Genes and Family History
In the U.S., 90-95% of people diagnosed with breast cancer are the first in their family.
Breast cancer may also be caused by inherited gene mutations. Hereditary breast cancers account for approximately just 5% to 10% of all breast cancers. These gene mutations are called BRCA1 and BRCA2.
Having a gene mutation doesn’t mean that you will get breast cancer, but it does mean that you are 3 to 7 times more likely. Although your chances are higher that you will pass the gene mutation to descendants, not every child will get the gene.
If you want to learn more about breast cancer and genes, read the fact sheet by the U.S. National Cancer Institute.
