What is the purpose of the BrCA1 and BrCA2 blood test?

The purpose of the BrCA1 and BrCA2 blood test is to assess genetic risk for breast cancer. These genes are critical because mutations in either of them significantly increase a person's likelihood of developing breast and ovarian cancers. The test identifies whether a person has inherited mutations in these genes, which can lead to a higher risk of cancer.

Understanding a patient's genetic predisposition is vital for proactive health management, including increased surveillance, preventive measures, and personalized treatment options. Taking this test allows individuals with a family history or other risk factors to make informed decisions about their health and potential preventive strategies.

The other options focus on aspects unrelated to the primary function of the BrCA1 and BrCA2 tests. For instance, while detecting cancer presence or screening for other cancer types is crucial in patient management, it does not fall under the function of these genetic tests. Similarly, measuring hormone levels is relevant in other contexts, such as assessing hormonal influence on tumors, but does not relate to genetic testing for breast cancer risk.