多中心食管鳞状细胞癌提高三维放疗剂量临床疗效分析——3JECROG R-03

目的 比较食管鳞状细胞癌行根治性放疗不同放疗剂量对生存的影响,并探讨预后影响因素。方法 回顾性分析2002-2016年中国10所医疗中心2344例接受根治性放化疗/放疗的食管鳞状细胞癌患者临床资料,经1∶2倾向性评分配比(PSM),根据放疗剂量分为低剂量组(EQD2Gy<60Gy)303例,高剂量组(EQD2Gy≥60Gy)606例。Kaplan-Meier法生存分析,Cox模型多因素预后分析。结果 中位随访时间为59.6个月。经PSM配比后,低剂量组和高剂量组的1、3、5年总生存率分别为66.5%、34.7%、27.2%和72.9%、41.7%、34.7%(P=0.018),无进展生存率分别为52.2%、27.2%、23.1%和58.3%、38.1%、33.9%(P=0.001)。单因素结果显示颈段/胸上段食管癌、临床分期早、无区域淋巴结转移、病变长度短、采用IMRT技术、接受同步化疗、EQD2Gy≥60Gy为总生存获益因素(均P<0.05)。多因素结果显示肿瘤部位、有无区域淋巴结转移、是否接受同步化疗以及EQD2Gy是影响总生存的重要因素(均P<0.05)。结论 局部晚期食管鳞状细胞癌患者应用三维适形或调强放疗EQD2Gy≥60Gy时生存获益。

Clinical efficacy of dose escalation in 3-dimensional radiotherapy for patients with esophageal squamous cell carcinoma-multicenter retrospective analysis (3JECROG R-03)

Objective To evaluate the effect of definitive radiotherapy with different doses on overall survival (OS) and identify the prognostic factors of patients with non-metastatic esophageal squamous cell carcinoma (ESCC). Methods Clinical data of 2344 ESCC patients treated with definitive radiotherapy (RT) alone or chemoradiotherapy from 2002 to 2016 in 10 hospitals were collected and analyzed retrospectively. After the propensity score matching (PSM)(1 to 2 ratio), all patients were divided into the low-dose group (equivalent dose in 2Gy fractions,EQD2Gy<60 Gy;n=303) and high-dose group (EQD2Gy≥60 Gy;n=606) based on the dose of radiation. Survival analysis was conducted by Kaplan-Meier method. Multivariate prognostic analysis was performed by Cox′s regression model. Results The median follow-up time was 59.6 months. After the PSM, the 1-, 3- and 5-year overall survival (OS) rate was 66.5%,34.7%,27.2% in the low-dose group, 72.9%,41.7% and 34.7% in the high-dose group, respectively (P=0.018). The 1-, 3-and 5-year progression-free survival rate was 52.2%,27.2%,23.1% in the low-dose group, 58.3%,38.1% and 33.9% in the high-dose group, respectively (P=0.001). The outcomes of univariate analysis indicated that cervical/upper esophagus location, early (stage Ⅱ) AJCC clinical stage, node negative status, tumor length ≤5 cm, receiving intensity-modulated radiation therapy (IMRT), receiving concurrent chemotherapy and EQD2Gy≥60Gy were closely associated with better OS (all P<0.05). Multivariable analysis demonstrated that tumor location, regional lymph node metastasis, concurrent chemotherapy and EQD2Gy were the independent prognostic factors for OS (all P<0.05). Conclusion Three-dimensional conformal or IMRT with EQD2Gy≥60Gy yields favorable survival outcomes for patients with locally advanced ESCC.