On this episode of Prognosis, reporter Michelle Fay Cortez probes one of the more disturbing unintended consequences of the genetic testing revolution. DNA tests have become so prevalent that more and more people are discovering they have rare and potentially dangerous or even lethal genetic mutations. But how accurate are those findings? And what should people and their doctors do about them? Michelle tells the story of one family faced with the decision whether to proceed with life-altering surgeries to avoid facing a cancer diagnoses one day in the future.