Colorectal Cancer Facts
* Colorectal Cancer (CRC) is the second leading cancer killer in the United States. In 2003, the American Cancer Society
estimated there were 800 new colon cancer cases in New Mexico with 300 possible linked deaths.
* CRC usually starts from polyps which can become cancerous. Screening tests help find polyps before turning into cancer.
When polyps are found early, they can be removed before becoming cancerous.
* 93% of CRC cases occur in people aged 50 and older. Risk increases with age.
What is Virtual Colonography?
* Virtual colonography is the use of computerized tomography (CT) to generate a 3D image of the colon.
* To begin the exam, the colon is first cleansed, or prepped, prior to the exam. A small, thin tube is then inserted into the
rectum in order to fill the colon with carbon dioxide (CO2). CT is performed to obtain images of the colon. Some discomfort and a bloated feeling may occur, but there is no need for sedation, as with traditional colonoscopy.
Advantages of Virtual Colonography
* Can replace traditional colonoscopy as a screening tool.
* Can be performed for patients who cannot tolerate colonoscopy or who have had an incomplete colonoscopy.
* A smaller and thinner catheter is used.
* No need for sedation - able to return to normal activities immediately following exam.
* The tissues surrounding the colon can also be evaluated.
What is the Difference Between Virtual Colonography and Traditional Colonoscopy?
Virtual colonography uses 3D CT images to allow the radiologist to use "fly-through technology" to view the inside of the colon with the ability to stop and view any suspicious areas. It utilizes small and thin catheter and no sedation is required. Colonoscopy uses a longer and thicker tube so the physician can directly view and biopsy abnormalities (if needed) in the colon. Sedation is always required to minimize the discomfort.
Screening for Colorectal Cancer
* Should begin soon at 50 years of age every 10 years.
* Testing should begin earlier and more frequently if there is a family history of polyps, cancer or inflammatory bowel disease.
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