I went for one recently and they found a very large polyp, 60 cm's in dia. It was a messy thing to have cut out and I had a lot of bleeding afterwards. This thing was pre-cancerous thank god but couldve changed anytime. I had no symptoms just a routine colonoscopy, can I urge anyone on here over 50 to go for regular colonoscopies, and get any polyps removed, bowel cancer is a major killer here in Oz, in fact with all the processed foods the western diet consists off, its becoming a bit of an epidemic. I'll be having another one in 2 years.