"Diffuse Hot Pleura" in a Case of Primary Undifferentiated Small Round Cell Sarcoma on 18 F-FDG PET/CT.

Zhao, Xiaoyi; Guo, Xin; Liang, Huan; Zhao, Guoxing; Xie, Peng · Clin Nucl Med · 2026

case_report · Level V

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Abstract

Undifferentiated small round cell sarcoma (USRCS) is a rare and aggressive tumor. Primary USRCS of pleura is extremely uncommon. We describe 18 F-FDG PET/CT findings in a case of pleural USRCS. PET/CT revealed diffuse elevated activity in the right pleura. Finally, the pathology confirmed the diagnosis of USRCS.

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