an electronic mailing list from the American College of Mohs Surgery (ACMS). The 10-question survey was approved by the University of Kansas institutional review board and the executive committee of the ACMS. Surgeons were asked about their preferred method for scalp wound closure as well as clinical and economic variables that impacted those preferences. Respondents indicated their frequency of using deep sutures, epidermal sutures, and wound undermining on a sliding scale of 0% to 100%. Comparisons were made between practice habits, preferences, and surgeon demographics using t tests. Statistical significance was determined as P<.05.

Results

Sixty-eight ACMS fellowship-trained Mohs surgeons completed the survey. The average age of respondents was 45 years; 69.1% (n=47) of respondents were male, and 76.5% (n=52) practiced in a private setting (Table 1). Regardless of epidermal closure type, deep suture placement was used in an average (standard deviation [SD]) of 88.8% (19.5%) of cases overall, which did not statistically differ between years of Mohs experience or practice setting (Table 2). Wound undermining was performed in an average (SD) of 83.0% (24.3%) of cases overall and was more prevalent in private vs academic settings (87.6% [17.8%] vs 65.7% [35.0%]; P<.01). Epidermal sutures were used in an average (SD) of 27.1% (33.5%) of scalp wound cases overall. Surgeons with less experience (≤5 years) used them more frequently (average [SD], 42.7% [36.2%] of cases) than surgeons with more experience (≥16 years; average [SD], 18.8% [32.6%] of cases; P=.037). There was no significant difference between epidermal suture placement rates and practice setting (average [SD], 18.1% [28.1%] of cases for academic providers vs 30.0% [34.8%] of cases with private providers; P=.210).

Clinical and economic factors that were most important during wound closure were ranked (beginning with most important) as the following: risk of complications, cosmetic outcome, hair preservation, patient comfort during closure, healing time, and closure cost. In all demographic cases, risk of complications was ranked 1 or 2 (1=most important; 6=least important) overall; cost was the least important factor overall (Table 2).

Surgeons perceived staples to be superior for speed of closure and for closing wounds in high-tension areas, whereas sutures were perceived as superior when considering cost of closure and ease of removal (Table 3). Successful healing rate, healing time, hair preservation, overall cosmetic outcome, and lower risk of complications were viewed as equivalent when comparing staples and sutures.

Comment

Epidermal closure with sutures was reportedly used in an average of only 27.1% of scalp wound cases, with clinical factors such as cosmetic outcome, risk of complications, and closure time seen as either equivalent or inferior to staples. Our data suggest that surgeon closure perceptions generally are in agreement with established head and neck literature within different medical specialties that favor staple closures, particularly in high-tension areas.¹ Interestingly, the most common reasons given for not using staples included patient discomfort, cost, and worse cosmetic outcomes, which are unsubstantiated with head and neck comparative studies.^2-4

Although cost was the least important variable for determining closure type in our surveyed cohort, it is likely that the overall cost of closure is frequently underestimated. A higher material cost is noted with staples; however, the largest determinant of overall cost remains the surgeon’s time, which is reduced by factors of 10 or more when closing with staples.^2,3 This difference—coupled with the unchanged cosmetic outcome and complication rates—makes staples more advantageous for high-tension scalp wounds.⁴ Moreover, the stapling technique is more reproducible than suturing, which requires more surgical skill and experience.

Limitations of this study include a lack of directly comparable data for staple and suture scalp wound closures. In addition, the small cohort of respondents in this preliminary study can serve to guide future studies.

Conclusion

Scalp wounds during MMS were most frequently closed using staples vs sutures, with the perception that these methods are equivalent in complication risk, cosmetic outcome, and overall patient satisfaction. These results agree with comparative literature for head and neck surgery and assist with establishing an epidemiologic baseline for future studies comparing their use during MMS.

Limited data exist comparing staples and sutures for scalp closures during Mohs micrographic surgery (MMS). As a result, the closure method for these scalp wounds is based on surgeon preference without established consensus. The purpose of this study was to survey practicing Mohs surgeons on their scalp wound closure preferences as well as the clinical and economic variables that impact their decisions. Understanding practice habits can guide future trial design, with a goal of creating established criterion for MMS scalp wound closures.

