I agree with some of what she said but not all. I have had 1 colonoscopy at 55 and undecided if I will have another before 70. After 70 your lining thins and it is easier to perforate your colon which usually results in death from sepsis. My sibs figure it is worth the risk since they have polyps every time they get one (every 5 years). I didn't have any. mammograms however are a no brainer for me. Most people that get breast cancer have no history.