[An unusual case of erythema nodosum leprosum]

An unusual manifestation of erythema nodosum leprosum (ENL) in a female, 24 years old, whose clinical history and picture was suggestive of acute systemic erythematous lupus rather than hanseniasis is described and commented. The diagnosis of ENL was attained only after it was demonstrated the presence of AAR bacilli in the ulcerated lesions.