[Postgastrectomy hemorrhage].
D000367:Age Factors; D000368:Aged; D005743:Gastrectomy; D005763:Gastroenterostomy; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications