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A Case for Diagnosis (Nevus?). Presented by Dr. Marcus R. Caro.
C. B., a white girl aged 16, first had the present eruption at about 2 years of age. When she was examined in September 1938 there were lesions on all the present sites except for the left axilla. The patch there has developed since then. At first there was severe itching and the patient scratched a good deal, but the eruption is free from symptoms now. No pathologic changes were disclosed by a general physical examination. The Mantoux test with a dilution of 1: 1,000 gave a negative result.The cutaneous lesions are of two types. In the right axilla and on the inner surface of both arms below the axillas are circumscribed patches of lichenified dermatitis. On the inner surface of the left thigh are patches of lichenified dermatitis with outlying small follicular papules. Across the lower part