Gastric Diverticulum

 Diverticulum in the fundus of the stomach, seen at
 retroflexion (the shaft of the endoscope is seen descending
 through the esophagogastric junction at the 12 o'clock
 position). The diverticulum was an incidental finding in an
 72 year-old woman undergoing endoscopy.

 Gastric diverticula are extremely rare and may be
 congenital or acquired. When symptomatic, gastric
 diverticula may cause pain, nausea, dysphagia, and
 vomiting. Gastric diverticula may also be associated with
 ectopic mucosa, ulcers, and neoplastic changes.

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Fundic Diverticulum.

 Diverticulum in the fundus of the stomach, seen at
 retroflexion.

 A gastric diverticulum is an unusual anomaly of the
 alimentary tract. Of the two types, congenital and
 acquired, the former is far more common. The majority of
 congenital diverticula protrude from the posterior gastric
 wall just inferior to the gastroesophageal junction. While
 most gastric diverticula are asymptomatic, some are
 associated with epigastric discomfort that can be medically
 controlled. A distinct minority result in devastating
 complications such as perforation or hemorrhage. The
 preoperative diagnosis of a bleeding gastric diverticulum
 mandates aggressive lavage and thorough endoscopy of
 the stomach to include a retroflexed view of the cardiac
 portion of the stomach. Surgical amputation of the bleeding
 juxtacardiac diverticulum is the treatment of choice.

Antral Diverticula.

Prepyloric Deformities.

Shows prepyloric pseudodiverticulum. This may result from previous duodenal ulceration causing an adhesion to form between the bulb and the antrum.

Antral Bands.

 Generally, without clinical implication, but peculiar
 endoscopic image that resemble a duplicated pylorus.