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广泛的分支乳头状结构以及管状-囊状成分,肿瘤细胞核级别高,重叠。管状-囊状肾细胞癌是新近认识的乳头状肾细胞的形态学亚型,可与II型乳头状肾细胞癌并存,从前的名字包括集合管上皮瘤,低级别集合管癌等,免疫表型及分子遗传学研究表明其为乳头状肾细胞癌的变异,7,17号染色体三体性及Y染色体丢失,而与集合管癌无关。免疫组化表达CK7及AMACR与集合管不同。
本例可诊断为:Type-II 乳头状肾细胞癌伴管状-囊状肾细胞癌特征。
可参考文献:
1,Amin MB, MacLennan GT, Gupta R,,Tubulocystic carcinoma of the kidney: clinicopathologic analysis of 31 cases of a distinctive rare subtype of renal cell carcinoma.Am J Surg Pathol. 2009 Mar;33(3):384-92.
2.Zhou M, Yang XJ, Lopez JI.Renal tubulocystic carcinoma is closely related to papillary renal cell carcinoma: implications for pathologic classification.Am J Surg Pathol. 2009 Dec;33(12):1840-9.
3.Yang XJ, Zhou M, Hes O,Tubulocystic carcinoma of the kidney: clinicopathologic and molecular characterization.Am J Surg Pathol. 2008 Feb;32(2):177-87.