Myriad Genetics Blog Myriad Genetics Blog > Vlog: Genetic Mutations and the Benefits of Testing Vlog: Genetic Mutations and the Benefits of Testing April 22, 2016 Corporate VP of Medical Services Susan Manley explains what genetic mutations are and how testing can definitively determine whether or not a cancer is hereditary in nature or is sporadically occurring. The results of genetic tests can empower people to take the necessary actions to reduce their risk for cancer.