Breast Cancer & Genes

BRCA1 & BRCA2 genes

Studies have identified that the BRCA1 & BRCA2 genes are the genes that work to keep breast cells growing normally. If you have an abnormality in these genes, they MAY cause errors in the replication of cells, leading to the formation of tumors. If you have genetic testing done, and receive a positive test for the abnormal BRCA1 or BRCA2 gene, this does NOT mean that you will definitely get breast cancer.

Of all cases of Breast Cancer in North America, only 10% are caused by this defective gene. That means 90% of breast cancers are NOT genetic in origin. Remember, this is a gene that we all have. If your test is positive, it means that you have an abnormal BRCA1 or 2 gene, it does not mean that you will get breast cancer. If you have a close family member that has had breast cancer, either from your mother's or father's family, you may have a higher risk factor than someone who does not. But, since that person's breast cancer may or may not have been genetic in nature, it does not necessary signify that breast cancer is also in your future. It does mean that you should be more diligent with your breast self-exam, and discuss with your doctor whether you should be receiving regular mammograms.