尽管大多数肾癌通过组织学特征能够得到准确诊断,但是一些肾癌之间形态学的重叠使其亚型分类变得困难。虽然一些肾癌表现为乳头状结构,但是大部分由透明细胞组成,无法将他们分为透明细胞肾细胞癌还是乳头状肾细胞癌。作者分析了14例具有乳头状结构并含一定数量透明细胞的肾癌的 Although most renal cancers can be accurately diagnosed by histological features, some morphological overlaps between renal cancers make it difficult to classify their subtypes. Although some renal cancers show papillary structures, most are composed of clear cells that can not be classified as clear cell renal cell carcinoma or papillary renal cell carcinoma. The authors analyzed 14 cases of papillary renal cell carcinoma with a certain number of clear cells