BRCA Genetic Testing

BRCA genetic testing looks for inherited changes in the BRCA1 and BRCA2 genes. These genes help cells repair damaged DNA; a pathogenic change can increase the chance of certain cancers, including breast and ovarian cancer. Testing usually uses a blood or saliva sample and may be ordered as a focused test or part of a wider panel. A result describes inherited risk; it does not diagnose cancer by itself.

BRCA genetic testing analyses inherited DNA changes to clarify cancer risk and guide personalised prevention or screening.

A healthcare professional reviews your personal and family history before testing and explains what the result could mean for you and relatives. After consent, a sample is collected and the laboratory analyses the relevant DNA. Results are explained with attention to whether a pathogenic variant, no clinically significant variant, or a variant of uncertain significance was found. The plan may include screening, specialist referral or discussion of risk-reducing choices.

The sample collection may cause brief discomfort, bruising or light-headedness, while saliva collection has little physical effect. The more significant concerns are emotional and practical: a result may cause anxiety, affect family conversations or create uncertainty when a variant is not yet understood. Genetic counselling helps interpret the finding, protect privacy and separate a confirmed inherited change from an uncertain result. Tell the team if the result is causing distress.

Testing does not remove cancer risk and cannot predict exactly whether an individual will develop cancer. Its value is that a clear inherited result can make screening and prevention discussions more tailored, while a negative result may redirect attention to family history and other factors. Results can also help relatives decide whether they need their own assessment. Management decisions should follow a specialist interpretation of the result.

Testing can be considered before or after a cancer diagnosis. The laboratory report uses precise terms, and a variant of uncertain significance is not treated like a confirmed harmful change. A positive result is shared with you confidentially and may have implications for blood relatives.

Testing may be offered when someone has a personal history suggesting inherited risk, a strong pattern of breast or ovarian cancer in the family, a known familial BRCA change, or a cancer type linked with BRCA-related risk. The route may begin with a [Genetic Counselling](/treatments/risk-reduction-and-prevention/genetic-counselling/) appointment. A specialist can explain whether testing is appropriate and whether testing an affected relative first would clarify the family result.

First, a clinician maps relevant family history and confirms consent. Next, blood or saliva is collected and sent to a genetics laboratory. The laboratory may use [Next-Generation Sequencing](/technology/next-generation-sequencing/) to read selected genes, with additional analysis when needed. A qualified professional explains the report, records the result securely and discusses screening, relatives and prevention options. Ask how long interpretation may take and who will arrange follow-up.

There is usually no physical recovery period beyond the sample collection. The meaningful next step is a results appointment, where the report is translated into a monitoring or prevention plan. Keep the report available for future clinicians and tell relatives only when you feel ready, ideally with support. Follow-up may change if laboratory knowledge or your family history changes.

A test can miss a change outside the regions or genes examined, and a negative result cannot erase a strong family history. An uncertain variant may remain unresolved. The result can also affect how you feel about future cancer risk and family communication. Ask who can access the result, what support is available and whether re-interpretation is possible.

If testing is not suitable or does not explain the family pattern, care may be based on personal history and family history. Options can include enhanced screening, medication discussions or referral to a specialist. For some people with a confirmed inherited risk, [Risk-Reducing Mastectomy](/treatments/risk-reduction-and-prevention/risk-reducing-mastectomy/) may be discussed. A [BRCA Gene Mutation](/conditions/brca-gene-mutation/) result can also affect conversations about [Ovarian Cancer](/conditions/ovarian-cancer/) risk.

Choose a service that offers qualified genetic counselling, laboratory testing and a clear results pathway. Take a family history, previous genetic reports and cancer records if available. Ask whether the test is focused or a panel, what uncertain findings mean, how relatives can be assessed and which specialist will coordinate screening or prevention afterwards.