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Postoperative adjuvant three-dimensional conformal radiotherapy improves long-term survival in patients with pathological T2-3N0M0 esophageal cancer
Yang Jinsong*, Zhang Wencheng, Xiao Zefen, Zhou Zongmei, Zhang Hongxing, Chen Dongfu, Feng Qinfu, He Jie, Gao Shugeng, Sun Kelin, Liu Xiangyang, Fang Dekang, Mu Jyuwei, Wang Dali
*Department of Radiation Oncology, Cancer Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College,Beijing 100021,China
Abstract Objective To assess the clinical value of three-dimensional conformal radiotherapy (3DRT) in postoperative adjuvant therapy after initial radical surgery for pathological T2-3N0M0 thoracic esophageal squamous cell carcinoma (pT2-3N0M0 TESCC). Methods The recurrence, survival, and radiotherapy adverse events in 96 patients with pT2-3N0M0 TESCC who received adjuvant 3DRT after radical surgery from a prospective nonrandomized phase Ⅱ clinical study from 2004 to 2011 were compared with those in 820 patients undergoing surgery alone. The survival rate was determined by the Kaplan-Meier method and analyzed using the log-rank test. Multivariate prognostic analysis was performed using the Cox proportional hazard model. Results Postoperative 3DRT group had a significantly higher ratio of patients with tumor length ≥5 cm and stage T3 than surgery alone group. The 5-year sample sizes for the postoperative 3DRT and surgery alone groups were 35 and 270, respectively. The 5-year overall survival (OS) and disease-free survival (DFS) rates for the postoperative 3DRT versus surgery alone group were 74.3% vs. 59.9%(P=0.010) and 71.0% vs. 51.7%(P=0.002), respectively. Multivariate analysis revealed that 3DRT was independently associated with an improved OS (P=0.030) and DFS (P=0.004). The overall recurrence rate, locoregional recurrence rate, and distant metastasis rate in the postoperative 3DRT group versus surgery alone group were 22.9% vs. 43.0%(P=0.000), 18.8% vs. 35.2%(P=0.001), and 11.5% vs. 21.3%(P=0.024), respectively. Both early and late grade 3 adverse events developed in 25 patients (26.0%) in the postoperative 3DRT group. Conclusions Compared with surgery alone, postoperative adjuvant 3DRT reduces the recurrence rate and improves the 5-year DFS and OS with tolerable adverse effects in patients with pT2-3N0M0 TESCC. Prospective randomized phase Ⅲ clinical study is still needed.
Corresponding Authors:
e Jie,Department of Thoracic Surgery,Email:prof.hejie@263.net;Xiao Zefen,Department of Radiation Oncology,Email:xiaozefen@sina.com
Cite this article:
Yang Jinsong,Zhang Wencheng,Xiao Zefen et al. Postoperative adjuvant three-dimensional conformal radiotherapy improves long-term survival in patients with pathological T2-3N0M0 esophageal cancer[J]. Chinese Journal of Radiation Oncology, 2015, 24(2): 101-105.
Yang Jinsong,Zhang Wencheng,Xiao Zefen et al. Postoperative adjuvant three-dimensional conformal radiotherapy improves long-term survival in patients with pathological T2-3N0M0 esophageal cancer[J]. Chinese Journal of Radiation Oncology, 2015, 24(2): 101-105.
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