“…The renal leiomyoma is a rare benign mesenchymal tumor of the kidney, which is usually asymptomatic and occasionally painful 1,2 . 18 F-FDG PET/CT imaging findings for leiomyomas of the nasal, 3 duodenal, 4 rectal, 5 uterine, 6 esophageal, and genital 7 have been reported in some previous literature, and these leiomyomas demonstrated varying degrees of 18 F-FDG uptake. Currently, fibroblast activating protein (FAP)–specific PET tracers have been reported for imaging various types of renal malignant and benign diseases 8–16 .…”