title: Retained gastric antrum.
mesh_terms: D005743:Gastrectomy; D005763:Gastroenterostomy; D006396:Hematemesis / Q000209:etiology; D006801:Humans; D008297:Male; D008551:Melena / Q000209:etiology; D008875:Middle Aged; D010438:Peptic Ulcer Hemorrhage / Q000601:surgery*; D011183:Postoperative Complications; D013276:Stomach Ulcer / Q000150:complications