Ten-year survivals of right thoracic versus left thoracic approach for esophageal cancer

Abstract

Esophagectomy can be performed using various surgical techniques. The aim of this study was to understand the impact of surgery on long-term survival for esophageal cancer. Between May 2010 and July 2012, 300 patients with esophageal cancer were randomly assigned to undergo esophagectomy with either left or right thoracic approach. Disease-free survival (DFS) and overall survival (OS) were compared based on the per-protocol principle among 286 patients with esophageal squamous cell carcinoma determined by postoperative pathology (146 in the right and 140 in the left thoracic arms). The median DFS was 92 months in the right and 41 months in the left thoracic arms (hazard ratio, 0.73; 95% confidence interval, 0.54-0.99; P=0.045), with a cumulative 10-year DFS of 47.6% and 37.5%, respectively. The median OS was 136 months in the right and 99 months in the left thoracic arms (hazard ratio, 0.75; 95% confidence interval, 0.54-1.04; P=0.081), with cumulative 10-year OS rates of 52.4% and 43.7%, respectively. DFS and OS were comparable between the two arms for patients without lymph node metastasis. Conversely, for patients with lymph node metastasis, 10-year DFS were 32.7% and 21.4%, respectively (P=0.018), and 10-year OS of the right and left thoracic arms were 37.9% and 25.9%, respectively (P=0.012). Compared to the left thoracic approach, patients who underwent esophagectomy via the right thoracic approach had better 10-year survival rates, and the survival benefit was significant for those with lymph node metastasis.