Annual Scientific Meeting
Introduction: The difference in long-term outcomes of endoscopic submucosal dissection (ESD) and endoscopic mucosal resection (EMR) for Barrett’s related superficial neoplasia remains unclear. We aimed to compare the rates of local and metachronous recurrence of ESD and EMR in patients with clinically staged BE-associated high-grade dysplasia (HGD) and T1a esophageal adenocarcinoma (EAC).
Methods: Multicenter study at six academic hospitals in the U.S. including patients who underwent ESD for BE-HGD or T1a EAC. Primary outcome was a composite of metastasis and local recurrence rate. A time-to-event analysis was performed to evaluate recurrence. A Kaplan-Meier plot was constructed, and a log-rank test was used to compare the groups. A Cox hazard ratio regression analysis was performed to identify predictors of recurrence.
Results: A total of 241 patients were included. 154 underwent EMR, while 84 underwent ESD (Table 1). ESD had higher en bloc (96% vs 33%, p< .0001), R0 (76% vs 54%, p=0.0009) and curative resection rates (75% vs 32% , p< .0001) when compared to EMR. The 24-month local recurrence rate for EMR and ESD was 43% and 11%, respectively (p=.0007) (Figure 1). Significantly more endoscopic resection procedures were required to treat recurrence after EMR compared to after ESD (Table 1). EMR, piecemeal resection, positive margins, and non-curative resection were identified as predictors of recurrence on univariate analysis. En bloc resection remained significant after multivariate analysis (Table 2).
Discussion: This multicenter study showed that ESD results in more definitive treatment of BE-associated early neoplasia than EMR, with significant lower recurrence rates and less need for repeat endoscopic therapeutic procedures than EMR.