A new type of preventative medicine

If you were a woman and you were told there was a 100% chance that you would develop breast cancer if you didn't undergo a full mastectomy, would you? How about if there was a 90% chance? Or a 25% chance.

What if there was a 90% chance you would get kidney disease if you didn't get a kidney transplant? Or a 90% chance that you would be blind if you didn't get an eye transplant? Or just a 90% chance that you would need glasses?

How far does it go?

In this article, the author debates having both breasts and ovaries removed after getting the results of some genetic testing.