hormone receptor negative [also called HR-]


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((HOAR-moan ree-SEP-tir NEG-uh-tiv))

Breast cancer cells without hormone receptors. These receptors are special proteins that the hormones estrogen and progesterone bind to. HR negative breast cancer cells do not depend on estrogen or progesterone to grow. Anti-estrogen hormonal therapy has no role against this type of cancer.

Read more about hormone receptor status.

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Audio contributed by: Kelly Clarkson

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