J Cancer 2018; 9(3):584-593. doi:10.7150/jca.20940 This issue
1. Department of Radiation Oncology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China;
2. Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA;
3. National Office for Cancer Prevention and Control, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China;
4. Department of VIP Medical Services, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
Purpose: This meta-analysis was aimed to evaluate the role of postoperative concurrent chemoradiotherapy (post-CCRT) for esophageal cancer patients after surgery.
Methods: We systematically searched PubMed, PMC, EMBASE, Cochrane Central Register of Controlled Trials, Chinese National Knowledge Infrastructure and Wanfang databases. Studies which compared CCRT with non-CCRT treatment for esophageal cancer patients after surgery were eligible. Outcomes of interest were odds ratios (OR) for overall survival (OS), local-regional recurrence rate, distant metastasis rate and adverse-event rate.
Results: Thirteen studies with 2165 patients were included in this meta-analysis. Post-CCRT significantly improved OS for esophageal cancer patients. Comparing the CCRT group with the non-CCRT one, the OR and 95% confidence interval (CI) for 1-year, 3-year and 5-year OS were 1.66 [1.30-2.11], 1.50 [1.24-1.81] and 1.54 [1.22-1.94], respectively. The local-regional recurrence rate was significantly reduced in the CCRT group (OR=0.58, 95% CI=0.46-0.72), but no significant difference was observed in the distant metastasis rate between the CCRT and non-CCRT groups (OR=0.94, 95% CI=0.68-1.30). Post-CCRT didn't increase the risk of pneumonitis, anastomotic stenosis or severe hematologic toxicities. Mild esophagitis in the CCRT group was increased but could be well tolerated.
Conclusions: This meta-analysis based on the largest-scale of published literature confirms that post-CCRT yields significant survival benefit and improves local-regional control with tolerable toxicity for patients with esophageal carcinoma.
Keywords: esophageal carcinoma, postoperative concurrent chemoradiotherapy, survival, recurrence, toxicity, meta-analysis