Bowel cancer may be diagnosed by obtaining a sample of the colon during a sigmoidoscopy or colonoscopy. This is then followed by medical imaging to determine if the disease has spread. Screening is effective for preventing and decreasing deaths from colorectal cancer. Screening is recommended starting from the age of 50 to 75. During colonoscopy, small polyps may be removed if found. If a large polyp or tumor is found, a biopsy may be performed to check if it is cancerous. Aspirin and other non-steroidal anti-inflammatory drugs decrease the risk. Their general use is not recommended for this purpose, however, due to side effects.
We researched this topic for you and found the following best online resources. They are categorized into basic, advanced, and research level based on the extent of information you need. You will be taken to the respective websites by pressing on the links below.
http://www.aafp.org/afp/2015/0115/p93.html colorectal cancer screening and surveillance by matthew w. Short, ltc, mc, usa, madigan army medical center, tacoma, washington et al., am fam physician. 2015 jan 15;91(2):93-100.
https://www.hindawi.com/journals/grp/2012/184343/ rani kanthan, jenna-lynn senger, and selliah chandra kanthan, “fecal molecular markers for colorectal cancer screening,” gastroenterology research and practice, vol. 2012, article id 184343, 15 pages, 2012. Doi:10.1155/2012/184343
Almadi ma, mosli mh, bohlega ms, al essa ma, aldohan ms, alabdallatif ta, alsagri ty, algahtani fa, mandil a. Effect of public knowledge, attitudes, and behavior on willingness to undergo colorectal cancer screening using the health belief model. Saudi j gastroenterol [serial online] 2015 [cited 2016 sep 20];21:71-7. Available from: http://www.saudijgastro.com/text.asp?2015/21/2/71/153814