Abstract：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.
Ren Xuejiao,Wang Lan,Han Chun et al. Long-term efficacy of concurrent chemoradiotherapy at different radiotherapy doses in treatment of esophageal carcinoma[J]. Chinese Journal of Radiation Oncology, 2017, 26(9): 1006-1011.
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