In patients with high risk through genetic testing, it becomes a personal choice to have a prophylactic mastectomy vs. surveillance. This is a discussion with an oncologist. Best of luck.
This is a discussion you need to have with your oncologist. Because you have a genetic predisposition and such a strong family history, your chances of getting cancer is higher than the rest of the population. Make sure you understand what the oncologist is saying and don't be afraid to ask many questions. There are also many reconstructive options available and you can speak with a PS about them.