What are the breast cancer biomarkers?

What is the purpose of genetic testing for breast cancer biomakers?

Gaining information on your breast cancer tumor characteristics at the genetic level may give information that is useful for making treatment decisions; those are sometimes called “biomarkers.” Some clinical trials require the presence or absence of a certain biomarker / genetic alteration. Those trials may require this information in advance of application to the trial, while others may ask for a biopsy of your tumor, and perform the testing on site.

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