Citation, DOI, disclosures and article data
Citation:
Morgan M, Niknejad M, Baba Y, et al. Gastric antral web. Reference article, Radiopaedia.org (Accessed on 20 Feb 2025) https://doi.org/10.53347/rID-38622
Gastric antral webs are a ring of mucosa in the distal stomach (gastric antrum) that can lead to gastric outlet obstruction. A circumferential ring of mucosa has also been termed a "gastric antral diaphragm".
Gastric antral webs are rare. There is an association with trisomy 21 and immunodeficiency syndromes.
Fluoroscopy
- smooth, thin narrowing of the gastric antrum, ~2 cm from the pylorus
- if the web is large, it may result in the appearance of a "double duodenum"
Treatment and prognosis
The web may lead to gastric outlet obstruction. Symptomatic webs may be removed with upper endoscopy 3.
- gastric carcinoma
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pyloric stenosis (longer channel length than a web)
- distal gastrospasm 4
- redundant gastric mucosa 4
- hypertrophic gastric rugae 4
- heterotrophic pancreatic tissue 4
- cholecystogastrocolic bands 4
- perigastric adhesions 4
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1. Felson B, Berkmen YM, Hoyumpa AM. Gastric mucosal diaphragm. Radiology. 1969;92 (3): 513-7. doi:10.1148/92.3.513 - Pubmed citation
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2. Cho KJ. Gastric antral diaphragm. Gastrointest Radiol. 1976;1 (1): 37-40. doi:10.1007/BF02256340 - Pubmed citation
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3. Salah W, Baron TH. Gastric antral web: a rare cause of gastric outlet obstruction treated with endoscopic therapy. Gastrointest. Endosc. 2013;78 (3): 450. doi:10.1016/j.gie.2013.07.009 - Pubmed citation
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4. Morales SJ, Nigam N, Chalhoub WM, Abdelaziz DI, Lewis JH, Benjamin SB. Gastric antral webs in adults: A case series characterizing their clinical presentation and management in the modern endoscopic era. (2017) World journal of gastrointestinal endoscopy. 9 (1): 19-25. doi:10.4253/wjge.v9.i1.19 - Pubmed
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