Colorectal Cancer Screening: New Options

Learn about the latest tests science is studying to screen for colon cancer.

New tests for colorectal cancer screening are under study. For example, virtual colonoscopy (also called computed tomographic colonography) is a procedure that uses special x-ray equipment to produce pictures of the colon. A computer then assembles these pictures into detailed images that can show polyps and other abnormalities. Because it is less invasive and does not require sedation, virtual colonoscopy may cause less discomfort and take less time than conventional colonoscopy. However, as with conventional colonoscopy and DCBE, thorough preparation of the colon is necessary before the test.

Unlike conventional colonoscopy, it is not possible to remove polyps or perform a biopsy during virtual colonoscopy. An additional procedure, such as conventional colonoscopy, is needed if the virtual procedure finds a potential problem. Clinical trials (research studies with people) are under way to compare the advantages and disadvantages of virtual colonoscopy with those of other colorectal cancer screening tests.

Genetic testing of stool samples is also under study as a possible way to screen for colorectal cancer. The lining of the colon is constantly shedding cells into the stool. Testing stool samples for genetic alterations that occur in colorectal cancer cells may help doctors find evidence of cancer or precancerous polyps. Research conducted thus far has shown that this test can detect colorectal cancer in people already diagnosed with this disease by other means. However, more studies are needed to determine whether the test can detect colorectal cancer or precancerous polyps in people who do not have symptoms.

Additional information about clinical trials to test new methods for colorectal cancer screening is available from the NCI's website at http://www.cancer.gov/clinicaltrials/ or by calling the CIS at 1-800-4-CANCER (1-800-422-6237).

From The National Cancer Institute

 

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• Colon Cancer: Are You at Risk?
• A brief guide to the risk factors associated with colorectal cancer.
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• Colon Cancer Screening: Know Your Options
• Learn about the tests that detect colorectal cancer and determine which is right for you.
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• After Your Colon Cancer Screening
• What happens if your tests reveal an abnormality?
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• Colorectal Screening Tests: Pros and Cons
• Our colon cancer screening tests chart makes it easier for you to compare the most frequently used exams.
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• 31 Simple Ways to Prevent Cancer
• Small changes to inoculate yourself against cancer.
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• Online Cancer Resources
• A guide to up-to-date cancer research and information
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• Cutting-Edge Cancer Therapies
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• Should I Take Part In a Clinical Trial?
• Information to help you decide whether you should participate in a clinical trial.
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• Complementary and Alternative Therapies in Cancer Treatment
• Complementary and alternative treatments for cancer are becoming more widely used. Here is some basic information to help you evaluate this option.
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