Did your grandparents have colon cancer? Have any of your relatives ever had polyps?
Knowing the answers to questions like these could tell you if you are at an increased risk for colon cancer. Colon cancer is the second leading cause of cancer related death in the U.S.
Take the time to learn your health history by filling out a family health tree (pdf). You may need to tell your doctor to "Screen my colon!" (TM) earlier than you thought.
Source: CCA: Screen My Colon