Extraskeletal Ewing Sarcoma Involving the Abdominal Cavity and Retroperitoneum on 18F-FDG PET/CT and 68Ga-FAPI-04 PET/CT.

Lei, Qinglin; Huang, Luping; Zhou, Linjia; Xiang, Ke; Qiu, Lin · Clin Nucl Med · 2026

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Abstract

Primary extraosseous Ewing sarcoma located in the abdominal cavity and retroperitoneum is rare. We report the 18F-FDG PET/CT and 68Ga-FAPI-04 PET/CT imaging findings of intra-abdominal Ewing sarcoma. The mass showed mild FDG uptake and avid FAPI uptake.

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