ARCH PATHOL LAB MED:HER2双原位杂交的相关性及注意事项

2020-11-30 MedSci原创 MedSci原创

准确的HER2检测对乳腺癌的精确治疗至关重要。HER2检测通常是通过免疫组织化学和原位杂交技术的结合来完成的,因为基因扩增与蛋白质的过度表达密切相关。

准确的HER2检测对乳腺癌的精确治疗至关重要。HER2检测通常是通过免疫组织化学和原位杂交技术的结合来完成的,因为基因扩增与蛋白质的过度表达密切相关。在过去的5年多时间里,在一些实验室,Brightfield双原位杂交(DISH)已经取代了荧光方法(荧光原位杂交[FISH])。本研究回顾了在外部实验室进行HER2 DISH的经验,并推荐给患者护理。

在273个确定的回顾性DISH结果中,55个在我们机构进行了重复FISH测试;7例(13%)不一致。其他案例存在技术缺陷,妨碍了适当的评分。23例(42%)HER 2 DISH未进行免疫组化。对42例连续DISH病例的前瞻性队列的幻灯片审查显示,14例(33%)存在潜在危害结果的技术或解释限制。常见的问题包括大多数肿瘤细胞缺乏信号或信号微弱,以及细胞核外的银沉淀或红色信号,分别导致假阴性或假阳性解释。此外,44%(55份中的24份)的DISH报告缺乏完整的数据,特别是平均HER2信号/细胞。

尽管HER2 DISH可以作为FISH的高效替代品,但还存在一些问题,并强调了对载玻片质量和技术参数应谨慎关注。 HER2 DISH与免疫组织化学的共同测试可以帮助最大程度地减少假阴性或假阳性HER2结果。

原始出处:

Megan Troxell, MD, PhDRichard K. Sibley, MDHER2 Dual In Situ Hybridization: Correlations and Cautions

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