临床上通常将直径≤3cm的肾癌称为小肾癌,占同期肾癌发病的8.7%～25.4%[1-2]。近年来,随着人们健康意识的提高,以及超声、CT等影像学检查方法的广泛应用,小肾癌检出率逐步提高,其中无临床症状偶然发现的小肾癌占61%～86%[3]。小肾癌通常被认为是早期病变,若能及时切除,不但预后良好,部分病 Clinically, the diameter of renal cell carcinoma is usually less than 3cm called small renal cell carcinoma, accounting for the same period, the incidence of renal cell carcinoma 8.7% to 25.4% [1-2]. In recent years, with the improvement of people’s health awareness, as well as ultrasound, CT and other imaging methods widely used, the detection rate of small kidney cancer gradually increased, of which no clinical symptoms occasionally found small kidney cancer accounted for 61% to 86% [ 3]. Small renal cell carcinoma is usually considered early lesions, if promptly removed, not only a good prognosis, some diseases