Objectives: Endoscopic resection (ER) has been rapidly adopted in the treatment of early-stage esophageal cancer. We aimed to compare the outcomes of ER with esophagectomy for patients with small-sized (≤2 cm) stage T1a and T1b esophageal cancer in a population-based cohort.
Methods: We queried the Surveillance, Epidemiology, and End Results database for patients with T1N0M0 esophageal cancer who underwent ER or esophagectomy and generated a balanced cohort with 217 matched pairs using propensity score matching (PSM). Kaplan-Meier method and multivariable Cox regression analysis were employed to investigate the matched cohort. Subgroup analyses of T stage were also performed.
Results: We identified 702 patients; 309 (44.0 %) underwent ER, and 393 (56.0 %) underwent esophagectomy. In the unmatched cohort, patients who underwent ER were older, more likely to have a T1a stage, and less likely to receive lymph node sampling. In the entire matched cohort, multivariate analysis found esophagectomy were associated with better overall survival (OS) (HR: 0.62, 95 % CI: 0.40-0.96, p = 0.032) than ER, but no significant difference in esophageal cancer-specific survival (ECSS) (HR: 1.37, 95 % CI: 0.64-2.96, p = 0.420) between the two procedures. The results were similar for subgroup analyses of stage T1b patients. However, ER and esophagectomy were associated with similar OS (HR: 0.74, 95 % CI: 0.41-1.36; p = 0.334) and ECSS (HR: 3.69, 95 % CI: 0.95-14.39; p = 0.060) in patients with stage T1a disease.
Conclusions: In patients with stage T1 esophageal cancer, ER was similar to esophagectomy in terms of oncologic outcomes. More prospective studies should be implemented to determine the optimal treatment for T1b esophageal cancer patients with risk factors.
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