Your doctor may recommend earlier or more frequent testing if you: Already have been diagnosed with colorectal cancer. Have a first-degree relative (parent,brother,sister,or child) with an adenomatous polyp or colorectal cancer. Are an African American. Have had adenomatous polyps removed from your colon. This type of polyp is more likely to turn into cancer,but the risk is still very ...
Colorectal cancer in its early stages usually doesn't cause any symptoms. Symptoms occur later, when the cancer may be more difficult to treat. The most common symptoms include: Pain in the belly. Blood in your stool or very dark stools. A change in your
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.
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.