ILEP Technical Bulletin 9 : The management of erythema nodosum leprosum (ARCHIVED)

Immunologically mediated episodes of acute or subacute inflammation known as a reaction, may occur in any type of leprosy except indeterminate. Unless reactions are promptly and adequately treated they can result in permanent deformity. Most reactions belong to one of two major types, erythema nodosum leprosum (ENL) or type 2 reaction or reversal reaction (type 1 reaction).