Cancer that starts in the colon is called colon cancer, and that which starts in the rectum is called rectal cancer. Usually, cancer beginning from any of these two is known as colorectal cancer. Carcinoma is the major type of colorectal cancer while lymphoma carcinoid, melanoma, fibrosarcoma, and other types are less common. Studies show that people who are above 50, obese, intake low-fiber diet, experience polyps and...