Comparison of 18 F-FDG and 68 Ga-FAPI PET/CT in a Rare Renal Leiomyoma.

Renal leiomyoma is a rare benign mesenchymal tumor of the kidney, which mainly originates from the renal capsule or pelvis. We described 18 F-FDG and 68 Ga-FAPI PET/CT findings in a case of renal leiomyoma. The PET/CT findings showed that the left renal leiomyoma demonstrated intensively increased 68 Ga-FAPI uptake, whereas only inhomogeneously slightly increased 18 F-FDG uptake. This case illustrates that 68 Ga-FAPI PET/CT may be an effective tool for detecting renal leiomyoma.