Altered barrier function is a part of celiac disease (CeD) pathophysiology that we currently cannot reliably measure. Catheter-based mucosal integrity (MI) is an endoscopic technology that has identified altered esophageal barrier function in esophageal disease.1 The aim of this study was to evaluate feasibility, safety, and clinical utility of measuring duodenal integrity with an MI catheter in patients with and without CeD.
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