PET/CT Findings of a Solid Pseudopapillary Tumor Mimicking Adrenocortical Carcinoma.

Jiang, Zhenpeng; Shan, Huimin; Li, Jingfa; Xiao, Yayi; Zhu, Xusheng · Clin Nucl Med · 2025

case_report · Level V

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Abstract

Solid pseudopapillary tumor (SPT) is a rare low-grade malignant neoplasm originating predominantly in the pancreas. Extra-pancreatic SPTs are exceedingly rare clinical entities. The 18 F-FDG PET/CT imaging features of extra-pancreatic SPTs remain poorly characterized in the current literature. We present a diagnostically challenging case of left adrenal SPT demonstrating MRI and 18 F-FDG PET/CT features indistinguishable from adrenocortical carcinoma, ultimately resulting in preoperative misdiagnosis.

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