g obstructionIschemic colon (lack of blood supply to the colon) Toxic megacolon (massive dilatation of the colon) Fistulae between the colon and other organs such as the bladder or vaginaRemoval of the colon may be carried out as a scheduled procedure or as an emergency in life saving situations such as severe bleeding or perforation of colonThe extent of removal of the colon varies depending on t