Doctors treating breast cancer look for markers on your particular cancer to help decide what course of treatment is best for you. That’s because cancer cells may have what are called receptors that help identify the unique features of the cancer.
The three main receptors are the estrogen receptor, the progesterone receptor, and the HER2 receptor. The estrogen and progesterone receptors go together because they are fueled by hormones. Think of the cancer cell as having little hands on the outside of the cell which grab hold of proteins that help it grow. These proteins are sometimes called “ligands.”Read More
Another important receptor to test for is the HER2 receptor. For HER2 positive breast cancers, therapies that uniquely target the HER2 receptor are essential to treating the disease.