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Questions About Cancer? 1-800-4-CANCER

NCI Dictionary of Genetics Terms

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ER-negative PR-negative HER2/neu-negative breast cancer


ER-negative PR-negative HER2/neu-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 triple-negative breast cancer.