Learn about colon cancer, a type of cancer that starts in the colon or rectum, and its symptoms, stages, causes, risk factors, diagnosis, treatment, and outlook. Find and learn about colon cancer, a type of cancer that begins in the large intestine of the colon. Find out how to prevent, diagnose and treat it, and what factors increase it. Learn how colon cancer is diagnosed and treated at Mayo Clinic, a leading medical center for colon cancer care. Learn about colonoscopy, blood tests, surgery, overview. Colorectal cancer is a type of cancer that affects the colon, large intestine, or rectum. It is one of the most common types of cancer worldwide. Options include surgery, chemotherapy, ablation, and targeted therapy. Palliative care may also be considered. In the United States, the 1-year relative survival rate for colon cancer is. Colon cancer is a type of cancer that begins in the cells that line the large intestine, the colon; some researchers include the rectum and prefer the term colorectal cancer. There are cases of colon cancer every year in the US. Colon cancer is the third type of cancer. cause of death from cancer in the US for both men and women. Colorectal cancer begins in the lining of the large intestine, also known as the colon, or in the rectum. Learn more about the definition, types, causes, risk factors, symptoms, diagnosis. Colorectal cancer is cancer that develops in the tissues of the colon or rectum. The colon and rectum are part of your digestive system: the colon is the first and longest part of the large intestine. Absorbs water and some nutrients from food. It also transforms leftover waste products into feces. In contrast, black patients have a five-year survival rate. 7 less than white patients. Another factor is the higher rate of colon cancer in black patients, who are more likely to be diagnosed after the tumor has spread and metastasized compared to white patients.