You can have a blood test to look for the changed genes that cause colon cancer, although the test for HNPCC is not as widely available as the test for FAP. A positive result means that you may have one of the changed genes that causes FAP or HNPCC. It also means that your chances of getting colon cancer are very high. A negative result means that no such gene could be found in your blood sample.
The decision to take the test for genetic colon cancer is personal. You may have emotional, financial, and family reasons for taking or not taking the test. You might choose to be tested because:You have received genetic counseling, understand the risks and benefits of testing, and feel that the benefits outweigh the risks. You have a personal history of more than 20 colon polyps, especially at a
Information from genetic testing can have a profound impact on your life. Genetic counselors are trained to explain the test and its results,but you make the decision about whether to have the test. A genetic counselor can help you make well-informed decisions. Ask to have genetic counseling before making a decision about testing. Genetic counseling can help you and your family: Understand ...
Colon cancer genetic testing can tell you whether you carry a rare changed, or mutated, gene that can cause colon cancer. Although most people who get colon cancer do not have one of these mutated genes, having them greatly increases your chance of getting colon cancer. Colon cancer develops in the large intestine when cells change and grow out of control. Colon cancer is also called colorectal ..
Call your doctor if you have any symptoms of colorectal cancer, such as a change in bowel habits, bleeding from your rectum, including bright red or dark blood in your stools, or constant or frequent diarrhea or constipation.