Methods

An anonymous survey was distributed from April 2019 to June 2019 to fellowship-trained Mohs surgeons using an electronic mailing list from the American College of Mohs Surgery (ACMS). The 10-question survey was approved by the University of Kansas institutional review board and the executive committee of the ACMS. Surgeons were asked about their preferred method for scalp wound closure as well as clinical and economic variables that impacted those preferences. Respondents indicated their frequency of using deep sutures, epidermal sutures, and wound undermining on a sliding scale of 0% to 100%. Comparisons were made between practice habits, preferences, and surgeon demographics using t tests. Statistical significance was determined as P<.05.

Results

Sixty-eight ACMS fellowship-trained Mohs surgeons completed the survey. The average age of respondents was 45 years; 69.1% (n=47) of respondents were male, and 76.5% (n=52) practiced in a private setting (Table 1). Regardless of epidermal closure type, deep suture placement was used in an average (standard deviation [SD]) of 88.8% (19.5%) of cases overall, which did not statistically differ between years of Mohs experience or practice setting (Table 2). Wound undermining was performed in an average (SD) of 83.0% (24.3%) of cases overall and was more prevalent in private vs academic settings (87.6% [17.8%] vs 65.7% [35.0%]; P<.01). Epidermal sutures were used in an average (SD) of 27.1% (33.5%) of scalp wound cases overall. Surgeons with less experience (≤5 years) used them more frequently (average [SD], 42.7% [36.2%] of cases) than surgeons with more experience (≥16 years; average [SD], 18.8% [32.6%] of cases; P=.037). There was no significant difference between epidermal suture placement rates and practice setting (average [SD], 18.1% [28.1%] of cases for academic providers vs 30.0% [34.8%] of cases with private providers; P=.210).

Clinical and economic factors that were most important during wound closure were ranked (beginning with most important) as the following: risk of complications, cosmetic outcome, hair preservation, patient comfort during closure, healing time, and closure cost. In all demographic cases, risk of complications was ranked 1 or 2 (1=most important; 6=least important) overall; cost was the least important factor overall (Table 2).

Surgeons perceived staples to be superior for speed of closure and for closing wounds in high-tension areas, whereas sutures were perceived as superior when considering cost of closure and ease of removal (Table 3). Successful healing rate, healing time, hair preservation, overall cosmetic outcome, and lower risk of complications were viewed as equivalent when comparing staples and sutures.

Comment

Epidermal closure with sutures was reportedly used in an average of only 27.1% of scalp wound cases, with clinical factors such as cosmetic outcome, risk of complications, and closure time seen as either equivalent or inferior to staples. Our data suggest that surgeon closure perceptions generally are in agreement with established head and neck literature within different medical specialties that favor staple closures, particularly in high-tension areas.¹ Interestingly, the most common reasons given for not using staples included patient discomfort, cost, and worse cosmetic outcomes, which are unsubstantiated with head and neck comparative studies.^2-4

Although cost was the least important variable for determining closure type in our surveyed cohort, it is likely that the overall cost of closure is frequently underestimated. A higher material cost is noted with staples; however, the largest determinant of overall cost remains the surgeon’s time, which is reduced by factors of 10 or more when closing with staples.^2,3 This difference—coupled with the unchanged cosmetic outcome and complication rates—makes staples more advantageous for high-tension scalp wounds.⁴ Moreover, the stapling technique is more reproducible than suturing, which requires more surgical skill and experience.

Limitations of this study include a lack of directly comparable data for staple and suture scalp wound closures. In addition, the small cohort of respondents in this preliminary study can serve to guide future studies.

Conclusion

Scalp wounds during MMS were most frequently closed using staples vs sutures, with the perception that these methods are equivalent in complication risk, cosmetic outcome, and overall patient satisfaction. These results agree with comparative literature for head and neck surgery and assist with establishing an epidemiologic baseline for future studies comparing their use during MMS.

Limited data exist comparing staples and sutures for scalp closures during Mohs micrographic surgery (MMS). As a result, the closure method for these scalp wounds is based on surgeon preference without established consensus. The purpose of this study was to survey practicing Mohs surgeons on their scalp wound closure preferences as well as the clinical and economic variables that impact their decisions. Understanding practice habits can guide future trial design, with a goal of creating established criterion for MMS scalp wound closures.

