In the germline, you can inherit a gene that would increase your risk for cancer. The Braco1 mutation is an inherited gene. Even with that mutation have about a 50 to 55% chance of developing breast cancer,. But not 100%. So that means it's a secondary risk factor.
Thomas Seyfried, PhD is a preeminent cancer expert and professor in the department of biology at Boston College. He received a PhD in 1976 in genetics and neurochemistry from the University of Illinois at Urbana-Champaign, followed by a postdoctoral degree from Yale University in the field of neurochemistry and genetics.
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