Vedolizumab for the Treatment of Collagenous Gastritis

연구 개요

The goal of this clinical trial is to learn about how vedolizumab may affect patients with collagenous gastritis (CG). The main questions it aims to answer are: * Whether vedolizumab can reduce CG symptoms * Whether vedolizumab is safe to take for patients with CG Participants in this study will: * Receive vedolizumab through an IV ("infusion") * Complete a survey at each infusion visit * Have blood collected at each infusion visit * Undergo an endoscopy with biopsy at 2 timepoints