[Porokeratosis ptychotropica with mycotic superinfection in a 68-year-old man].

Abstract

Porokeratosis ptychotropica is a very rare subtype of porokeratosis, which is a heterogeneous group of inherited keratinization disorders. It is associated with verrucous, extensive hyperkeratotic plaques in the perigenital, gluteal, and inguinal regions. Histologically, porokeratosis exhibits the pathognomonic hallmark known as cornoid lamellae. Treatment results are generally disappointing and recurrence rates are high.