Hereditary Breast Cancer
Inherited gene changes can raise cancer risk; genetic counselling helps explain testing, results and options.
The key things to know
- Risk variants can come from either parent.
- An uncertain variant is not a confirmed positive result.
What is inherited?
A cancer-predisposing gene change can be inherited from either parent. It does not make cancer inevitable, and most breast cancers are not explained by a known inherited variant. BRCA1, BRCA2 and other genes may be considered according to personal and family history.
Counselling before testing
A specialist reviews cancer types and ages at diagnosis on both sides of the family. Counselling covers benefits, limitations, privacy and implications for relatives. Testing inherited variants in blood or saliva is different from some molecular tests performed on the tumour itself.
Understanding the result
Results may identify a pathogenic variant, show no relevant variant, or report a variant of uncertain significance. A negative result does not remove every risk. An uncertain variant should not be treated as a confirmed hereditary diagnosis or independently drive preventive surgery.
Planning next steps
Options can include enhanced imaging, risk-reducing surgery or selected medicines, and results may affect treatment of an existing cancer. Decisions balance benefit, physical effects, fertility and preferences. Sharing findings with relatives should respect your consent and include clear professional guidance.
Take these questions to your appointment
- Which test fits my family history?
- Could results change treatment or relatives' screening?
Sources & review
This is original educational content based on the sources below, not reproduced textbook material. Website supervisor: Dr. Nizar Ismail. Individual medical review of this article is pending.
- NCI — BRCA Gene Changes: Cancer Risk and Genetic Testing ↗
- CDC — Managing Risk for Hereditary Breast, Ovarian, and Related Cancers ↗
This information cannot replace diagnosis or a personal treatment plan. Consult your care team about symptoms or decisions about your treatment.
