Carrying a BRCA1 or BRCA2 gene mutation increases the risk of developing breast or ovarian cancer, as well as certain other cancers.
Having a BRCA1 or BRCA2 gene mutation, however, does not mean you will develop cancer, only that you are at increased risk to develop cancer.
At this time, no one can predict:
- your exact risk for developing cancer
- the type of cancer you may develop
- the age that a cancer develops
This section provides a general overview of the cancer risks associated with BRCA1 and BRCA2 gene mutations. If you have specific questions about your risk, your genetic counsellor can help answer them.
Understand cancer risks for women who are BRCA mutation carriers
Understand cancer risks for men who are BRCA mutation carriers
A note about risk rangesThere have been several studies done to estimate cancer risk for BRCA1 and BRCA2 mutation carriers. Risk is presented as a range, rather than a single number, because there are variations between the studies, including:
- the types of study
- the methods of analysis
- the population studied
The ranges presented here are taken from studies called “meta-analyses” that combine the results of many studies.
You should always consult a genetic counsellor about your risk.