Extramedullary Plasmacytoma of the Retroperitoneum Detected on 18 F-FDG PET/CT.

Deng, Yan; Deng, Ying; Zhang, Wei; Lei, Xiaoping · Clin Nucl Med · 2024

case_report · Level V

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Abstract

Solitary retroperitoneal extramedullary plasmacytoma is a rare neoplasm. A 67-year-old man presented with abdominal pain and left leg weakness. Abdominal CT revealed a large mass in the left retroperitoneum, which demonstrated increased metabolic activity on subsequent 18 F-FDG PET/CT imaging. Furthermore, the patient's serum protein electrophoresis showed positive M-protein results. Pathological examination of the biopsied specimen confirmed the diagnosis of extramedullary plasmacytoma.

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