There are many preventive tests out there, but some are more crucial than others because they can make a dramatic impact. Take colonoscopy. One in 20 people will develop colon cancer at some point in their lives and the early detection of polyps is crucial to preventing and controlling it. Colonoscopy is recommended for everyone over age 50, but for people with a family history of colon cancer, it's recommended at 40. Colonoscopy is done even earlier if a family member suffered colon cancer at an early age.
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