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Causes of acute upper gastrointestinal bleeding
| Common | Gastric ulcer |
| Duodenal ulcer | |
| Esophageal varices | |
| Malory-Weiss tear | |
| Less common | Gastric erosive/gastropathy |
| Esophagitis | |
| Cameron lesions | |
| Dieulatory lesion | |
| Telangiectasias | |
| Portal hypertensive gastropathy | |
| Gastric antral vascular ectasia (watermelon stomach) | |
| Gastric varices | |
| Neoplasms | |
| Rare | Esophageal ulcer |
| Erosive duodenitis | |
| Aortoenteric fistula | |
| Hemobilia | |
| Pancreatic disease | |
| Crohn's disease |
