This case demonstrates the left therapeutic mastectomy and the right prophylactic mastectomy with bilateral implant reconstruction in a known patient with left breast cancer that was BRCA1 mutation carrier.

Prophylactic mastectomy reduces the risk of breast cancer by at least 95% in women who have a disease-causing mutation in the BRCA1 or BRCA2 genes and by up to 90% in women who have a strong family history of breast cancer.