[Skip to Navigation]
January 1989

Psoriasiform Plaque on the Buttock

Author Affiliations

Northwestern University Medical School, Chicago, and Department of Dermatology, Children's Memorial Hospital, Chicago

Arch Dermatol. 1989;125(1):117-118. doi:10.1001/archderm.1989.01670130119021

REPORT OF A CASE  A 6-year-old girl, recently adopted from Bolivia, was observed to have an asymptomatic skin lesion on her right buttock. It was not known how long this lesion had been present. A diagnosis of tinea corporis had been made prior to her arrival in the United States, but there had been no response to topical antifungal therapy. Subsequent treatment with topical steroid and tar preparations was also without benefit. She was otherwise in good health.Physical examination disclosed a 3 × 3-cm, sharply demarcated, erythematous, scaly plaque with a psoriasiform appearance on the right buttock and adjacent upper thigh (Fig 1). With the exception of viral warts on her hands, there were no other skin lesions. There was no detectable lymphadenopathy, and results of physical examination were otherwise unremarkable.Potassium hydroxide preparations and fungal culture of skin scrapings from the lesion proved negative. A skin biopsy

Add or change institution