68 Ga-FAPI Versus 18 F-FDG PET/CT in Recurrent Undifferentiated Pleomorphic Sarcoma of Colon Mesentery.

Zhang, Linqi; Liu, Zhidong; Jiang, Shuqin; He, Qiao; Zhang, Rusen · Clin Nucl Med · 2022

case_report · Level V

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Abstract

A 56-year-old woman presented with primary undifferentiated pleomorphic sarcoma of colon mesentery underwent complete surgical resection approximately 7 months ago. Abdominal contrast-enhanced CT showed a new mass in the descending colon, suggesting a high probability of tumor recurrence. Under a clinical trial, the patient underwent 68 Ga-FAPI and 18 F-FDG PET/CT to detect whether there are additional recurrent lesions. Compared with 18 F-FDG PET/CT, the recurrent undifferentiated pleomorphic sarcoma of colon mesentery, peritoneum, pelvic lymph node, and lung metastases showed higher uptake in 68 Ga-FAPI PET/CT. This case showed that 68 Ga-FAPI might be a promising radiopharmaceutical in the evaluation of undifferentiated pleomorphic sarcoma.

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