Key Takeaways
- Clinical Bottom Line
- The Invisible Arterial Threat
Clinical Bottom Line
| Pathological Feature | Endoscopic Diagnostic Visual | Primary Therapeutic Rescue |
|---|---|---|
| Aberrant Submucosal Artery | A massive, caliber-persistent artery poking through a tiny mucosal defect. | Mechanical Clipping (TTS) or Over-The-Scope Clip (OTSC). |
| Classic Location | Lesser curvature of the proximal stomach (within 6cm of the GE junction). | Bipolar cautery and epinephrine are frequently insufficient for this high-pressure blowout. |
The Invisible Arterial Threat
Unlike a standard peptic ulcer, which presents as a massive, cratered inflammation, a Dieulafoy’s lesion is anatomically deceptive. It is a large, “caliber-persistent” artery that fails to taper as it reaches the mucosal surface. When the tiny overlying mucosa wears thin, the artery ruptures directly into the stomach, triggering a catastrophic, high-pressure arterial sprout without any warning.
The Diagnostic Challenge
During an emergency EGD, a Dieulafoy’s lesion often appears as a perfectly normal-looking stomach until the blood is irrigated away to reveal a microscopic, pin-sized mucosal defect with a pulsating, “spurting” arterial column. Standard thermal therapies (like BICAP) frequently fail because the artery is too massive for superficial charring to seal. The 2026 gold standard is strictly mechanical: slamming the vessel shut with heavy-duty hemoclips or a “bear claw” OTSC to physically crush the artery against the gastric wall, permanently terminating the hemorrhage.
Clinical guidelines summarized by the Gastroscholar Research Team. Last updated: 2026. This article is intended for physicians.
