临床结果和人类表皮生长因子受体2-向治疗的有效性 乳腺癌与不常见的现场杂交模式或不一致的免疫组织化学
Qianchen Zhang1, Jincong Q Freeman2,3, Fangyuan Zhao2
1Committee on Computational and Applied Mathematics, The University of Chicago, Chicago, IL.
JCO oncology advances
|September 12, 2025
概括
针对HER2的治疗有利于患有经典的HER2+或ASCO/CAP组2乳腺癌的患者. 然而,在某些不和或弱放大HER2病例中观察到有限的益处,需要替代治疗策略.
科学领域:
- 在瘤学瘤学.
- 分子诊断学 分子诊断
- 临床病理学 临床病理学
背景情况:
- 人体表皮生长因子受体2 (HER2) 向疗法改善了HER2阳性 (HER2+) 乳腺癌患者的治疗结果.
- 关于这些疗法的有效性存在不确定性,在异调免疫组织化学 (IHC) 和现场杂交 (ISH) 结果或特定ASCO/美国病理学家学院 (CAP) ISH分类 (2-4组) 的情况下.
研究的目的:
- 评估HER2向治疗在HER2+乳腺癌患者的疗效,IHC和ISH结果各不相同,包括不一致的病例和特定的ASCO/CAP ISH组.
- 为了比较不同的接受 HER2 向治疗的 HER2 亚组之间的病理完整响应 (pCR) 率.
主要方法:
- 从国家癌症数据库 (2013-2021) 追溯分析了144,013名患者的IHC和双探针ISH测试.
- 病例分类为经典的HER2+,HER2-,异调的ISH/IHC,以及特定的ASCO/CAP ISH组 (2,3,4).
- 与 HER2-对照组相比,在接受 HER2-向治疗的子组中计算pCR的调整几率比率 (aOR).
主要成果:
- 经典的HER2+和ASCO/CAP组2病例在HER2向治疗时显示出明显更高的pCR率 (aOR分别为2.9和2.38).
- 在ASCO/CAP组3 (aOR 1.63) 和不一致的ISH+/IHC-病例 (aOR 1.61) 中观察到益处,特别是在较高的HER2/CEP17比率或副本数量的情况下.
- 在ASCO/CAP4组ISH病例或ISH-/IHC+病例中没有发现显著的益处.
结论:
- 针对HER2的治疗在经典的HER2+和ASCO/CAP组2乳腺癌中显示出显著的益处.
- 患有ASCO/CAP组4,异调的ISH-/IHC+,或弱放大组3和异调的ISH+/IHC-HER2状态的患者从目前的HER2向治疗中获得的益处有限.
- 应考虑替代性治疗策略,对于 HER2 向治疗的益处有限的患者.
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