Objective:To investigate the diagnostic and therapeutic features of renal oncocytoma(RO).Method:The clinical data of 35cases(19males and 16females)with RO from October 2004 to September 2014 were analyzed retrospectively.Their average age was 52.1(range,23-80)years old.Nineteen tumors were located in the left kidney and 16 were in the right kidney.The tumors averaged 5.3cm in diameter(range,2-12)cm.Three cases of RO and 32 cases of renal cancer were diagnosed preoperatively by CT.Three cases underwent retro...