285 Predictors of Subsquamous Intestinal Metaplasia (SSIM) in Patients With Prior Radiofrequency Ablation (RFA) for Treatment of Barrett's Esophagus: Results From the U.S. RFA Registry

Abstract

Subsquamous intestinal metaplasia (SSIM) is defined as metaplastic columnar tissue found beneath an overlying layer of intact squamous epithelium. SSIM occurs in >25% of those with dysplastic Barrett's esophagus (BE), and in 5% or more of patients following radiofrequency ablation (RFA) for BE. We assessed the predictors of SSIM in a nationwide RFA registry.