New blood test can spot more than 50 types of cancer – many hard to detect early; "game-changer"

The sooner most cancers are discovered, the better the odds they can be successfully treated.

Mayo Clinic participated in research on a test that can detect more than 50 cancers. Doctors call it a game-changer, CBS Minnesota reports.

"My dad, he was a healthy guy. He didn't have any known risk factors for cancer," Dr. Julia Feygin said.