<unk>  is an acute form of colonic distension. It is characterized by a very dilated colon<unk> , accompanied by abdominal distension (bloating), and sometimes fever, abdominal pain, or shock.<unk>  is usually a complication of inflammatory bowel disease, such as ulcerative colitis and, more rarely, Crohn's disease, and of some infections of the colon, including Clostridium difficile infections, which have led to pseudomembranous colitis. Other forms of<unk>  exist and can be congenital (present since birth, such as Hirschsprung's disease). It can also be caused by Entamoeba histolytica and Shigella. It may also be caused by the use of loperamide.
Toxic megacolon
Enterotoxemia
Proteus syndrome
Distal intestinal obstruction syndrome
Floating–Harbor syndrome
Megacolon
Clostridial necrotizing enteritis
Neutropenic enterocolitis