Methods

An anonymous survey was distributed from April 2019 to June 2019 to fellowship-trained Mohs surgeons using an electronic mailing list from the American College of Mohs Surgery (ACMS). The 10-question survey was approved by the University of Kansas institutional review board and the executive committee of the ACMS. Surgeons were asked about their preferred method for scalp wound closure as well as clinical and economic variables that impacted those preferences. Respondents indicated their frequency of using deep sutures, epidermal sutures, and wound undermining on a sliding scale of 0% to 100%. Comparisons were made between practice habits, preferences, and surgeon demographics using t tests. Statistical significance was determined as P<.05.

Results

Sixty-eight ACMS fellowship-trained Mohs surgeons completed the survey. The average age of respondents was 45 years; 69.1% (n=47) of respondents were male, and 76.5% (n=52) practiced in a private setting (Table 1). Regardless of epidermal closure type, deep suture placement was used in an average (standard deviation [SD]) of 88.8% (19.5%) of cases overall, which did not statistically differ between years of Mohs experience or practice setting (Table 2). Wound undermining was performed in an average (SD) of 83.0% (24.3%) of cases overall and was more prevalent in private vs academic settings (87.6% [17.8%] vs 65.7% [35.0%]; P<.01). Epidermal sutures were used in an average (SD) of 27.1% (33.5%) of scalp wound cases overall. Surgeons with less experience (≤5 years) used them more frequently (average [SD], 42.7% [36.2%] of cases) than surgeons with more experience (≥16 years; average [SD], 18.8% [32.6%] of cases; P=.037). There was no significant difference between epidermal suture placement rates and practice setting (average [SD], 18.1% [28.1%] of cases for academic providers vs 30.0% [34.8%] of cases with private providers; P=.210).

Clinical and economic factors that were most important during wound closure were ranked (beginning with most important) as the following: risk of complications, cosmetic outcome, hair preservation, patient comfort during closure, healing time, and closure cost. In all demographic cases, risk of complications was ranked 1 or 2 (1=most important; 6=least important) overall; cost was the least important factor overall (Table 2).

Surgeons perceived staples to be superior for speed of closure and for closing wounds in high-tension areas, whereas sutures were perceived as superior when considering cost of closure and ease of removal (Table 3). Successful healing rate, healing time, hair preservation, overall cosmetic outcome, and lower risk of complications were viewed as equivalent when comparing staples and sutures.

Comment

Epidermal closure with sutures was reportedly used in an average of only 27.1% of scalp wound cases, with clinical factors such as cosmetic outcome, risk of complications, and closure time seen as either equivalent or inferior to staples. Our data suggest that surgeon closure perceptions generally are in agreement with established head and neck literature within different medical specialties that favor staple closures, particularly in high-tension areas.¹ Interestingly, the most common reasons given for not using staples included patient discomfort, cost, and worse cosmetic outcomes, which are unsubstantiated with head and neck comparative studies.^2-4

Although cost was the least important variable for determining closure type in our surveyed cohort, it is likely that the overall cost of closure is frequently underestimated. A higher material cost is noted with staples; however, the largest determinant of overall cost remains the surgeon’s time, which is reduced by factors of 10 or more when closing with staples.^2,3 This difference—coupled with the unchanged cosmetic outcome and complication rates—makes staples more advantageous for high-tension scalp wounds.⁴ Moreover, the stapling technique is more reproducible than suturing, which requires more surgical skill and experience.

Limitations of this study include a lack of directly comparable data for staple and suture scalp wound closures. In addition, the small cohort of respondents in this preliminary study can serve to guide future studies.

Conclusion

Scalp wounds during MMS were most frequently closed using staples vs sutures, with the perception that these methods are equivalent in complication risk, cosmetic outcome, and overall patient satisfaction. These results agree with comparative literature for head and neck surgery and assist with establishing an epidemiologic baseline for future studies comparing their use during MMS.

The Diagnosis: Epidermodysplasia Verruciformis 

Histopathologic examination demonstrated acanthosis and coarse hypergranulosis with enlarged keratinocytes exhibiting blue cytoplasmic discoloration (Figure), which was suggestive of acquired epidermodysplasia verruciformis (EV).  

