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Colonoscopy advances

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If you're at least 50 years old, you should have a colonoscopy.

And if you have a family history the test should be done even sooner.

A Connecticut doctor is attracting patients from hundreds of miles away for a special colonoscopy technique he performs that's catching cancer early and saving lives.

Dr. Joseph Anderson, gastroenteologist, says "for people who are at higher risk than others we use a food coloring called indigo carmine and what it does, is it helps to detect the flat lesions and lesions you may not normally see with the naked eye."

If polyps are found and removed, cancer can be prevented.

If colon cancer is not detected early and progresses to stage four, it's often deadly.

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