Toxic megacolon in ulcerative colitis and Crohn's colitis.
D003093:Colitis, Ulcerative / Q000150:complications* / Q000209:etiology*; D003424:Crohn Disease / Q000150:complications*; D006801:Humans; D007422:Intestines / Q000601:surgery; D008532:Megacolon, Toxic / Q000209:etiology* / Q000473:pathology / Q000628:therapy