Acquired EV is a rare dermatologic condition associated with specific human papillomavirus (HPV) types that presents with recalcitrant lesions most commonly in the setting of immunosuppression.¹ The most common HPV types associated with EV are HPV-5 and -8, but associations with HPV-3, -9, -10, -12, -14, -15, -17, -19 to -25, -36 to -38, -47, and -50 also have been reported.^1,2 Acquired EV has been identified in individuals with human immunodeficiency virus, as well as in immunosuppressed patients with organ transplantation, Hodgkin lymphoma, systemic lupus erythematosus, and IgM deficiency, and in patients taking immunosuppressive medications such as tumor necrosis factor α inhibitors.^1,3 The diagnosis is clinicopathological with potential polymerase chain reaction studies to identify underlying HPV types. 

Acquired EV presents as hypopigmented to red, tinea versicolor-like macules or as verrucous, flat-topped papules on the trunk, arms, and/or legs.⁴ Histopathology reveals viral epidermal cytopathic changes, blue cytoplasm, and coarse hypogranulosis.⁴ 

There is no standardized treatment regimen for acquired EV, and no single approach has proven to yield an efficacious clinical outcome. Topical treatment options include steroids, retinoids, immunomodulators, cryotherapy, and electrosurgery, whereas retinoids or interferon alfa have been used as oral systemic therapy. Photodynamic therapy also has been shown to improve symptoms.³ Combination therapy such as interferon alfa with zidovudine or imiquimod with oral isotretinoin has shown better results than any single treatment.⁴ Due to the underlying HPV infection and its role in promotion of skin cancer development, lesions can characteristically undergo malignant transformations into Bowen disease but most commonly invasive squamous cell carcinoma (SCC), with initial lesions preferentially affecting sun-exposed areas due to the synergistic effect of UV light with EV-HPV lesions. The EV-HPV strains ^{5, 8,} and 41 carry the highest oncogenic potential.5 Little is known of the true incidence of oncogenicity for acquired EV. Regardless, consistent sun protection and lifelong clinical examinations are critical for prognosis.⁵  

The differential diagnosis of EV presenting in a tattoo includes allergic contact dermatitis, cutaneous sarcoidosis, pityriasis versicolor, and SCC. The pathology is critical to differentiate between these entities. The most frequently reported skin reactions to tattoo ink include inflammatory diseases (eg, allergic contact dermatitis, granulomatous reaction) or infectious diseases (eg, bacterial, viral, fungal).⁶ Allergic contact dermatitis, typically red pigment, is a common tattoo reaction. The most common histologic feature, however, is spongiosis, which results from intercellular edema. It often is limited to the lower epidermis but may affect the upper layers if the reaction is severe.⁷ Cutaneous sarcoidosis is a great masquerader that can present in various ways; however, its salient features on pathology are noncaseating granuloma involving the basal cell layer and epithelioid granuloma consisting of Langerhans giant cells.⁸ Although pityriasis versicolor can present in young immunocompromised adults, histologically salient features are the presence of both spores and hyphae in the stratum corneum.⁹ Although immunosuppression is a known risk factor for SCC, it is characterized histologically by hyperkeratosis, parakeratosis, and acanthosis with thickened and elongated rete ridges. Scattered atypical cells and frequent mitoses are present.¹⁰ 

The Diagnosis: Epidermodysplasia Verruciformis 

Histopathologic examination demonstrated acanthosis and coarse hypergranulosis with enlarged keratinocytes exhibiting blue cytoplasmic discoloration (Figure), which was suggestive of acquired epidermodysplasia verruciformis (EV).  

Acquired EV is a rare dermatologic condition associated with specific human papillomavirus (HPV) types that presents with recalcitrant lesions most commonly in the setting of immunosuppression.¹ The most common HPV types associated with EV are HPV-5 and -8, but associations with HPV-3, -9, -10, -12, -14, -15, -17, -19 to -25, -36 to -38, -47, and -50 also have been reported.^1,2 Acquired EV has been identified in individuals with human immunodeficiency virus, as well as in immunosuppressed patients with organ transplantation, Hodgkin lymphoma, systemic lupus erythematosus, and IgM deficiency, and in patients taking immunosuppressive medications such as tumor necrosis factor α inhibitors.^1,3 The diagnosis is clinicopathological with potential polymerase chain reaction studies to identify underlying HPV types. 

