Bilateral renal metastasis from intracranial solitary fibrous tumor/hemangiopericytoma revealed on F-FDG PET/CT and contrast-enhanced CT.

Bilateral renal metastasis for solitary fibrous tumor/hemangiopericytoma (SFT/HPC) is very rare. Herein, we reported a 40-year-old man whose postoperative diagnosis was intracranial SFT/HPC. Fluorine-18-fluorodeoxyglucose positron emission tomography/computed tomography (F-FDG PET/CT) and contrast-enhanced CT showed homogeneous enhancement of the bilateral renal mass with mild F-FDG uptake of maximum standardized uptake value (SUVmax) of 3.17. Subsequently, this patient underwent surgery treatment and pathology supported the metastasis of SFT/HPC from central nervous system (CNS). Our case hints us that contrast-enhanced F-FDG PET/CT might be a better one-stop diagnostic procedure for extra-cranial metastases in SFT/HPC patients, and bilateral renal mass with a history of SFT/HPC should consider the possibility of metastasis.