Vascular malformations of the stomach and duodenum.
D000328:Adult; D000368:Aged; D004386:Duodenum / Q000098:blood supply*; D005260:Female; D005753:Gastric Mucosa / Q000098:blood supply*; D006471:Gastrointestinal Hemorrhage / Q000209:etiology; D006801:Humans; D007413:Intestinal Mucosa / Q000098:blood supply; D008297:Male; D008551:Melena / Q000209:etiology; D014699:Venules / Q000002:abnormalities