faces an excruciating decision: biannual mammograms and m.r.i.s, or a double mastectomy. you feel a little bit like a ticking time bomb because you know you have the gene. reporter: typically palb2 genes help repair d.n.a. damage in cells and stop tumor growth, but a mutation can result in cells that become abnormal further increasing every woman s nearly 13% average lifetime risk of getting breast cancer. for carriers of the palb2 mutation, with no family history, the risk goes up to 3 33%, and even higher with a family history to 58%. dr. elisa port is crutchfield s physician at the dubin breast center. some people who consider genetic testing just would rather not know. i would say that knowledge is power, and i tell all of my mutation carriers, the ball is in their court. reporter: dr. crutchfield had genetic testing because of her family history of cancer.
succeed? a leader, the funding to do their job, and the ability to support state and local law enforcement, which is why a.t.f. was created in the first place. o donnell: not even president trump could get his nominee confirmed. you can see more of our interview at cbsnews.com. all right, tonight, there s a new advancement in the fight against breast cancer. the cleveland clinic is launching trieldz of a vaccine aimed at preventing one of the most aggressive forms of the disease. and while that is encouraging, we re also learning about a lesser-known gene mutation that is causing alarm. here is cbs nikki battiste. go ahead and lie back. reporter: dr. mathilde crutchfield isn t used to being the patient, but recent genetic testing revealed she has a rare mutation in the palb2 gene, significantly increasing her risk for breast cancer. when it came back positive, i was very surprised. reporter: now the 48-year-old mother of three