objective:To summarize the experience in diagnosis and treatment of 11 cases of renal oncocytoma.Methods:The clinical data of 11 cases of renal oncocytoma confirmed surgically and pathologically were analyzed ret?rospectively. The literatures about this disease were reviewed.Results:Two patients were treated with radical ne?phrectomy. Partial nephrectomy was performed on the rest 9 cases. Pathologically,the diagnosis of renal oncocytoma was made after surgery. After a median follow-up period of 26 months(7 to 60 months),there was no recurrence or metastasis from oncocytoma.Conclusion:Renal oncocytoma is a rare benign tumor,and difficult to differentiate from renal cancer with asymptomatic symptom and image examination. The diagnosis can be established on radiological im?aging techniques,renal mass biopsy and immunohistochemistry.