It is a myth that colon cancer is a "man's disease." Colon cancer does not have a gender bias -- men have a lifetime risk of 5.7%, and women a lifetime risk of 5.1%.
Source:
U.S. Preventive Services Task Force. Screening for Colorectal Cancer: U.S. Preventive Services Task Force Recommendation Statement. Agency for Healthcare Research and Quality October 2008. 26 Jan 2009.

