Course: Left Shoulder Fungating Mass in a 46-Year-Old Man
CME Credits: 1.00
Released: 2023-06-15
A 46-year-old man presented with a left shoulder mass. It began with a quarter-size maculopapular lesion and continued to progress during the next 3 years. He reported limited shoulder movements and denied other symptoms. There was no medical or surgical history, and he had a negative personal or familial oncologic history. The patient was a construction worker and used tobacco daily. On physical examination, there was a 24?×-15-cm fungating, necrotic, and ulcerated left shoulder mass (A). A punch biopsy showed sheets of highly pleomorphic atypical spindle and epithelial cells within the superficial and deep dermis, extending into the subcutaneous tissue, and with 18 mitoses/mm2. Immunohistochemistry demonstrated SOX10-positive and pankeratin-negative tumor cells. A whole-body positron emission tomographic and computed tomographic scan revealed an intensely hypermetabolic left shoulder mass and multiple hypermetabolic enlarged left axillary lymph nodes, with no distant metastases (B). Brain magnetic resonance imaging was negative for intracranial metastasis.
Educational Objective
Based on this clinical scenario and the accompanying image, understand how to arrive at a correct diagnosis.
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