The FDA says you can now test yourself for cancer at home without a doctor. Here's why you shouldn't.

The FDA says you can now test yourself for cancer at home without a doctor. Here's why you shouldn't.

Cancer-screening is a double-edged sword. Knowledge can save lives, but it can also trigger fear and lead to unnecessary harm.

by David Ropeik / Mar.23.2018 / 2:46 PM ET