Successful Treatment of Pityrosporum Folliculitis with Isotretinoin

Pityrosporum Folliculitis (PF) is a condition characterized by pruritic 1-2 mm monomorphic follicular papules and pustules on the upper back, chest and shoulders. PF is caused by overgrowth of Malassezia furfur, a commensal yeast found in the infundibulum of sebaceous glands and may be exacerbated by immunosuppression, occlusion and sweating. We present a case of PF with inadequate response to both topical and systemic antifungal therapy, which completely cleared on isotretinoin.