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Pouchoscopy is a minimally invasive endoscopic procedure to examine an ileo-anal pouch, a replacement for the colon / rectum which is surgically created from the small intestine (ileum) as a cure for ulcerative colitis and as a treatment for other inflammatory bowel diseases such as Crohn's disease, a preventative measure in certain genetic illnesses such as FAP or HNPCC or as a procedure in the treatment of colon cancer. Typically, a fiber optic camera on a flexible tube is passed through the anus. Although it may determine the integrity of the J-pouch (hence the name pouchoscopy), it is much more common to perform a pouchogram to determine the pouch's integrity (a necessary step in preparing for reversal of the temporary ileostomy, or takedown surgery). A pouchoscopy is normally part of a routine follow up and is used to confirm diagnosis of pouchitis and cuffitis.