By; Jordan Giacometti
In most cases, it's not clear what causes colon cancer. What we do know is colon cancer occurs when healthy cells in the colon become altered. Healthy cells grow and divide in an orderly way to keep your body functioning normally. But when a cell is damaged and becomes cancerous, cells will continue to divide even when new cells aren't needed. These cancer cells can invade and destroy normal tissue nearby. Cancerous cells can travel to other parts of the body. Colon cancer most often begins as clumps of precancerous cells on the inside lining of the colon.
Body System and Description
Colon cancer is cancer of the large intestine, the lower part of your digestive system. Most cases of colon cancer begin as small, noncancerous clumps of cells called adenomatous polyps. Over time some of these polyps become colon cancers. Symptoms for colon cancer is a change in your bowel habits such as diarrhea or constipation of a change in consistency. Rectal bleeding in blood in your stool, persistent abdominal discomfort like cramps, gas or pain. You could also experience a feeling that your bowel doesn't empty completely, weakness or fatigue, or unexplained weight loss.