ER+ [also called estrogen receptor positive]

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(ee-are POZ-uh-tiv)

Breast cancer cells that have estrogen receptors. Estrogen receptors are special proteins that the hormone estrogen binds to. Breast cancer cells that are ER+ depend on estrogen to grow. Anti-estrogen hormonal therapy blocks the receptors or reduces the amount of estrogen that can get into the receptors. As a result, the cancer cells may shrink or die.

Read more about hormone receptor status.

Weiss marisa tcm8 329674

Audio contributed by: Marisa Weiss, M.D.

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