68Ga-FAPI-04 Versus 18F-FDG PET/CT in a Case of Xanthogranulomatous Cholecystitis

Xanthogranulomatous cholecystitis (XGC) is an uncommon inflammatory disease of the gallbladder. We report a case of XGC with elevated activity of 18 F-FDG and 68 Ga-FAPI (fibroblast activating protein inhibitor), which mimics malignancy. Our case suggests that XGS should be considered in the differential diagnosis of cancer-like gallbladder lesions with increased 68 Ga-FAPI uptake.