Gastric Antral Web as an Uncommon Cause of Gastric Outlet Obstruction in an Adult Female Patient: A Case Report of a Rare Medical Condition and a Review of the Literature

Gastric antral web (GAW) is a rare congenital or acquired mucosal anomaly characterized by a membranous septum within the gastric antrum and represents an uncommon cause of gastric outlet obstruction (GOO), particularly in adults.Due to its nonspecific clinical presentation, it is often underdiagnosed and may lead to delayed management.We report the case of a previously healthy adult female patient who presented with progressive epigastric pain and early postprandial fullness.Physical examination and laboratory findings were unremarkable.Upper gastrointestinal endoscopy revealed a membranous structure in the antral region causing significant luminal narrowing, consistent with a GAW.A contrast study demonstrated delayed gastric emptying with passage of contrast through a narrowed aperture.Given the severity of the obstruction, the patient underwent subtotal gastrectomy with gastrojejunostomy.The procedure was uneventful, and postoperative imaging confirmed normal contrast passage without leakage or obstruction.The patient was discharged on postoperative day 2 and remained asymptomatic at the two-month follow-up.GAW remains a rare etiology of GOO, with clinical manifestations varying according to the degree of luminal narrowing.Diagnosis relies primarily on endoscopy and imaging, though a high index of suspicion is essential.Management options range from conservative measures to endoscopic and surgical interventions, with surgery remaining the definitive treatment in cases of significant obstruction.GAW should therefore be considered in the differential diagnosis of GOO in adults, as early recognition and appropriate management are crucial to prevent complications and ensure favorable outcomes, given the rarity of this condition.