Colonoscopy is a test that allows your doctor to look at the interior lining of your large intestine (rectum and colon). A colonoscopy is done using a thin, flexible viewing instrument called a colonoscope.
Is this topic for you? This topic provides information about the initial testing, diagnosis, and treatment of colorectal cancer. If you are looking for information on colorectal cancer that has come back or has spread to other parts of the body, see the t
Your doctor may recommend earlier or more frequent testing if you: Already have been diagnosed with colorectal cancer. Have a first-degree relative (parent,brother,sister,or child) with an adenomatous polyp or colorectal cancer. Are an African American. Have had adenomatous polyps removed from your colon. This type of polyp is more likely to turn into cancer,but the risk is still very ...
Unless colon polyps are large and cause bleeding or pain, the only way to know if you have polyps is to have one or more tests that explore the inside surface of your colon. Several tests can be used to detect colon polyps.
Colon polyps usually do not cause symptoms unless they are larger than or they are cancerous. The most common symptom is rectal bleeding. Sometimes the bleeding may not be obvious (occult) and may only be discovered after doing a screening test.