食管癌同期放化疗不同放疗剂量远期疗效分析

目的 比较食管癌同期放化疗不同放疗剂量的LC、长期OS及临床不良反应情况。方法 选取2004—2013年间本院接受同期放化疗的373例食管鳞癌患者,根据放疗剂量分为<60 Gy组99例、60 Gy组155例、>60 Gy组119例。采用Kaplan-Meier法计算LC、OS率并Logrank检验和单因素预后分析,Cox模型多因素预后分析。结果 放疗剂量<60 Gy组,60 Gy组和>60 Gy组3、5、7、10年样本量分别为97、96、56、38例,146、141、72、17例和118、115、56、20例,其LC率分别为55.3%、51.4%、48.9%、48.9%,65.1%、60.1%、55.1%、55.1%和49.4%、45.1%、37.7%、37.7%(8年)(P=0.020);OS率分别为35.4%、26.1%、22.0%、22.0%,49.0%、41.3%、32.1%、28.9%和31.1%、25.2%、14.5%、12.9%(8年)(P=0.000)。单因素分析结果显示肿瘤体积≤44 cm³、Ⅰ—Ⅱ期患者60 Gy组LC率优于<60 Gy组(P=0.040、0.035),而OS率则优于其他两组(P=0.001、0.003,P=0.045、0.006);而对于肿瘤体积>44 cm³、Ⅲ期患者60 Gy组LC率优于>60 Gy组(P=0.011、0.015),OS率优于其他两组(P=0.045、0.006,P=0.033、0.002)。>60 Gy组RE、RP发生率高于其他两组(P=0.007、0.033)。多因素分析结果显示放疗剂量及非手术T分期、N分期是预后影响因素(P=0.004、0.008、0.037)。结论 食管癌同期放化疗剂量以60 Gy为优,接受>60 Gy放疗剂量患者不良反应显著增加。

Long-term efficacy of concurrent chemoradiotherapy at different radiotherapy doses in treatment of esophageal carcinoma

Objective To compare the local control (LC), long-term overall survival (OS), and clinical adverse reactions in esophageal carcinoma patients receiving concurrent chemoradiotherapy at different radiotherapy doses.Methods A total of 373 esophageal carcinoma patients who received concurrent chemoradiotherapy in our hospital during 2004-2013 were included in this retrospective study.These patients were divided into<60 Gy group (n=99), 60 Gy group (n=155), and>60 Gy group (n=119) based on the dose of radiation.The Kaplan-Meier method was used to calculate LC and OS rates;the log-rank test was used for survival comparison and univariate prognostic analysis;the Cox model was used for multivariate prognostic analysis.Results The 3-, 5-, 7-, and 10-year sample sizes were 97,96,56, and 38 in the<60 Gy group, 146,141,72, and 17 in the 60 Gy group, and 118,115,56, and 20 in the>60 Gy group.The 3-, 5-, 7-, and 10-year LC rates were 55.3%, 51.4%, 48.9%, and 48.9% in the<60 Gy group, 65.1%, 60.1%, 55.1%, and 55.1% in the 60 Gy group, and 49.4%, 45.1%, 37.7%, and 37.7%(8-year) in the>60 Gy group (P=0.020).The 3-, 5-, 7-, and 10-year OS rates were 35.4%, 26.1%, 22.0%, and 22.0% in the<60 Gy group, 49.0%, 41.3%, 32.1%, and 28.9% in the 60 Gy group, and 31.1%, 25.2%, 14.5%, and 12.9%(8-year) in the>60 Gy group (P=0.000).The univariate analysis showed that for stage Ⅱ esophageal carcinoma patients with gross tumor volume (GTV) ≤44 cm3, the LC rate was higher in the 60 Gy group than in the<60 Gy group (P=0.040,0.035), and the OS rate was higher in the 60 Gy group than in the other two groups (P=0.001,0.003 and P=0.045,0.006).Similarly, for stage Ⅲ esophageal carcinoma patients with GTV>44 cm3, the LC rate was higher in the 60 Gy than in the>60 Gy group (P=0.011,0.015), and the OS rate was higher in the 60 Gy group than in the other two groups (P=0.045,0.006 and P=0.033,0.002).The incidence rates of acute radiation esophagitis and radiation pneumonia were significantly higher in the>60 Gy group than in the other two group (P=0.007,0.033).Furthermore, the multivariate analysis indicated that radiotherapy dose, T stage, and N stage were independent prognostic factors for esophageal carcinoma (P=0.004,0.008,0.037).Conclusions Concurrent chemoradiotherapy at 60 Gy is most efficacious for patients with esophageal carcinoma, and the radiotherapy dose of>60 Gy significantly increases the incidence of adverse reactions.