Abstract

背景与目的非小细胞肺癌(non-small cell lung cancer, NSCLC)中表皮生长因子受体(epidermal growth factor receptor, EGFR)常见单突变患者临床特征研究已经得到广泛认可,女性、无或少吸烟史、腺癌患者中发生率高,经EGFR酪氨酸激酶抑制剂(tyrosine kinase inhibitors, TKIs)治疗后客观缓解率(objective response rate, ORR)和无进展生存期(progression-free survival, PFS)显著延长。但针对EGFR双突变患者的临床特征以及对EGFR-TKIs治疗的敏感性研究尚不明确。本研究探讨了EGFR双突变患者的临床特征及EGFR-TKIs治疗的疗效。方法收集2015年1月1日-2016年12月31日就诊于青岛大学附属医院接受EGFR基因检测的1, 238例原发性NSCLC患者,存在单一突变患者603例,双突变患者59例。所有基因均统一采用ARMS-PCR技术检测。对已明确具体基因分型的32例双突变患者进行基因分析,并随机选取60例单突变患者与59例双突变患者临床特征进行对照,同时比较晚期EGFR双突变和单突变患者对EGFR-TKIs治疗的疗效。结果EGFR双突变患者中以合并罕见单突变基因最为常见(30/32)。双突变与单突变患者在性别、吸烟史、年龄、病理类型、肿瘤-淋巴结-转移(tumor-node-metastasis, TNM)分期等方面无显著性差异。在接受EGFR-TKIs治疗的双突变患者中,ORR为36.80%,疾病控制率(disease control rate, DCR)为68.40%,中位PFS为6.0个月,单突变患者中ORR为60.00%,DCR为90.00%,中位PFS为12.0个月,两组PFS比较有显著性差异(P=0.003)。结论EGFR双突变患者的临床特征与单突变患者之间无显著性差异,双突变患者接受一代EGFR-TKIs治疗的ORR、DCR、PFS均较单突变患者低。

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