Abstract

New Screening Techniques for Colon Cancer"Virtual colonoscopy"CT colonography, often referred to as "virtual colonoscopy," provides 3-dimensional images of the colon via CT scanning. While this procedure does not utilize traditional scopes, the standard colonic purge and bowel inflation are still required. This procedure takes less time than a normal colonoscopy and there is no risk of perforation. As it is performed without sedation, the patient can return to his or her normal activities immediately after the procedure. Fecal DNA AnalysisThe fecal DNA analysis analyzes stool for abnormal cells from polyps or cancers, and checks for genetic mutations as well. Overall, it has a greater sensitivity for detecting cancer than the fecal occult blood test, and therefore, may be a useful screening tool for patients with an average colorectal cancer risk. For more information, please see "Colorectal Cancer Screening: Today and Tomorrow" by Drs. Kenneth E. Hung and Daniel C. Chung, in the March 2006 issue of the Southern Medical Journal.