A Family Member Tested Positive for BRCA. Here Is What That Means for You.
A positive BRCA result in your family is important information about your own health. This guide explains what it means, what your options are, and what usually happens next.
What a Family Member’s BRCA Result Means for You
- BRCA1 and BRCA2 are inherited gene mutations — they run in families. If a first-degree relative (parent, sibling, child) carries a BRCA mutation, you have approximately a 50% chance of carrying the same mutation.
- A positive result in a relative does not mean you have the mutation. It means genetic testing can now tell you definitively whether you do.
- This type of testing — called cascade testing — is one of the clearest clinical uses of hereditary genetic testing. Knowing your status guides screening decisions before any diagnosis occurs.
- Most people in this situation are encouraged to speak with a genetic counselor, who will explain the specific mutation your relative carries and what testing makes sense for you.
What This Means Clinically and What Usually Happens Next
BRCA1 and BRCA2 mutations significantly raise the lifetime risk of breast and ovarian cancer. The specific risk depends on which gene is mutated and other individual factors. A genetic counselor can give you a personalized risk estimate once your own status is known.
Not all BRCA mutations carry the same risk level. Your relative’s specific mutation — its exact location and type — matters. The genetic counselor who works with you will review your relative’s result as part of your consultation.
What Usually Happens Next
The standard next step for first-degree relatives of someone with a known BRCA mutation is a targeted single-site test — a test that looks specifically for the mutation already identified in your family. This is faster, more accurate, and typically less expensive than a full panel.
If your test is negative for the family mutation, your risk returns to population-level risk for that cancer type. If positive, your genetic counselor will walk you through screening recommendations and prevention options specific to your result.
Your Relative’s BRCA Result and Your Own Testing Path
Single-site testing vs full panel
Because your family’s mutation is already identified, you do not need a full multi-gene panel — you need a targeted test for the specific mutation your relative carries. This is the recommended approach for cascade testing.
Which relatives should consider testing
First-degree relatives (parents, siblings, children) each have a 50% chance of carrying the mutation. Second-degree relatives (aunts, uncles, grandparents) have a 25% chance. The clinical priority is first-degree relatives first.
If your relative did not share the specific mutation details
You will need to know the exact mutation (gene name, variant classification, and position) to order a targeted test. Your genetic counselor can help you obtain this from your relative’s testing lab or records.
Timing is your choice
There is no clinical urgency that requires you to test within a specific window. When you are ready to have the conversation, a genetic counselor can help you decide whether and when to test.
What This Means for Other Members of Your Family
A single positive result in your family has implications beyond you. Siblings, parents, and children of the person who tested positive each have the same 50% probability of carrying the mutation.
Genetic counselors often help families think through how to communicate a hereditary result to relatives — what to share, how to share it, and what relatives can do with the information.
- First-degree relatives (parents, siblings, children) — 50% probability
- Second-degree relatives (grandparents, aunts, uncles, nieces, nephews) — 25% probability
- The specific cancer risks vary by which gene is mutated — BRCA1 and BRCA2 carry different risk profiles
How LifeShield Can Help
Genetic counseling
A licensed genetic counselor reviews your family history and your relative’s result, and helps you understand whether and how to proceed
Targeted single-site testing
If testing is indicated, LifeShield arranges testing specific to your family’s known mutation
Results review
A post-test counseling session to explain your result and what it means for your screening and prevention options
Family communication support
Guidance on how to share hereditary risk information with other relatives who may be affected
Reviewed by LifeShield Medical Team · Last reviewed March 2026
Frequently Asked Questions
No. Each first-degree relative of someone with a BRCA mutation has approximately a 50% chance of carrying the same mutation. Genetic testing is the only way to determine your individual status.
Cascade testing is the process of testing family members of someone who has received a positive hereditary genetic result. It allows relatives to find out their own status using a targeted test rather than a full panel.
No referral is needed to speak with a genetic counselor through LifeShield. The counselor will review your family history and your relative’s result before any testing is ordered.
A genetic counselor can help you navigate this. In some situations, testing options still exist even without full access to a relative’s records.
Most eligible patients qualify for coverage when NCCN-based criteria are met. Having a first-degree relative with a known BRCA mutation is typically a covered indication. LifeShield provides insurance support and superbill assistance for all patients.
Ready to Take the Next Step?
When you are ready, a licensed genetic counselor can help you understand your options and build a clear plan.
Medical Disclaimer: This content is for informational purposes only and does not constitute medical advice. It is based on published NCCN clinical guidelines and peer-reviewed research. Always consult a qualified healthcare provider for medical decisions. LifeShield content is reviewed by board-certified genetic counselors.