Eur J Cancer:EGFR突变型肺癌的组织学转化概率及临床病程

2022-03-18 xiaozeng MedSci原创

约3%的对EGFR-TKI获得性耐药的EGFR突变的非小细胞肺癌患者会发生组织学转换

肺癌是全球癌症相关死亡的首要原因。非小细胞肺癌(NSCLC)约占所有肺癌的80%;大部分病例首次确诊时已发生转移,丧失手术机会。据报道,约50%的亚洲晚期NSCLC患者携带EGFR基因酪氨酸激酶结构域的体细胞激活突变。

本研究是一项多中心、回顾性的队列研究,纳入了2012年至2019年期间接受EGFR酪氨酸激酶抑制剂(TKI)治疗的EGFR突变的晚期肺癌患者,旨在明确有组织学转换的EGFR突变的肺癌的发生率和临床病程。主要评估指标是组织转换的发生率。次要指标是有组织转换的患者的治疗效果。

不同情况患者的无进展生存期或总生存期

总体上,共招募了6356位患者。2624位患者在对EGFR-TKI产生了获得性耐药后活检明确了组织学类型,其中74位存在组织学转换(发生率 2.8%)。对EGFR-TKI产生了获得性耐药后的中位无进展生存期是10.4个月;发生了组织学转换后首次治疗后的中位无进展生存期是4.4个月,组织学转换的方向(转换成高级别神经内分泌癌或另一种非小细胞肺癌)对患者的生存期无明显影响。确认组织学转换后的总生存期是12.2个月。

组织学转换后或根据有无组织学转换分组的接受ICI治疗后的无进展生存期

27位患者接受免疫检查点抑制剂治疗,其中确认组织学转换前6例,确认组织学转换后21例。无患者获得1年无进展生存期。证实HT后接受免疫检查点抑制剂治疗后的中位无进展生存期为1.6个月。

综上,约3%的对EGFR-TKI获得性耐药的EGFR突变的非小细胞肺癌患者会发生组织学转换。遗憾的是,免疫检查点抑制剂在这类患者中的治疗效果有限。

原始出处:

Fujimoto Daichi,Akamatsu Hiroaki,Morimoto Takeshi et al. Histologic transformation of epidermal growth factor receptor-mutated lung cancer.[J] .Eur J Cancer, 2022, 166: 41-50.

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肺癌丨EGFR突变靶向治疗系列研究汇总(2021年12月)

从现有的数据看,晚期NSCLC患者的联合治疗策略似乎并不适用于奥希替尼