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Tuberculosis of the Skin. Presented by Dr. H. E. Michelson, Minneapolis.
A man, aged 45, stated that he had received an injury thirty years previously over the right eyebrow; that, aside from the scar, he had had no difficulty until a year before presentation, when a nodule formed, which enlarged peripherally until at the time of presentation the lesion was oval, measuring about 1 by 2 cm. The lesion was very firm, with a rolled edge, of a yellowish-brown color and covered with an adherent crust. The biopsy showed a dense infiltrate of epithelioid cells, with an occasional giant cell, and there was marked necrosis in the center of a similar smaller area of infiltrate. The Wassermann reaction was negative; stains for tubercle bacilli were negative. The Pirquet reaction was indeterminate. The microscopic section was suggestive of tuberculosis. There was no axillary adenitis. On account of the chronicity, the microscopic