Abstract：Objective: To discuss the clinical, imageological and pathological features of renal oncocytoma （RO） and to improve the diagnosis and treatment level. Methods: From 2014 to 2019 in Huaihe Hospital of Henan University, the clinical data of 7 patients with RO were analyzed retrospectively, and all were diagnosed with renal cell carcinoma preoperatively. Four cases underwent radical nephrectomy （2 cases given laparoscopic surgery and 2 cases given open surgery）, and 3 cases received partial nephrectomy. Results: Four tumors were on the left, and three on the right. The maximum diameter of tumor was 3.5-12 （mean 6.7） cm. The 7 patients recovered well, and postoperative pathological results confirmed the diagnoses of RO in all cases. Seven cases were followed up for 15-54 （median 42） months, and recurrence or metastasis was not found. Conclusions: RO is a rare benign tumor with clinical features that are not typical and need to be differentiated from renal malignant tumors. The exact diagnosis is based on pathological findings. Nephronsparing surgery should be the optimal choice and regular review and follow-up are needed.
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