Comparison of 18F-FDG and 18F-FAPI PET/CT Findings of Signet-Ring Cell Carcinoma of the Stomach

Abstract A 66-year-old man with gastric signet-ring cell carcinoma underwent both 18 F-FDG and 18 FAl-NOTA-FAPI PET/CT imaging. There was no abnormal FDG activity in the stomach, but there was diffuse intense 18 FAl-NOTA-FAPI uptake in the known lesion and an adjacent metastasis.