Small Pouch Known as a Gastric Diverticulum

Description

Arising from the proximal stomach near the cardia, a sac-like gastric diverticulum projects beyond the normal contour of the fundus, with surrounding mucosa thrown into prominent rugae that radiate toward the outpouching. Superiorly the distal esophagus enters at the gastroesophageal junction, while inferiorly the lumen narrows through the antrum toward the pylorus and proximal duodenum. Along the curvatures, the greater curvature sweeps laterally and inferiorly in the expected J-shape, and the lesser curvature remains shorter and more medial, giving clear orientation for where the defect sits relative to the main gastric chamber. Gastric diverticula most often occur on the posterior wall of the fundus, and that location drives both symptoms and diagnostic pitfalls because retained food or secretions can cause halitosis, postprandial epigastric pain, or reflux-like complaints that get mistaken for peptic ulcer disease or a hiatal hernia. This view helps when teaching the difference between a true diverticulum (classically congenital, containing all wall layers) and an acquired pseudodiverticulum related to traction or increased intraluminal pressure, and it supports discussion of how an upper GI contrast study or endoscopy can miss a posterior fundal pouch unless the patient is positioned to fill it. Small finding, big confusion. Use this artwork in gross anatomy and GI pathophysiology courses to anchor lectures on stomach regions, rugae, and the pyloric outflow, or in radiology and endoscopy teaching files to pair with barium swallow images and endoscopic landmarks at the cardia and fundus. It also fits surgical education around indications for diverticulectomy and laparoscopic access to the posterior fundus. Anatomical accuracy verified by SciePro's Medical Advisory Board.