Lepromatous leprosy presenting with type II reaction before and type I reaction after treatment.

Lepromatous leprosy is associated with a high bacillary load and poor cellular immune response. Early dermatologic manifestations include erythematous macules, papules, nodules, and plaques with a symmetrical distribution. Leprosy also shows two major reaction states including type I (reversal reaction) and type II (vasculitis). These reactions are usually seen in some patients who are undergoing treatment. Herein, we report an interesting patient with lepromatous leprosy who presented with skin lesions of type II reaction without receiving any anti-leprosy treatment and surprisingly showed a type I reaction eight months after the beginning of the treatment.