具有实体结构的嗜酸细胞性乳头状肾细胞癌3例临床病理分析

目的 探讨具有实体结构的嗜酸细胞性乳头状肾细胞癌(OPRCC)的临床病理特点、免疫表型及鉴别诊断.方法 对3例具有实体结构的OPRCC进行临床、组织形态学和免疫组化分析,并复习文献.另外选取10例经典型乳头状肾细胞癌和10例嗜酸细胞瘤作为对照.结果 3例OPRCC均为老年女性,年龄78～79岁.临床上均因体检发现.巨检:瘤组织边界清楚,2例可见包膜,切面灰褐色或棕色.镜检:瘤组织主要呈弥漫实性生长,局部可见管状、裂隙样结构和发育不全的乳头状结构;瘤细胞体积较大,圆形或多边形,胞质丰富,强嗜酸性颗粒状,核圆形或不规则,核分裂象罕见或无.2例可见局灶性坏死,1例可见泡沫状巨噬细胞,2例可见砂砾体.免疫组化:瘤细胞均呈vimentin和AMACR弥漫强(+);表达CD10和CK18不同程度(+),CK7、RCC和E-cadherin各有1例(+);所有肿瘤CD117和EMA均(-).结论 具有实体结构的OPRCC是一种非常罕见的肾细胞癌,形态学上与嗜酸细胞瘤有重叠,免疫组化染色有助于诊断和鉴别诊断.

Clinicopathologic features of oncocytic papillary renal cell carcinoma with solid architecture

Objective To study the clinicopathological features,immunophenotype and differential diagnosis of oncocytic papillary renal cell carcinoma(OPRCC) with solid architecture.Methods Three cases of OPRCC with solid architecture were investigated by clinical findings,histopathology and immunohistochemistry,and the related literature was also reviewed.Additionlly,10 cases of papillary renal cell carcinoma(PRCC) and 10 cases of oncocytoma(RO) were selected as controls.Results All 3 patients were elderly female aged...