Extensive ulnar nerve necrosis: a complication of tuberculoid leprosy.

Pure neural leprosy without cutaneous manifestations is a relatively rare manifestation of leprosy. It can present as a mono- or poly-neuritis with sensory and/or motor impairment. Neural leprosy may or may not be associated with thickening of the involved nerve. We report the case of a 14 year old boy with extensive ulnar nerve necrosis who was diagnosed to have tuberculoid leprosy. What makes this case unique is that we have here a case of pure neural leprosy with a single nerve turned 'necrotic'.