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Hard Nodular Plaque on the Scalp.

A 35-year-old man presented to the dermatology clinic with a slow-growing plaque on the scalp of 10 years’ duration. The lesion was mildly pruritic and was never associated with any pain or discharge. He denied antecedent trauma or infection. A hard, erythematous, nodular, alopecic plaque with punctate hyperkera-tosis on the left posterior temporal and parietal scalp was noted on physical examination. The lesion was slightly tender to palpation.