Acquired EV presents as hypopigmented to red, tinea versicolor-like macules or as verrucous, flat-topped papules on the trunk, arms, and/or legs.⁴ Histopathology reveals viral epidermal cytopathic changes, blue cytoplasm, and coarse hypogranulosis.⁴ 

There is no standardized treatment regimen for acquired EV, and no single approach has proven to yield an efficacious clinical outcome. Topical treatment options include steroids, retinoids, immunomodulators, cryotherapy, and electrosurgery, whereas retinoids or interferon alfa have been used as oral systemic therapy. Photodynamic therapy also has been shown to improve symptoms.³ Combination therapy such as interferon alfa with zidovudine or imiquimod with oral isotretinoin has shown better results than any single treatment.⁴ Due to the underlying HPV infection and its role in promotion of skin cancer development, lesions can characteristically undergo malignant transformations into Bowen disease but most commonly invasive squamous cell carcinoma (SCC), with initial lesions preferentially affecting sun-exposed areas due to the synergistic effect of UV light with EV-HPV lesions. The EV-HPV strains ^{5, 8,} and 41 carry the highest oncogenic potential.5 Little is known of the true incidence of oncogenicity for acquired EV. Regardless, consistent sun protection and lifelong clinical examinations are critical for prognosis.⁵  

The differential diagnosis of EV presenting in a tattoo includes allergic contact dermatitis, cutaneous sarcoidosis, pityriasis versicolor, and SCC. The pathology is critical to differentiate between these entities. The most frequently reported skin reactions to tattoo ink include inflammatory diseases (eg, allergic contact dermatitis, granulomatous reaction) or infectious diseases (eg, bacterial, viral, fungal).⁶ Allergic contact dermatitis, typically red pigment, is a common tattoo reaction. The most common histologic feature, however, is spongiosis, which results from intercellular edema. It often is limited to the lower epidermis but may affect the upper layers if the reaction is severe.⁷ Cutaneous sarcoidosis is a great masquerader that can present in various ways; however, its salient features on pathology are noncaseating granuloma involving the basal cell layer and epithelioid granuloma consisting of Langerhans giant cells.⁸ Although pityriasis versicolor can present in young immunocompromised adults, histologically salient features are the presence of both spores and hyphae in the stratum corneum.⁹ Although immunosuppression is a known risk factor for SCC, it is characterized histologically by hyperkeratosis, parakeratosis, and acanthosis with thickened and elongated rete ridges. Scattered atypical cells and frequent mitoses are present.¹⁰ 

The Diagnosis: Epidermodysplasia Verruciformis 

Histopathologic examination demonstrated acanthosis and coarse hypergranulosis with enlarged keratinocytes exhibiting blue cytoplasmic discoloration (Figure), which was suggestive of acquired epidermodysplasia verruciformis (EV).  

Acquired EV is a rare dermatologic condition associated with specific human papillomavirus (HPV) types that presents with recalcitrant lesions most commonly in the setting of immunosuppression.¹ The most common HPV types associated with EV are HPV-5 and -8, but associations with HPV-3, -9, -10, -12, -14, -15, -17, -19 to -25, -36 to -38, -47, and -50 also have been reported.^1,2 Acquired EV has been identified in individuals with human immunodeficiency virus, as well as in immunosuppressed patients with organ transplantation, Hodgkin lymphoma, systemic lupus erythematosus, and IgM deficiency, and in patients taking immunosuppressive medications such as tumor necrosis factor α inhibitors.^1,3 The diagnosis is clinicopathological with potential polymerase chain reaction studies to identify underlying HPV types. 

Acquired EV presents as hypopigmented to red, tinea versicolor-like macules or as verrucous, flat-topped papules on the trunk, arms, and/or legs.⁴ Histopathology reveals viral epidermal cytopathic changes, blue cytoplasm, and coarse hypogranulosis.⁴ 

