A colostomy is an opening in the wall of the abdomen made during surgery. The end of the large intestine is entered through this opening to form a stoma. Where the stoma will be formed on the abdomen depends on which part of the colon is used to make it. Colostomies can be both temporary and permanent. Temporary colostomies are reversed after sometime when the patient is in a condition to undergo another procedure. Permanent colostomies are indicated where abdominoperineal resection is performed and the cancer is unresectable or the sphincter is damaged beyond repair. Although it is a life-saving procedure, both its construction and reversal have significant complications and mortality.