Duodenal erosions/ulcer

Gastric erosions/ulcer

Stress gastritis

Mallory-Weiss tear

Esophagitis/esophageal ulcer

Esophageal/gastric varices

Portal hypertensive gastropathy

Neoplasm

Gastric cancer

Esophageal cancer

Stromal tumor

Vascular anomalies

Angiodysplasia/ectasia

Dieulafoy lesion

Gastric antral vascular ectasia (GAVE)

Hereditary hemorrhagic telangiectasia (Osler-Weber-Rendu)

Arteriovenous malformation

Aortoduodenal erosion or fistula

Hemobilia

Hemosuccus pancreaticus

Non-GI source (epistaxis)

Factitious bleeding