Colon Test Alternative to a Colonoscopy
- One of the most popular alternatives to colonoscopy is the stool DNA test. Particles of tissue that have been shed from the colon and small intestine are often found in fecal matter. In this test, a stool sample is taken and any of these particles found are analyzed for traces of polyps and/or cancer. While the results of this test have only been found to be 20 to 40 percent accurate, new stool-analysis methods are being developed that could improve the reliability of this test to as high as 90 percent.
- Though more information is needed to determine its accuracy, a virtual colonoscopy is another popular substitute for the more invasive colon exam. In a virtual colonoscopy, hundreds of X-rays are taken at once to build an animated 3-D version of the colon that doctors can observe and navigate through on a screen to locate polyps and other signs of colon cancer.
- A barium enema involves injecting water with barium sulfate particles suspended in it through the anus, filling up the entire colon. This liquid makes the inside of the colon much more visible in an X-ray, which is performed after the enema is completed. While this procedure is a good way to check for larger abnormalities, it can sometimes be difficult for doctors to identify small polyps or cancers.
- While each of these alternative methods can provide a less-invasive method of examining the colon, colonoscopy is still considered the most accurate exam for identifying polyps and cancer. The American Cancer Society recommends a colonoscopy at age 50 and every 10 years thereafter. If the thought of a colonoscopy makes you nervous, speak with your doctor about possible alternatives. But be prepared for him or her to still encourage you to have a colonoscopy.
