HER2-positive breast cancer is a breast cancer that tests positive for a protein called human epidermal growth factor receptor 2 (HER2), which promotes the.
Some women have breast tumors with higher levels of a protein known as HER2 – these are called HER2-positive breast cancers. Breast cancer cells with higher than normal levels of HER2 are called HER2-positive. Triple-negative breast tumors don’t have too much HER2 and also don.
The HER2 gene makes HER2 proteins (also sometimes referred to as HER2/neu proteins). HER2 proteins are receptors on breast cells.