Course: Indurated Plaque With Ulceration on the Dorsum of the Left Hand
CME Credits: 1.00
Released: 2022-11-09
A man in his 70s presented with a 6-month history of a rash on the left forearm, which gradually increased in severity. The patient developed a rash on the dorsal aspect of his hand half a year ago without any pain or itching discomfort and denied any history of injury or exposure to suspected pathogens prior to onset. After self-medication with topical herbal medicine, the lesions gradually spread to the forearm and fused into plaques, and ulcers often recurred on the surface. He denied any systemic symptoms and concerns. Physical examination revealed large, firm, mildly swollen erythematous plaques on the back of the left forearm with purulent discharge and crusting (, A). Results of routine laboratory investigations, including complete blood cell count, biochemical profile, and chest radiography, were normal. A biopsy specimen was taken for pathological examination (, B-D).
Educational Objective
Based on this clinical scenario and the accompanying image, understand how to arrive at a correct diagnosis.
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