ROLES OF COLONOSCOPY IN EARLY DETECTION OF COLORECTAL CANCER AND REVIEWING RISK FACTORS

Colorectal cancer (CRC) is a common and lethal disease. The danger of obtaining CRC is affected by both ecological and genetic factors, which are discussed in this review. The epidemiology of CRC and Colorectal screening, pros and effect of Colonoscopy are emphasized as well. We conducted a narrative review study that performed through Comprehensive literature search was performed in MEDLINE/PubMed (using combinations of the following search terms: " colorectal cancer, Colonoscopy, diagnosis, screening, risk factors" " our search was ended on June, 2019. Numerous colorectal cancers can be prevented with regular testing. Screening can locate precancerous polyps- abnormal growths in the colon or rectum- to make sure that they can be eliminated before they turn into cancer. Screening is critical since when found early, colorectal cancer is highly treatable. Early stages of colorectal cancer generally existing no symptoms, which tend to appear as the cancer progresses. The American Cancer Society suggests that colorectal cancer testing ought to start at age 45. A colonoscopy is the best screening test available for colorectal cancer. It is the only testing test that also can prevent numerous colorectal cance