The exact cause of colorectal cancer is not known. Most cases begin as small growths, or polyps, inside the colon or rectum.
Reference Colon polyps Opens New Window are very common. If they are found early, usually through routine screening tests, they can be removed before they turn into cancer.
|By:||Reference Healthwise Staff||Last Revised: Reference October 22, 2012|
|Medical Review:||Reference E. Gregory Thompson, MD - Internal Medicine
Reference Kenneth Bark, MD - Surgery, Colon and Rectal