Hormone Receptor Status and Diagnosis

Understanding the results of Estrogen and Progesterone biomarker tests is important, because this information affects your treatment as well as your follow-up care, if you’ve been diagnosed with breast cancer. Here's what the test results mean, and whether you may need other tests.

Image of the HER2 Molecule is courtesy of RCSB Protein Data Bank. PDB ID: 1A52, Tanenbaum, D.M., Wang, Y., Sigler, P.B., Crystallographic comparison of the estrogen and progesterone receptor's ligand binding domains. Proc.Natl.Acad.Sci.USA v95 pp.5998-6003, 1998.