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目的 探讨GTV-T及GTV-LN对根治性同步放化疗食管鳞癌患者预后影响.方法 对肿瘤医院2012-2015年行根治性放疗的79例N1期食管鳞癌患者被纳入研究.利用Pinnacle39.0TPS计算GTV-T及GTV-LN,通过ROC评价GTV-LN/GTV-T在食管鳞癌的LR及DM预测中价值.结果 全组中位随访时间17.2个月.以GTV-LN/GTV-T测定值绘制ROC曲线,LR患者最佳诊断值为0.34,DM患者最佳诊断值为0.59.统计分析显示GTV-LN/GTV-T<0.34和≥0.34患者LR分别为50%和8%(P<0.01);GTV-LN/GTV-T<0.59和≥0.59患者DM分别为11%和43%(P=0.003).结论 GTV-LN/GTV-T或许能预测食管鳞癌患者LR及DM,关于GTV-LN/GTV-T进一步研究或许可以帮助食管鳞癌个体放化疗方案的选择.

Objective To analyze the effects of gross tumor volume(GTV-T)and positive lymph node volume(GTV-LN)on the prognosis of radical concurrent chemoradiotherapy for esophageal squamous cell carcinoma(ESCC). Methods A total of 79 patients with stage N1ESCC undergoing radical radiotherapy in our hospital from 2012 to 2015 were enrolled as subjects. GTV-T and GTV-LN were calculated by the Pinnacle39.0 treatment planning system. The receiver operating characteristic(ROC)curves were used to evaluate the value of the GTV-LN/GTV-T ratio in the prediction of local recurrence(LR)and distant metastasis(DM)of ESCC. Results The median follow-up time was 17.2 months in all patients. The ROC curves were made using the GTV-LN/GTV-T ratio. The optimal cut-off values of GTV-LN/GTV-T ratio for predicting the risk of LR and DM were 0.34 and 0.59, respectively. The statistical analysis revealed that the LR rates were 50% and 8% in patients with GTV-LN/GTV-T ratios of<0.34 and ≥0.34, respectively(P<0.01), while the DM rates were 11% and 43% in patients with GTV-LN/GTV-T ratios of<0.59 and ≥0.59, respectively(P= 0.003). Conclusions The GTV-LN/GTV-T ratio may be a predictor of LR and DM in patients with ESCC. Further studies on the GTV-LN/GTV-T ratio may help to make personalized chemoradiotherapy strategies for patients with ESCC.