Antral Diaphragm or Web

•     A membrane with a variably-sized opening in the antrum of the stomach

•     May occur from 3 months to 80 years

•     Histologically

            • Mucosa around a central core of submucosa and muscularis mucosae

•     Usually no inflammation of the web itself

•     Usually located from 1 to 1.5 cm proximal to pyloric canal

Imaging

            • Persistent, thin, band-like deformity perpendicular to the long axis of the antrum

            • Usually 2-3 mm thick

            • Associated ulcers are found in 30-50% of patients

•     Rx: May be intentionally ruptured with an endoscope