Enfermedad de Mucha Habermann asociada a artritis reumatoide

acute varioliform lichenoides pityriasis or mucha haberman disease is a rare cutaneous affection of unknown etiology, probably autoimmune, characterized by popular lesions of acute appearance with formation of pseudovesicles with central necrosis, sometimes with a trend to crusts. this is the case of a woman aged 36 with a history of rheumatoid arthritis admitted due to a cutaneous systemic eruption with formation of vesicles over erythematous arrangement, some underwent coalescence with crusts, a moderate pruritus and fever up to 39.2o; skin biopsy confirmed this diagnosis, skin lesions improve in a evolutionary way but with digital infarction typical of small vessels vasculitis supporting the polemic hypothesis of vascular origin. patient evolved favourably with symptomatic treatment because of the disease has a self-limited and generally benign course.