Cutaneous tuberculosis mimicking sporotrichosis.

The authors describe an unusual presentation of lupus vulgaris in a 5-year-old boy. The lesions had a linear arrangement with proximal spread mimicking sporotrichosis. Histopathology of the lesions revealed tuberculoid granulomas. Tubercular etiology was confirmed by the demonstration of acid fast bacilli in the smears from the regional lymph node aspirate stained with Ziehl Neelsen stain, and growth of Mycobacterium tuberculosis in the aspirate culture. The patient showed marked improvement of his lesions on anti-tubercular treatment.