Bleeding from the upper gastrointestinal tract.
D004035:Diet Therapy; D004932:Esophageal and Gastric Varices / Q000150:complications; D006471:Gastrointestinal Hemorrhage / Q000628:therapy; D006396:Hematemesis / Q000175:diagnosis / Q000209:etiology; D006801:Humans; D008551:Melena / Q000209:etiology; D010438:Peptic Ulcer Hemorrhage; D013274:Stomach Neoplasms / Q000150:complications