Risks of Colorectal Cancer Screening
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Screening tests have risks.
Decisions about screening tests can be difficult. Not all screening tests are helpful and most have risks. Before having any screening test, you may
want to discuss the test with your doctor. It is important to know the risks of
the test and whether it has been proven to reduce the risk of dying from cancer.
The risks of colorectal cancer screening tests include the following:
Damage to the colon can occur.
Infection or tears in the lining of the colon can result from sigmoidoscopy, colonoscopy, or the removal of polyps found by screening.
False-negative test results can occur.
Screening test results may appear to be normal even though colorectal cancer is present. A person who receives a false-negative test result (one that
shows there is no cancer when there really is) may delay seeking medical
care even if there are symptoms.
False-positive test results can occur.
Screening test results may appear to be abnormal even though no
cancer is present. A false-positive test result (one that shows there is cancer when there really isn't) can cause anxiety and is usually followed by more tests (such as biopsy), which also have risks.
Your doctor can advise you about your risk for colorectal cancer and your need for screening tests.
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