![](https://webarchive.library.unt.edu/eot2008/20081108132333im_/http://www.cancer.gov/images/spacer.gif) |
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![](https://webarchive.library.unt.edu/eot2008/20081108132333im_/http://www.cancer.gov/images/spacer.gif)
| 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. |
Previous Definitions: | epratuzumab, Epstein-Barr virus, EPT, ER, ER+ | Next Definitions: | ERA-923, erb-38 immunotoxin, ErbB1, Erbitux, ERCP |
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