I was going thought this site about http://www.caring.com/articles/colorectal-cancer-risk and i found this
If any of a person's immediate family members (parents, siblings, or children) had colorectal cancer, he's somewhat more likely to develop this disease himself. The likelihood goes up if more than one family member had colorectal cancer or if any of his relatives developed the cancer before the age of 50.
My dad has colon cancer and my mom's father also , so does it have high chances that i will also get.
My dad is going through a lot and It is quite worrying.
Angela Tanner