If a simple test could tell you, at age 18, whether you were at high risk of developing breast cancer at some point during your lifetime, would you take the test?
If you took the test, and the results said yes, you’re at increased risk—what would you do? Change your lifestyle? Your eating habits? Have a double mastectomy?
How would you feel? Terrified? Empowered?
The New England Journal of Medicine reported last week that scientists are probably “just a few years away” from a simple,...


