Pityriasis Lichenoides
摘要
Pityriasis lichenoides is an inflammatory skin disorder of unknown etiology. There are two variants with overlapping features: (1) pityriasis lichenoides chronica (PLC) and (2) pityriasis lichenoides et varioliformis acuta (PLEVA). Febrile ulceronecrotic Mucha-Haberman disease is a severe form of PLEVA with systemic manifestations.