People with classic IBS do not have any more chance of colon cancer before 50 or so than someone without it. For classic IBS issues, with a family history of such, there is no reason to do a colonoscopy. For those without IBS in the family, who are older, who don't have perfect IBS symptoms, who have a family history of young cancer or other problems, or whose digestive troubles start suddenly, a colonoscopy is a must.
-------------------- IBS-A for 20 years with terrible bloating and gas. On the diet since April 2004. Remember this from Heather's information pages:
"You absolutely must eat insoluble fiber foods, and as much as safely possible, but within the IBS dietary guidelines. Treat insoluble fiber foods with suitable caution, and you'll be able to enjoy a wide variety of them, in very healthy quantities, without problem." Please eat IF foods!