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ER-negative PR-negative HER2/neu-negative

Definition / meaning of ER-negative PR-negative HER2/neu-negative

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

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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