A case of linear porokeratosis with penile localization

Abstract

Porokeratosis (PK), a disorder of epidermal keratinization with a unique clinical appearance, is characterized histopathologically by the presence of cornoid lamella. Many different clinical forms of PK have been described i.e., classical plaque-type PK of Mibelli, disseminated superficial actinic PK, linear PK, PK palmaris et plantaris disseminata, and punctate PK. Linear PK is a rare variant of PK presenting with slightly scaly atrophic papules following Blaschko's lines. Additionally, PK confined to the genital area is also an uncommon condition. Both genital and linear PK are extremely rare and only one case of genital linear PK has been reported in the literature. Here, we report the case of a patient with penile linear PK who was treated with diclofenac sodium gel and imiquimod cream but did not recover. (Turkderm 2014; 48: 160-2)