Screening tests can find or prevent many cases of colon and rectal cancer. They look for a certain disease or condition before any symptoms appear. Experts recommend routine colon cancer testing for everyone age 50 and older who has a normal risk for colon cancer. Your doctor may recommend getting tested more often or at a younger age if you have a higher risk. Talk to your doctor about when you should be tested.
Sigmoidoscopy. A doctor uses a lighted scope to see the lower portion of the intestine. This is where most colon cancers grow. Doctors can also remove polyps during this test.
Colonoscopy. A doctor puts a long, flexible tube into your rectum and colon. The tube is usually linked to a video monitor similar to a TV screen. With this test, the doctor can see the entire large intestine.
Computed tomographic colonography (CTC), also called a virtual colonoscopy. A computer and X-rays make a detailed picture of the colon to help the doctor look for polyps.
This information is produced and provided by the National
Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National
Institute via the Internet web site at http://
.gov or call 1-800-4-CANCER.
WebMD Medical Reference from Healthwise
November 14, 2014
This information is not intended to replace the advice of a doctor.
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