It is the colon or rectum in the large intestine where Colorectal cancer begins. It usually develops as small, noncancerous (benign) clumps of cells which are called polyps which form on the inside of the colon or rectum. Some of the polyps might turn into cancer after a time. Polyps might be small and produce few if any symptoms. It is recommended to have regular screening tests to help prevent colorectal cancer by detecting and removing polyps before they can turn into cancer.
Factors that may increase risk of colon cancer include:
A personal history of colorectal cancer or polyps
Inflammatory intestinal conditions.
Inherited syndromes that increase colon cancer risk like familial adenomatous polyposis (FAP) and hereditary nonpolyposis colorectal cancer (HNPCC).
Family history of colon cancer
Low-fiber, high-fat diet
A sedentary lifestyle.
Radiation therapy for cancer. Radiation therapy directed at the abdomen to treat previous cancers increases the risk of colon cancer.
Colon cancer treatments depends the location of cancer, its stage and other health concerns. Treatment for colon cancer usually involves surgery to remove the cancer. Other treatments, such as radiation therapy and chemotherapy, immunotherapy and target therapy also be recommended.