Course: Multiple Erythematous-Violaceous Patches and Plaques on the Left Upper Arm and Left Side of the Chest
CME Credits: 1.00
Released: 2023-05-03
An otherwise healthy female patient in her late 20s was seen with a 2-year history of multiple, slowly growing, infiltrated erythematous-violaceous patches and plaques, with occasional slight pain extending from her left upper arm to the left side of her chest. No triggers, such as local infection, insect bite, or trauma, occurred before the appearance of the lesions. She denied fever, weight loss, or fatigue. Physical examination showed multiple firm, nonscaly, purple erythematous patches and plaques with irregular borders on her left axilla, medial upper arm, and lateral thoracic region (, A). No extracutaneous involvement was observed. A skin biopsy specimen was obtained from the left side of her chest for histopathological examination (, B and C).
Educational Objective
Based on this clinical scenario and the accompanying image, understand how to arrive at a correct diagnosis.
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