Abstract

Inverted gastric diverticula (IGD) are caused by a diverticulum inverting and protruding into the gastric lumen due to changes in gastric pressure. Here, we report a 57-year-old woman with an inverted gastric diverticulum incidentally found during a survey of the origin of upper GI bleeding. Initially, it presented as a flat, hyperemic lesion on the cardiac region, but itwas transformed into a polypoid lesion when biopsy forceps was used to grasp the edge. IGD are usually asymptomatic and found incidentally during upper gastrointestinal endoscopic examinations. There is a risk of perforation if a polypectomy or biopsy is performed near the weakened muscle layer. Since the prevalence of diverticular diseases and polyps both increases with age, it may be more common to encounter IGD and polyps during endoscopy in the elderly.