目的:探讨既往脑部放疗对奥希替尼治疗携有EGFR突变的非小细胞肺癌脑转移患者的临床价值,为临床治疗决策提供参考.方法:回顾性分析2013年10月-2020年8月我院一线、二线应用奥希替尼治疗EGFR敏感突变的NSCLC脑转移患者资料,收集患者基本信息、脑部放疗方式、EGFR突变位点及疾病进展等情况,根据在应用奥希替尼治疗前是否行脑部放疗分为既往放疗组与未行放疗组,应用χ2检验及Fisher精确概率法对两组基线进行对比,应用Kaplan-Meier法行生存分析.结果:共纳入患者132例,其中既往放疗组44例,未行放疗组88例.中位随访时间20.3个月.既往放疗组与未行放疗组中位无进展生存期为9.3个月(95％CI 7.9～10.7个月)与11.6个月(95％CI 8.4～14.9个月),P=0.085.颅内无进展生存期(iPFS)为15.3个月(95％CI 10.5～20.2个月)与16.1个月(95％CI 13.0～19.2个月),P=0.286.中位总生存期(OS)在既往放疗组为24.3个月(95％CI 19.5～29.0个月),而在未行放疗组中至研究截止日期,累计死亡概率未达到0.5,无法计算中位生存期,P=0.429.既往放疗组与未行放疗组颅内客观缓解率(iORR)分别为52.3％和53.4％,P=0.902.结论:既往脑部放疗对奥希替尼治疗携有EGFR敏感突变的非小细胞肺癌脑转移患者的PFS、iPFS、OS、iORR均无明显差异,因此,针对携带有EGFR敏感突变的非小细胞肺癌脑转移的患者在应用三代EGFR-TKI药物以前行脑部放射治疗的价值需要进一步探讨,同时放射治疗作为治疗脑转移的局部治疗手段在何时应用会给患者带来生存获益仍需进一步扩大样本研究.

Objective:To investigate whether radiotherapy should be delivered before the application of immune checkpoint inhibitor PD-1 in patients with advanced non-small cell lung cancer (NSCLC) and evaluate the effect of previous radiotherapy on the efficacy and pulmonary toxicity of PD-1 inhibitor.Methods:Clinical data of patients with stage Ⅳ NSCLC who received immunotherapy in Henan Cancer Hospital from March 2015 to September 2019 were retrospectively analyzed. The baseline data of patients, the status of radiotherapy and immunotherapy and the pulmonary toxicity were collected. According to whether radiotherapy was given before PD-1 inhibitor application, all patients were divided into the previous radiotherapy and non-radiotherapy groups. Survival analysis was performed by Kaplan- Meier method. Results:A total of 90 patients were enrolled including 39 cases in the previous radiotherapy group and 51 cases in the non-radiotherapy group. The median follow-up time was 22.9 months. The median progression-free survival (mPFS) in the previous radiotherapy group was 7.5 months (95% CI 5.4-9.5 months), significantly longer compared with 4.1 months (95% CI 3.1-5.1 months) in the non-radiotherapy group ( P=0.003). The median overall survival (mOS) significantly differed between two groups[15.2 months (95% CI 12.3-18.1 months) vs. 9.3 months (95% CI 6.1-12.5 months)]( P=0.040). The incidence of pulmonary toxicity showed no significant difference between two groups ( P=0.154). Conclusions:Patients with stage Ⅳ NSCLC patients in the previous radiotherapy group obtain significantly better mPFS and mOS and similar pulmonary toxicity compared with their counterparts in the non-radiotherapy group. Nevertheless, the findings remain to be validated by subsequent investigations with larger sample size.

Objective:To evaluate the value and identify the prognosic factors of postoperative radiotherapy (PORT) in completely resected stage Ⅲ(pN 2) lung adenocarcinoma patients with epidermal growth factor receptor (EGFR) wild-type who received adjuvant chemotherapy. Methods:Clinical data of 172 patients with stage Ⅲ(pN 2) EGFR wild-type lung adenocarcinoma who underwent radical resection and adjuvant chemotherapy from 2009 to 2016 were retrospectively analyzed. All patients received platinum-based adjuvant chemotherapy combining two drugs for>4 cycles, and divided into the PORT group and the non-PORT group. The survival rate was calculated by Kaplan- Meier method and log-rank test, and multivariate prognostic analysis was performed by Cox’s regression model. Results:Among 172 patients, the median overall survival (OS), 3-year and 5-year OS rates were 40 months, 55.9% and 28.3%, respectively. The median disease-free survival (DFS), 3-year and 5-year DFS rates were 17 months, 24.5% and 13.0%, respectively. DFS was significantly improved in the PORT group (29 months vs. 13 months, P=0.001), whereas OS did not significantly differ between two groups (51 months vs. 38 months, P=0.151). In subgroup analysis, DFS of patients with multistation N 2 or the number of N 2 metastases of≥3 or skip N 2 in the PORT group was significantly longer ( P<0.05), whereas PORT exerted no significant effect on OS ( P>0.05). Conclusions:For patients with completely resected stage Ⅲ(N 2) EGFR wild-type lung adenocarcinoma receiving adjuvant chemotherapy, PORT might increase DFS and have a trend toward longer OS. However, these findings remain to be validated by large sample size investigations.