This video (30 seconds...short!) makes a sharp point about getting screened for colorectal cancer with a colonoscopy.  I was two years shy of the "screening date" for colon cancer, typically 50 years old.

If you have a family history of cancer of any type (or several types), insist on getting screened at 45...even if you have to pay for it yourself.  If you don't have a family history of cancer, get screened no later than age 50.  Several folks I know have been screened since I was diagnosed.  Two had polyps that could have turned into cancer.

As Terence Howard points out, this cancer is preventable with screenings.  Believe me, you don't want to wait for tumors to grow and spread.  Chemo isn't as bad as it used to be...treatments are better at extending life.  But you don't want to go there.

So get your butt screened!