Early stages of colorectal cancer usually present no symptoms. It is highly treatable if detected early. Colonoscopy is the only test to prevent colorectal cancer, with its unique ability to remove polyps before they turn into cancer. It is the only screening test recommended at 10-year intervals, because it’s by far the best test at finding precancerous polyps. Screening is now recommended to begin at 45 years of age for patients at average risk.


The American Society for Gastrointestinal Endoscopy (ASGE) has collated critical information here to enable you to make informed choices about your health care. Consult your physician for more information.


View ASGE leaders promoting the importance of colorectal cancer screening in this Balancing Act segment on Lifetime TV.

What is a Colonoscopy?

Colonoscopy is the gold standard in colorectal cancer screening. It’s the best test for finding precancerous polyps, the only test that allows for removal of precancerous polyps during the exam and the only test recommended at 10 year intervals. Learn more about colonoscopy below.

Why Screen For Colorectal Cancer?

Colorectal cancer (also referred to as colon cancer) is a cancer that develops in the colon or the rectum. Colorectal cancer usually develops slowly over a period of many years and can be prevented if caught early. Regular screening can help prevent CRC through diagnosis at an early, curable stage or through removal of precancerous polyps.

Listen to this radio interview by ASGE member, Dr Jay Bosco, on The Drew Mariani Show on Relevant Radio

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TV interviews by Dr Douglas Rex

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Who Should Screen?

Latest recommendations encourage average-risk individuals to begin screening at age 45 years. High-risk individuals, such as those with family history, symptoms and certain lifestyles, should screen earlier. Read on to find out more.

New USPSTF guidelines lower age to begin colorectal cancer screening from 50 to 45

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Advocates for Earlier Colorectal Cancer Screenings Win Important Ally

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Value of Colonoscopy - Patient Testimonial: Dr. Cohen and Ricardo Newball on early onset of symptoms

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Value of Colonoscopy - Patient Testimonial: Dr Ganjhu and Melinda Chlodney

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What Types Of Screening?

Colorectal cancer screening saves lives in two important ways:

  • By finding and removing precancerous polyps before they become cancerous
  • By detecting the cancer early when it is most treatable

There are many options for screening but not all are the same. Depending on your history and personal situation, certain tests like colonoscopy are the most effective. Learn about the different test options below.

How to Get A Colonoscopy?

ASGE’s members are qualified gastroenterologists who have highly specialized training in endoscopic procedures of the digestive tract. Use the Find a Doctor tool to locate an ASGE member gastroenterologist in your area.

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