There is no standardized treatment regimen for acquired EV, and no single approach has proven to yield an efficacious clinical outcome. Topical treatment options include steroids, retinoids, immunomodulators, cryotherapy, and electrosurgery, whereas retinoids or interferon alfa have been used as oral systemic therapy. Photodynamic therapy also has been shown to improve symptoms.³ Combination therapy such as interferon alfa with zidovudine or imiquimod with oral isotretinoin has shown better results than any single treatment.⁴ Due to the underlying HPV infection and its role in promotion of skin cancer development, lesions can characteristically undergo malignant transformations into Bowen disease but most commonly invasive squamous cell carcinoma (SCC), with initial lesions preferentially affecting sun-exposed areas due to the synergistic effect of UV light with EV-HPV lesions. The EV-HPV strains ^{5, 8,} and 41 carry the highest oncogenic potential.5 Little is known of the true incidence of oncogenicity for acquired EV. Regardless, consistent sun protection and lifelong clinical examinations are critical for prognosis.⁵  

The differential diagnosis of EV presenting in a tattoo includes allergic contact dermatitis, cutaneous sarcoidosis, pityriasis versicolor, and SCC. The pathology is critical to differentiate between these entities. The most frequently reported skin reactions to tattoo ink include inflammatory diseases (eg, allergic contact dermatitis, granulomatous reaction) or infectious diseases (eg, bacterial, viral, fungal).⁶ Allergic contact dermatitis, typically red pigment, is a common tattoo reaction. The most common histologic feature, however, is spongiosis, which results from intercellular edema. It often is limited to the lower epidermis but may affect the upper layers if the reaction is severe.⁷ Cutaneous sarcoidosis is a great masquerader that can present in various ways; however, its salient features on pathology are noncaseating granuloma involving the basal cell layer and epithelioid granuloma consisting of Langerhans giant cells.⁸ Although pityriasis versicolor can present in young immunocompromised adults, histologically salient features are the presence of both spores and hyphae in the stratum corneum.⁹ Although immunosuppression is a known risk factor for SCC, it is characterized histologically by hyperkeratosis, parakeratosis, and acanthosis with thickened and elongated rete ridges. Scattered atypical cells and frequent mitoses are present.¹⁰ 

To the Editor:

A thorough full-body skin examination (FBSE) is an integral component of a dermatologic encounter and helps identify potentially malignant and high-risk lesions, particularly in areas that are difficult for the patient to visualize.¹ Despite these benefits, many patients experience discomfort and anxiety about this examination because it involves sensitive anatomical areas. The true psychological impact of an FBSE is not clearly understood; however, research into improving patient comfort in these circumstances can have a broad positive impact.² The purpose of this pilot study was to establish patients’ willingness to complete a pre-encounter questionnaire that defines their FBSE preferences as well as to identify the anatomical areas that are of most concern.

This study was approved by the University of Kansas institutional review board as nonhuman subjects research. A pre-encounter questionnaire that included information about the benefits of FBSEs was administered to 34 patients, allowing them to identify anatomic locations that they wanted to exclude from the FBSE.

Following the patient visit (in which the identified anatomical locations were excluded), patients were given a brief exit survey that asked about (1) their preference for a pre-encounter FBSE questionnaire and (2) the impact of the questionnaire on their anxiety level throughout the encounter. Preference for asking was surveyed using a 10-point scale (10=strong preference for the pre-encounter survey; 1=strong preference against the pre-encounter survey). Change in anxiety was surveyed using a 10-point scale (10=strong reduction in anxiety after the pre-encounter survey; 1=strong increase in anxiety after the pre-encounter survey). Statistical analysis was performed using 2-tailed unpaired t tests, with P<.05 considered statistically significant.

Twenty female and 14 male patients were enrolled (mean age, 53 years)(Table). The most commonly excluded anatomical location on the pre-encounter survey was the genitals, followed by the buttocks, breasts/chest, legs, feet, and abdomen (Table); 10 (71%) male and 13 (65%) female respondents did not exclude any component of the FBSE.

The small sample size was a limitation of this study. Future studies can assess with greater precision the clear benefits of a pre-encounter survey as well as the benefits or drawbacks of a survey compared to other modalities that are aimed at reducing patient anxiety about the FBSE, such as having the physician directly ask the patient about areas to avoid during the examination.

A pre-encounter survey about the FBSE can serve as an efficient means of determining patient preference and reducing self-reported anxiety about the visit.

