Results Among the 16 cases of renal cell carcinoma with sarcomatoid transformation, 9 cases were conventional clear cell carcinoma, 3 cases were papillary renal cell carcinoma, 2 cases were chromophobic cell carcinoma, and 2 cases were collecting tubule carcinoma. 结果16例伴有肉瘤样改变的肾细胞癌中,9例为透明细胞癌,3例为乳头状肾细胞癌,2例为嫌色细胞癌,2例为集合管癌。