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Glossary: triple-negative breast cancer, Masonic Cancer Center, University of Minnesota

triple-negative breast cancer

(TRIH-pul-NEH-guh-tiv brest KAN-ser)

Describes breast cancer cells that do not have estrogen receptors, progesterone receptors, or large amounts of HER2/neu protein. Also called ER-negative PR-negative HER2/neu-negative breast cancer.

Triple-negative breast cancer is defined by a lack of expression of estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER2/neu). Also called ER-negative PR-negative HER2/neu-negative breast cancer.

GeneticsHealth professional2009-07-02