“Colorectal cancer is a cancer that starts in the colon or the rectum. These cancers can also be named colon cancer or rectal cancer, depending on where they start. Colon cancer and rectal cancer are often grouped together because they have many features in common.  Most colorectal cancers start as a growth on the inner lining of the colon or rectum. These growths are called polyps; where some of them can change into cancer.”

American Cancer Society