Psoriasiform lupus vulgaris with 30 years duration.

Lupus vulgaris is a progressive form of cutaneous tuberculosis occurring in a person with a moderate to high degree of immunity. It is the most common type of cutaneous tuberculosis. Lupus vulgaris can be mimicked by several other skin conditions, and a 69-y-old female is described with an extremely long history of extensive infiltrative skin lesions with abundant scaling. The lesions were localized on the right arm and forearm, and on the right lateral surface of the chest. The diascopic test was positive. Moreover, a large atrophic scar was seen in the region of right cubital fossa resulting in contracture of the right elbow joint. The histopathology strongly suggested the diagnosis of tuberculosis. The final diagnosis of tuberculosis was confirmed by PCR examination. A polychemotherapeutic regimen (ethambutol 1250 mg/d, rifampicin 600 mg/d and isoniazid 300 mg/d) was successfully employed for the treatment of skin lesions.