Breast cancers are ER-positive, HER2-positive, or triple negative. The type of breast cancer you have determines the type of medication you.
Breast cancer cells taken out during a biopsy or surgery will be tested to see if they have certain proteins that are estrogen or progesterone receptors. When the .
Your pathology report will include the results of a hormone receptor assay, a test that tells you whether or not the breast cancer cells have.
Estrogen receptor (ER) expression is the main indicator of potential responses to endocrine therapy (ET), and approximately 70% of human breast cancers.