Colorectal cancer (CRC) is an important social and medical problem. Complete recovery can be achieved only if the disease is diagnosed in the early stages, most common by screening methods. Studies have shown that screening methods reduce the incidence and mortality of colorectal cancer. The methods for colorectal screening can be divided into tests that allow the detection of cancer (fecal occult blood test and fecal DNA test) and morphological tests that allow diagnosis of cancer or adenomatous polyps (flexible sigmoidoscopy, colonoscopy, double contrast barium enema, CT colography ). In people with average risk of disease, screening begins at 50 years and performed on one of the following: fecal occult blood test (every year), flexible sigmoidoscopy (every 5 years), colonoscopy (every 10 years), double contrast barium enema (every 5 years) or CT colography (every 5 years). Colonoscopy is the preferred method, and is used as a confirmatory method, if the any other methods was positive.