[Pityriasis rubra pilaris diagnostic and therapeutic difficulties about 9 cases]

The pityriasis rubra pilaris is a quite rare erythematosquarnous dermatosis characterized by a follicular hyperkeratosis with perifollicular erythema Nine cases have been collected at the department of dermatology of Ibn Rochd University Hospital in Casablanca over 17 years. The classic type I of the adult has been the most frequent, the classic juvenile form has been noticed in one case. This study emphasizes the diagnostic and therapeutic difficulties of this dermatosis