Читать книгу Fundamentals of Cancer Detection, Treatment, and Prevention - Surya K. De - Страница 35

Colonoscopy, sigmoidoscopy, and high‐sensitivity fecal occult blood tests (FOBTs) have all been proven to decrease deaths from colorectal cancer. Colonoscopy and sigmoidoscopy also help prevent colorectal cancer because they detect abnormal colonic growths (polyps), which can be removed at that time before they develop into cancer. In addition, there are screenings for colon cancer in low‐risk patients using a stool sample, offering an alternative to the risks associated with, and the preparation for, a colonoscopy.

Virtual colonoscopy, also called CT colonography or computed tomography, is an imaging procedure in which a radiologist uses X‐rays and a computer to create images of the rectum and colon from outside the body. Ulcers, polyps, and cancer can be detected using this test.