To the Editor:

A thorough full-body skin examination (FBSE) is an integral component of a dermatologic encounter and helps identify potentially malignant and high-risk lesions, particularly in areas that are difficult for the patient to visualize.¹ Despite these benefits, many patients experience discomfort and anxiety about this examination because it involves sensitive anatomical areas. The true psychological impact of an FBSE is not clearly understood; however, research into improving patient comfort in these circumstances can have a broad positive impact.² The purpose of this pilot study was to establish patients’ willingness to complete a pre-encounter questionnaire that defines their FBSE preferences as well as to identify the anatomical areas that are of most concern.

This study was approved by the University of Kansas institutional review board as nonhuman subjects research. A pre-encounter questionnaire that included information about the benefits of FBSEs was administered to 34 patients, allowing them to identify anatomic locations that they wanted to exclude from the FBSE.

Following the patient visit (in which the identified anatomical locations were excluded), patients were given a brief exit survey that asked about (1) their preference for a pre-encounter FBSE questionnaire and (2) the impact of the questionnaire on their anxiety level throughout the encounter. Preference for asking was surveyed using a 10-point scale (10=strong preference for the pre-encounter survey; 1=strong preference against the pre-encounter survey). Change in anxiety was surveyed using a 10-point scale (10=strong reduction in anxiety after the pre-encounter survey; 1=strong increase in anxiety after the pre-encounter survey). Statistical analysis was performed using 2-tailed unpaired t tests, with P<.05 considered statistically significant.

Twenty female and 14 male patients were enrolled (mean age, 53 years)(Table). The most commonly excluded anatomical location on the pre-encounter survey was the genitals, followed by the buttocks, breasts/chest, legs, feet, and abdomen (Table); 10 (71%) male and 13 (65%) female respondents did not exclude any component of the FBSE.

The small sample size was a limitation of this study. Future studies can assess with greater precision the clear benefits of a pre-encounter survey as well as the benefits or drawbacks of a survey compared to other modalities that are aimed at reducing patient anxiety about the FBSE, such as having the physician directly ask the patient about areas to avoid during the examination.

A pre-encounter survey about the FBSE can serve as an efficient means of determining patient preference and reducing self-reported anxiety about the visit.

To the Editor:

A thorough full-body skin examination (FBSE) is an integral component of a dermatologic encounter and helps identify potentially malignant and high-risk lesions, particularly in areas that are difficult for the patient to visualize.¹ Despite these benefits, many patients experience discomfort and anxiety about this examination because it involves sensitive anatomical areas. The true psychological impact of an FBSE is not clearly understood; however, research into improving patient comfort in these circumstances can have a broad positive impact.² The purpose of this pilot study was to establish patients’ willingness to complete a pre-encounter questionnaire that defines their FBSE preferences as well as to identify the anatomical areas that are of most concern.

This study was approved by the University of Kansas institutional review board as nonhuman subjects research. A pre-encounter questionnaire that included information about the benefits of FBSEs was administered to 34 patients, allowing them to identify anatomic locations that they wanted to exclude from the FBSE.

Following the patient visit (in which the identified anatomical locations were excluded), patients were given a brief exit survey that asked about (1) their preference for a pre-encounter FBSE questionnaire and (2) the impact of the questionnaire on their anxiety level throughout the encounter. Preference for asking was surveyed using a 10-point scale (10=strong preference for the pre-encounter survey; 1=strong preference against the pre-encounter survey). Change in anxiety was surveyed using a 10-point scale (10=strong reduction in anxiety after the pre-encounter survey; 1=strong increase in anxiety after the pre-encounter survey). Statistical analysis was performed using 2-tailed unpaired t tests, with P<.05 considered statistically significant.

Twenty female and 14 male patients were enrolled (mean age, 53 years)(Table). The most commonly excluded anatomical location on the pre-encounter survey was the genitals, followed by the buttocks, breasts/chest, legs, feet, and abdomen (Table); 10 (71%) male and 13 (65%) female respondents did not exclude any component of the FBSE.

The small sample size was a limitation of this study. Future studies can assess with greater precision the clear benefits of a pre-encounter survey as well as the benefits or drawbacks of a survey compared to other modalities that are aimed at reducing patient anxiety about the FBSE, such as having the physician directly ask the patient about areas to avoid during the examination.

A pre-encounter survey about the FBSE can serve as an efficient means of determining patient preference and reducing self-reported anxiety about the visit.