Study raises questions about colonoscopies for cancer screening. What doctors want you to know

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Study raises questions about colonoscopies for cancer screening. What doctors want you to know
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A new study suggests colonoscopies may be less helpful than many had hoped. But some health experts warn against misinterpreting the study's findings.

In a video for colon cancer awareness organization Lead from Behind, 'Welcome to Wrexham' co-stars Ryan Reynolds and Rob McElhenney got colonoscopies.A New England Journal of Medicine study suggests colonoscopies aren't as helpful as many had hoped.The Preventive Services Task Force recommends all adults 45 to 75 be screened for colorectal cancer.

In the study, more than 84,000 people ages 55 to 64 from Norway, Poland and Sweden were either"invited" to receive a colonoscopy or were given"usual care," which in those countries involves no colon cancer screening at all. They were then followed for 10 years to see who developed colon cancer. The study says more about the propensity to get screened than it does about the procedure itself, experts say, as well over half of the"invited" group didn't accept the invitation to get one.

"Stool tests are good at detecting cancer," Mendelsohn said, but they don't address early precancerous growths and a positive test requires a follow-up colonoscopy. A colonoscopy is an exam to detect changes in the colon and rectum, and is one of the few options to screen for colorectal cancer, according to the Mayo Clinic.

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