Milestones in life are sometimes measured by age. You turn 18, you can vote. Turn 21 and you can drink. Reach 40 and you'll likely need reading glasses. When you're 50 your doctor will advise that you get a colonoscopy. That's what I was doing on Tuesday.
A colonoscopy (we're gonna get graphic here) is a routine visual examination of the lining of the colon and rectum using a long, flexible fiber optic tool. It's the most effective way of diagnosing any problems that may not appear on x-rays or other tests. If they're found during the examination the doctor can also remove any polyps that could develop into cancer.