EGFR-TKI一线治疗不同EGFR突变状态晚期非小细胞肺癌疗效分析

目的：分析表皮生长因子受体酪氨酸酶抑制剂（EGFR-TKI）一线治疗不同EGFR突变状态（外显子19缺失、21突变）晚期非小细胞肺癌（NSCLC）的疗效。方法收集徐州市肿瘤医院经组织病理学证实的EGFR突变阳性晚期NSCLC患者72例，分析两种不同EGFR突变状态与一线EGFR-TKI治疗的客观缓解率（ORR）、疾病控制率（DCR）、无进展生存期（PFS）以及总生存期（OS）之间的关系。结果72例患者均进行EGFR基因检测，其中37例为EGFR19外显子缺失，35例为EGFR21外显子突变。72例患者均可评价疗效，其中EGFR19外显子缺失的患者ORR 75．7％，DCR 89．2％；EGFR21外显子突变的患者ORR 51．4％，DCR 68．6％，差异均有统计学意义（χ2＝4．583，P＝0．032；χ2＝4．636，P＝0．031）。EGFR19外显子缺失和21外显子突变的患者校正后的中位PFS分别为13．2个月、10．8个月，差异有统计学意义（χ2＝4．700，P＝0．030）；中位OS分别为30．2个月、25．6个月，差异有统计学意义（χ2＝4．686，P＝0．030）。两组间不良反应无明显差别，皮疹最为常见，两组差异无统计学意义（48．7％∶48．6％，χ2＝0．000，P＝0．995）。结论 EGFR突变状态是晚期NSCLC患者一线EGFR-TKI治疗疗效和OS的预测因素，EGFR19外显子缺失患者的疗效优于EGFR21外显子突变患者。

Association between EGFR mutation status and efficacy of first-line EGFR-TKI in patients with ;advanced non-small cell lung cancer

Objective To evaluated the effect of first-line epidermal growth factor receptor tyrosine kinase inhibitor (EGFR-TKI)on advanced non-small cell lung cancer (NSCLC)patients with different EGFR mutation status (exon 1 9 deletion and exon 21 mutation).Methods Seventy-two advanced NSCLC patients with EGFR mutation confirmed by histopathology were enrolled.All of the patients received first-line EGFR-TKI.The relationships between EGFR mutation status and objective response rate (ORR),disease control rate (DCR),progression free survival (PFS ) and overall survival (OS ) were analyzed.Results Of the 72 patients,37 patients expressed exon 1 9 deletion,35 patients expressed exon 21 mutation,and all of them could be evaluated.The ORR and DCR of patients with exon 1 9 deletion were higher than those of patients with exon 21 mutation (75.7%vs.51 .4%,χ2 =4.583,P=0.032;89.2%vs.68.6%,χ2 =4.636,P=0.031 ).The modified median PFS of patients with exon 1 9 deletion was significantly higher than that of patients with exon 21 mutation (1 3.2 month vs.1 0.8 month,χ2 =4.700,P=0.030).The median OS of patients with exon 1 9 deletion was significantly higher than that of patients with exon 21 mutation (30.2 month vs.25.6 month,χ2 =4.686,P=0.030).The side effects were similar between the two groups.The most common adverse reaction was rash,and the incidence had no significant difference between the two groups (48.7% vs.48.6%,χ2 =0.000,P=0.995 ).Conclusion EGFR mutation status is a predictor for PFS,OS and ORR of first-line EGFR-TKI in patients with advanced NSCLC.NSCLC patients with EGFR exon 1 9 deletion are associated with longer survival time and better response rate compared with those with exon 21 mutation.