The exact reason why colon cancer develops in some persons and not in others is not clear. The incidence of colon cancer is quite varied among different countries and within different ethnic groups inside the same country. Industrialized countries like United States, Canada, UK, Western Europe, Australia and Japan have a much higher incidence of colorectal cancer compared to the less industrialized parts of the world like Asia, Africa, and South America. Colorectal cancer represent over 9 percent of all cancers in men and about 10 percent of all cancers in women world-wide. In industrialized countries the incidence of colorectal cancer can be as high as 12 to 14 of all cancers, and in non-industrialized countries much lower rates of about 7 to 8 percent of all cancers diagnosed may be colorectal cancer.
» Read more: Who Is More Prone To Develop Colorectal Cancer?