Modern Pathology:反极性乳头状肾细胞癌中鉴定了复发性KRAS突变

2020-01-27 AlexYang MedSci原创

综合性的分子分析阐释了乳头状肾细胞肿瘤(PRCC)是一种异质性的实体瘤。反极性乳头状肾肿瘤(PRNRP)是PRCC的子集,具有自身的特征组织形态,比如低等级的核特征,倒置的核位置,嗜酸性的细胞质,以及懒惰的临床行为。最近,有研究人员通过比较1型PRCC(PRCC1)和2型PRCC(PRCC2)尝试确定了PRNRP的分子、临床病理、组织学混合免疫组化特征。研究共包括了30个PRNRP案例,23个PR

综合性的分子分析阐释了乳头状肾细胞肿瘤(PRCC)是一种异质性的实体瘤。反极性乳头状肾肿瘤(PRNRP)是PRCC的子集,具有自身的特征组织形态,比如低等级的核特征,倒置的核位置,嗜酸性的细胞质,以及懒惰的临床行为。

最近,有研究人员通过比较1型PRCC(PRCC1)和2型PRCC(PRCC2)尝试确定了PRNRP的分子、临床病理、组织学混合免疫组化特征。研究共包括了30个PRNRP案例,23个PRCC1案例和26个PRCC2案例。研究发现,30个PRNRPs案例中共检测到了28个案例具有复发性KRAS突变。然而,在PRCC1案例和PRCC2案例中没有发现KRAS变异。PRNRP表现出了不同的临床病理特征:包括小的肿瘤体积,更低的病理性T阶段和跟踪调查期间无疾病特异性死亡。组织学上,研究人员观察到了观察到了瘤周淋巴样聚集,突出的乳头状结构(>80%的肿瘤),透明的乳头状结构,倒置的核位置和较低的核级。另外,PRNRP在CK7、AMACR、EMA和E-钙粘蛋白检测时通常为阳性,CD10通常为阴性。

最后,研究人员指出,他们的发现表明了PRNRP是乳头状肾肿瘤的一种亚型,并且考虑到分子、临床病理、组织学和免疫组化特性时,与PRCC1和PRCC2是不同的类型。

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    2020-01-30 yb6560
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    2020-01-29 yinhl1978
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    2020-01-29 bioon7

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肾细胞癌(简称肾癌)是泌尿系统中恶性程度较高的肿瘤,也是最常见的肿瘤之一,又称肾腺癌,占肾恶性肿瘤的80%~90%。据调查,肾细胞癌在我国泌尿生殖系统肿瘤中占第二位,仅次于膀胱肿瘤,占成人恶性肿瘤的2%~3% 、小儿恶性肿瘤的20%左右。男女发病率有明显差异,据统计,男女之比为2:1。肾细胞癌的发病率随年龄增大而升高,有资料显示,肾细胞癌的高发年龄在40~55岁。此外,肾细胞癌发病率有明显的国