Genetic tests that detect mutations in the BRCA1 and BRCA2 tumor-suppressor genes are widely available. These tests reveal a number of mutations in these genes—mutations that have been linked to familial breast cancer. Assume that a young woman in a suspected breast cancer family takes the BRCA1 and BRCA2 genetic tests and receives negative results. That is, she does not test positive for the mutant alleles of BRCA1 or BRCA2. Can she consider herself free of risk for breast cancer?

Hello, everyone here. We have a question that says, besides genetic testing of braCA one or BRCA two mutation, what is the other most important data source to diagnose breast cancer? So first, the most important sources, of course going to be testing for braca one or braca, too. But if neither of those mutations occur, family history is going to be the most important data source to diagnose breast cancer. So our answer is C Family history. Thank you for watching. Bye.