title: Letter: Massive upper gastrointestinal bleeding.
mesh_terms: D000368:Aged; D004724:Endoscopy; D005336:Fiber Optic Technology; D005743:Gastrectomy / Q000009:adverse effects; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis* / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D011183:Postoperative Complications; D011859:Radiography; D013276:Stomach Ulcer / Q000209:etiology