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PSORIASIS. Presented by Dr. Weidman.
The patient, a white man, aged 33, had been under observation ten days. He had an outbreak of psoriasis with a seborrheiform distribution, the lesions being of guttate size. The case was presented to demonstrate linear lesions appearing along a scratch. There was a history of the patient receiving a scratch on the abdomen from a pin in his clothing and subsequently the disease developed along the scratch mark. The tar ointment with which the patient was treated had removed the scales, and the lesions were less conspicuous than when first seen. He was taking arsenic internally.
DISCUSSION
Dr. Weidman added that he had seen lichen planus and warts develop along scratch marks but he had never noted it in psoriasis.Dr. Schamberg remarked that the condition was not infrequent. A few years ago he had conducted experiments along this line. Abrasions had been made