Follow-up of renal oncocytoma diagnosed by percutaneous tumor biopsy

The evolution of renal oncocytoma seems to be increase of tumor size with variable velocity. Treatment must be conservative. Initial management might be nonsurgical with close follow-up. Monitoring should not miss the time of conservative surgery. Initial tumor volume or fast tumor growth are indications for surgery. Partial nephrectomy, if the tumor size and localization are reasonable, is currently the technique of choice.