Ulceronecrotic nodule is seen in ?

Ans. is 'a' i.e., Lucio leprosy Lucio phenomenon It is found in lucio leprosy with type 2 lepra reaction. It is prevalent in mexico. Characterized by painful tender red patches paicularly on extremities which later on become necrotic and finally develop into brown black eschar. Ulcers are more persistent on legs. Tuberculoid and indeterminate leprosy are characterized by hyperpigmented macule with impairment of sensations. In histoid leprosy, classical feature is erythematous shiny red subcutaneous or cutaneous nodules, esp over the extensor aspect of extremities, back, buttocks & face. Ulceration is unusual.