ER-

Definition / meaning of ER-

Describes cells that do not have a protein to which the hormone estrogen will bind. Cancer cells that are ER- do not need estrogen to grow, and usually do not stop growing when treated with hormones that block estrogen from binding. Also called estrogen receptor negative.

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Find More About 'ER-'

Source(s):

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

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