Imaging tests are also used to screen for and detect colorectal cancer. These tests use technologies that visualize your body organs and present them like a picture. Imaging tests are also used to determine how far the cancer has spread or how well it is responding, or has responded, to treatment. While some tests still use X-rays, newer technologies use radioactivity (in very tiny doses), ultrasound, or magnetic fields to obtain the pictures.
Lynch syndrome is a genetic condition that makes people more likely to develop certain cancers. People who have it also have about a 50% to 80% chance of getting colorectal cancer by age 70. They’re also at risk for cancers of the uterus, ovaries, and stomach. And they tend to get cancer at younger ages than other people, often in their 30s and 40s.
Lynch syndrome is sometimes called hereditary non-polyposis colorectal cancer (HNPCC), Muir-Torre syndrome, and Turcot syndrome.
New technology has made it possible for a computer to take CT images of the colon and reconstruct a three-dimensional model of your colon. The inside of this model can be inspected, without causing any pain to you, to search for abnormalities. The test involves enlargement or distension of the colon with air. Early results show promise for screening the colon and detecting small polyps or asymptomatic colorectal cancers.
The main disadvantage of virtual colonoscopy is that any abnormalities have to be evaluated and treated by real-time colonoscopy. However, it is likely to have a place in screening for colorectal cancer.