marginal ulcer
An ulceration that develops at the gastrojejunal anastomosis following Roux-en-Y gastric bypass surgery.
Full Definition
Marginal ulcers are peptic ulcerations that occur at the junction between the gastric pouch and jejunum (gastrojejunal anastomosis) after Roux-en-Y gastric bypass. These ulcers develop in 1-16% of patients and can cause abdominal pain, nausea, vomiting, and bleeding. Risk factors include smoking, NSAIDs, large pouch size, and Helicobacter pylori infection. Diagnosis is typically made by upper endoscopy, and treatment involves acid suppression, smoking cessation, and avoidance of irritating substances. Refractory cases may require surgical revision.
Usage
Usage note: Specifically refers to ulcers at bypass anastomosis, not general gastric ulcers.
In Context
- "Upper endoscopy revealed a 5mm marginal ulcer at the gastrojejunal anastomosis with active bleeding." — endoscopy report
- "The patient's chronic abdominal pain was attributed to marginal ulcer formation, likely related to continued smoking." — gastroenterology consultation