[Polyarthritis and papular eruption revealing leprosy].

Leprosy is generally revealed by cutaneous lesions often associated to nerve impairment. Rarely, it may be revealed by polyarthritis. The diagnosis, often delayed in the cutaneous-nevritic form because of the low prevalence of the disease in metropolitan France, is very difficult in case of rheumatic presentation. We report the case of a 28 year-old woman from Mali, who was diagnosed with lepromatous borderline leprosy with reversal reaction occurring in the postpartum as she presented with polyarthritis and skin lesions.