Three patients with a preoperative impression of renal cell carcinoma received nephron-sparing surgery because of intraoperative frozen section which revealed the angiomyolipoma.

• 三位病患术前诊断为肾细胞癌因为术中冰冻切片报告是血管肌脂肪瘤而接受肾脏保留的手术方式。