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Brit J Cancer:HER2在乳腺导管原位癌中过表达的临床和生物学意义

2019-05-08 xing.T 网络

由此可见,DCIS患者中HER2阳性的频率与IBC和HER2阳性DCIS患者相当,其与预后不良的特征相关。DCIS患者中大多数HER2过表达是由基因扩增所致。

之前的研究报道高达50%的原位导管癌(DCIS)为HER2阳性,但HER2阳性浸润性乳腺癌(IBC)的发生率较低。近日,肿瘤领域权威杂志British Journal of Cancer上发表了一篇研究文章,该研究的目的是归纳DCIS中HER2状态并评估其预后价值。 

在大量DCIS患者(n=868)中评估HER2状态,包括与IBC相关的纯DCIS和DCIS,制备为组织微阵列(TMA)。使用免疫组织化学(IHC)和显色原位杂交(CISH)评估HER2状态。 

在纯DCIS患者中,HER2蛋白在9%的DCIS患者中过表达(3+),而15%患者是HER2可疑的(2+)。使用CISH,最终HER2状态为阳性占20%。在混合DCIS患者中,DCIS组分的HER2扩增被检测到15%,侵入组分中的扩增仅为12%。HER2阳性DCIS与侵袭性特征(p<0.0001)和更频繁的局部复发(p=0.03)相关。在多变量分析中,联合HER2/Ki67检测是局部复发的独立预测因子(p=0.006)。

由此可见,DCIS患者中HER2阳性的频率与IBC和HER2阳性DCIS患者相当,其与预后不良的特征相关。DCIS患者中大多数HER2过表达是由基因扩增所致。 

原始出处:

Islam M. Miligy,et al.The clinical and biological significance of HER2 over-expression in breast ductal carcinoma in situ: a large study from a single institution.British Journal of Cancer.2019.https://www.nature.com/articles/s41416-019-0436-3

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