摘要目的 探讨 IMRT 技术下局限期 SCLC 放化疗疗效及预后分析.方法 回顾分析2006—2014年于本中心行放化疗的484例局限期SCLC患者临床资料.IMRT有效者行PCI.采用Kaplan?Meier法计算生存率,Logrank检验进行单因素分析,Cox模型进行多因素分析.结果 全组随访率为93%,中位OS期23.8个月,2、3、5年OS率分别为48.7%、39.8%、28.6%,中位PFS期14.1个月,2、3、5年PFS 率分别为34.4%、30.5%、28.3%.SCLC 患者 IMRT 后≥3级骨髓抑制发生率26.9%,≥2级放射性食管炎发生率24.8%,≥2级放射性肺炎发生率18.4%.治疗客观有效率84.5%.单因素分析显示年龄、吸烟史、TNM 分期、PCI、放疗前化疗周期数是预后影响因素(P=0.006、0.001、0.047、0.000、0.046),多因素分析显示吸烟史、PCI 是影响预后的因素(P=0.001、0.000).结论 IMRT技术下局限期SCLC放化疗取得了较好疗效,吸烟史、PCI是局限期SCLC的预后影响因素.

abstractsObjective To investigate the clinical efficacy and prognosis of intensity-modulated radiotherapy(IMRT)combined with chemotherapy for limited-stage small cell lung cancer(LS-SCLC). Methods A retrospective analysis was performed on the clinical data of 484 LS-SCLC patients treated with chemoradiotherapy in our center from 2006 to 2014. The patients with partial or complete response to IMRT received prophylactic cranial irradiation(PCI). The Kaplan?Meier method was used to calculate survival rates, and the log-rank test and Cox regression were used for univariate and multivariate analyses, respectively. Results In all the patients, the follow-up rate was 93%;the median overall survival(OS) time was 23.8 months;the 2-,3-,and 5-year OS rates were 48.7%,39.8%,and 28.6%,respectively;the median progression-free survival(PFS)time was 14.1 months;the 2-, 3-, and 5-year PFS rates were 34.4%,30.5%, and 28.3%, respectively. The incidence rates of grade ≥3 bone marrow suppression, grade ≥2 radiation esophagitis, and grade ≥2 radiation pneumonitis were 26.9%, 24.8%, and 18.4%, respectively, in SCLC patients after IMRT. The objective response rate was 84.5%. The univariate analysis showed that age, smoking history, TNM stage, PCI, and the number of chemotherapy cycles before radiotherapy were prognostic factors for OS(P= 0.006, 0.001, 0.047, 0.000, and 0.046). The multivariate analysis showed that smoking history and PCI were independent prognostic factors(P=0.001 and 0.000).Conclusions IMRT combined with chemotherapy achieves satisfactory clinical outcomes in the treatment of LS-SCLC. Smoking history and PCI are independent prognostic factors for OS of LS-SCLC patients.