In the table below, the figures are only rough estimates from
research studies. Lifetime risk means the chance that you will get this cancer
sometime during your life. These numbers may not apply to you, but they can
give you an idea of how high your risk may be.
How does having a BRCA gene change affect your lifetime risk?
Breast cancer risk
Ovarian cancer risk
12 out of 100 women will get
1 out of 100 women will get
BRCA gene carriers
35 to 84 out of 100 will get
15 to 40 out of 100 will get
In the table above, the range for BRCA gene carriers is very
broad. That's because different studies have had different results. More study
is needed to get a better idea of just how high the risk is for these
Pictures may help you understand these numbers better. See
the following pictures to get a better idea of how much a BRCA gene change
increases your risk for:
If you are worried that you may have a BRCA gene change, talk
to your doctor.
- Breast Cancer Risk: Should I Have a BRCA Gene Test?
How can you find out what effect your family history has on your risk?
The best way to find out is to
see your doctor. Your doctor will ask you for as much information about your
relatives as you can give (for example, what kind of cancer they had, if any;
how old they were when they were diagnosed; and, if they have died, how old
they were when they died).
People often don't have a lot of
information about all of their relatives. The more you can find out, the better
your doctor can help you figure out how strong your family history is.
Your doctor may send you to a genetic counselor, who can help you learn
how high your cancer risk is. After counseling, you may decide to have a BRCA
Finding out how high your risk is can help you make
important decisions about your health. Some women decide to take extra steps to
prevent breast and ovarian cancer, such as having checkups more often, taking
anti-cancer medicine, or having surgery to remove the breasts, the ovaries, or
- Breast Cancer: What Should I Do if I'm at High Risk?
- Ovarian Cancer: Should I Have My Ovaries Removed to Prevent Ovarian Cancer?