18 F-FDG PET/CT in Solitary Extramedullary Plasmacytoma of the Penis.

Chen, Xueqi; Chen, Guoqian; Li, Qian; Fu, Zhanli · Clin Nucl Med · 2024

case_report · Level V

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Abstract

A 72-year-old man presented with a painless penile mass for 3 months. Contrast-enhanced CT revealed heterogeneous enhancement, whereas 18 F-FDG PET/CT displayed inhomogeneous 18 F-FDG accumulation in the lesion without other abnormal activity. The histopathological examination from biopsied specimen confirmed the diagnosis of a plasmacytoma. However, the subsequent tests, including serum/urine immunofixation electrophoresis, serum/urine free light chain assay, and bone marrow smear/biopsy, did not show any abnormalities. The conclusive diagnosis was a solitary extramedullary plasmacytoma of the penis.

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