Pt. I. Problems you should know about: it is unlikely that you will benefit
You may have a "cancer scare" and face an endless cycle of testing
You may receive unnecessary treatment
You may find a cancer you would rather not know about
Your pathologist may say it's cancer, while others say it's not
Your doctor may get distracted from other issues that are more important to you
Pt. II. Becoming a better-educated consumer: understand the culture of medicine (and why we are pushed to test)
Understand the statistics of cancer (and why five-year survival is the world's most misleading number
Understand the limits to research; even genetic research (and why it is hard to be sure there really are benefits to screening
Develop a strategy that works for you.