Disseminated superficial porokeratosis involving the groin and genitalia in a 72-year-old immunocompetent man

Abstract

The porokeratoses are a group of disorders of abnormal epidermal keratinization resulting in the characteristic histologic feature of the cornoid lamella. Several clinical variants of porokeratosis exist, which are unified by this common histologic feature but differ in morphology, distribution, and clinical course. The typical lesions of porokeratosis are characterized by an atrophic center surrounded by an elevated keratotic rim formed by the cornoid lamella. The lesions can be found almost anywhere on the body; however, the groin and genitalia are rarely involved. We report an unusual presentation of a rare clinical variant,