BRCAPro-Style Risk Estimator
Enter your personal and family history details to get an educational estimate of hereditary BRCA1/BRCA2 mutation probability.
Important: This is a simplified educational tool, not the official clinical BRCAPRO model. For medical decisions, consult a genetics professional.
What Is the BRCAPRO Calculator?
BRCAPRO is a family-history-based statistical model used to estimate the probability that a person carries a harmful variant in BRCA1 or BRCA2. These genes are linked with hereditary breast and ovarian cancer syndrome. In clinical settings, providers combine model outputs with detailed pedigree review, pathology data, and professional guidelines.
How This BRCAPro-Style Tool Works
The calculator above uses common hereditary cancer risk signals to produce a rough percentage estimate. It is designed to help you understand which history patterns tend to increase mutation probability.
Inputs that increase estimated risk
- Multiple close relatives with breast cancer
- Ovarian cancer in close relatives
- Early age of diagnosis (especially before age 50)
- Male breast cancer in the family
- Bilateral breast cancer
- Ashkenazi Jewish ancestry
- Known BRCA mutation in a blood relative
How to Interpret Your Result
Your output includes a percentage and a category:
- Low (<5%): hereditary mutation appears less likely from available inputs.
- Moderate (5–9.9%): consider discussing family history updates at routine care visits.
- Elevated (10–19.9%): genetic counseling may be appropriate.
- High (20%+): prompt professional assessment is usually recommended.
Different organizations use different thresholds for testing referrals. A licensed genetics clinic can apply formal risk models and current NCCN/ASCO recommendations.
Why Professional Genetic Counseling Matters
Clinical risk assessment is more than a single score. A counselor typically reviews:
- Three-generation family pedigree
- Cancer types, ages at diagnosis, and pathology details
- Ethnicity and ancestry factors
- Prior genetic testing in relatives
- Potential involvement of non-BRCA genes (e.g., PALB2, CHEK2, ATM)
This broader context can meaningfully change next steps, including whether multigene panel testing is indicated.
Common Next Steps if Risk Is Elevated
1) Confirm family history quality
Collect exact cancer diagnoses and ages when possible. “Female cancer” or “stomach issue” entries are often too vague for accurate modeling.
2) Book a genetics appointment
Ask your primary doctor, gynecologist, or oncology clinic for a referral to cancer genetics.
3) Discuss testing strategy
When possible, testing an affected relative first can improve interpretation for the whole family.
4) Plan screening and prevention
Depending on results, your care team may recommend earlier imaging, MRI protocols, chemoprevention, or risk-reducing surgery conversations.
Limitations of Online Risk Calculators
- They may not include all genes or syndrome patterns.
- They depend heavily on the accuracy of family history data.
- They cannot diagnose cancer or confirm mutation status.
- They do not replace shared decision-making with clinicians.
Use this calculator as a learning step—not a final answer.