Should I get tested for BRCA if no one in my family has had breast cancer?

For most people without family history, current clinical guidelines do not recommend routine BRCA testing. Here is why.

BRCA1 and BRCA2 variants are present in roughly 1 in 400 people in the general population, but in 1 in 40 people of Ashkenazi Jewish descent and in elevated rates in some other founder populations. Without family history or ethnic risk factor, the prior probability of carrying a pathogenic variant is low. Testing a low-risk population produces a high rate of false positives and inconclusive results that lead to anxiety and follow-up tests without clear benefit.

Where clinical guidelines do recommend testing: family history of breast cancer (particularly before age 50), ovarian cancer at any age, male breast cancer, multiple cancers in the same person, or Ashkenazi Jewish ancestry.

Some people choose to test anyway, on the principle that knowing is better than not. That is a legitimate personal choice. If you do test, do it properly - through a clinical lab with a genetic counsellor, not through a consumer kit that screens only a handful of the thousands of possible BRCA variants. A negative consumer result is not a clean bill of health; it only tells you that you don't carry the small set of variants that test happened to check.

If you have specific reasons for concern that aren't family history - say, you just lost a friend to breast cancer and the question won't leave you - talk to a counsellor. They will help you think through whether testing makes sense for you.

One small addition. Some people of South Asian descent specifically ask about this because BRCA-positive cases in Indian patients are sometimes the first BRCA-positive case in the family, since family history records often don't go beyond two generations in our communities.

If you are South Asian and aware that detailed multi-generational health history is hard to come by in your family, that's a reasonable thing to mention to a genetic counsellor when discussing whether to test. It doesn't automatically change the recommendation, but it changes the conversation.