No. Although a woman with an abnormal BRCA1 or BRCA2 gene is statistically more likely to develop breast cancer than a woman without this genetic alteration, not every woman with an altered BRCA1 or BRCA2 gene will get breast cancer.
Remember, genetics is just one of a myriad of risks. An altered breast cancer gene does not guarantee cancer.
In fact, most cases of breast cancer do not involve an altered BRCA1 or BRCA2 gene. Statistics show that at most, 1 in 10 breast cancers cases involve an inherited altered gene. Furthermore, not all cases of breast cancer in women with a family history of breast cancer involves altered BRCA1 or BRCA2 genes.
|