Colon cancer, also called rectal cancer, or colorectal cancer, is a grinding growth of cells from the colon or rectum. It occurs due to uncontrolled growth of colon cells, which can invade/spread to other parts of the body. Although not uncommon, the cancer cannot be detected for a long time, but the discovery of certain warning signs allows patients to receive medical care at an early stage. Saurabh Sethi, a Harvard -trained gastroenterologist, reveals these 8 warning signs you have to watch out for …