[Massive hemorrhage of the lower gastrointestinal tract].
D000293:Adolescent; D000328:Adult; D000368:Aged; D003108:Colonic Diseases / Q000175:diagnosis / Q000601:surgery*; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged