What does HER2 stand for?
Human epidermal growth factor receptor 2 (HER2) is a receptor protein located on the surface of breast cells. This protein binds growth factors and stimulates cell growth and division. Breast tumor cells with a positive (+) HER2 status have high levels of HER2 on their surface. This may result in an increased ability to grow and spread. Importantly, these types of breast cancer may be treated with a type of targeted therapy.
