![](https://webarchive.library.unt.edu/eot2008/20081031061642im_/http://www.cancer.gov/images/spacer.gif) |
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![](https://webarchive.library.unt.edu/eot2008/20081031061642im_/http://www.cancer.gov/images/spacer.gif)
![](https://webarchive.library.unt.edu/eot2008/20081031061642im_/http://www.cancer.gov/images/spacer.gif)
| Prueba de laboratorio para determinar si las células cancerosas tienen receptores de estrógenos (proteínas a las que se unirá el estrógeno). Si las células tienen receptores de estrógenos, tal vez necesiten estrógeno para crecer y esto puede afectar la forma de tratar el cáncer. |
![](https://webarchive.library.unt.edu/eot2008/20081031061642im_/http://www.cancer.gov/images/spacer.gif)
![](https://webarchive.library.unt.edu/eot2008/20081031061642im_/http://www.cancer.gov/images/gray_spacer.gif)
![](https://webarchive.library.unt.edu/eot2008/20081031061642im_/http://www.cancer.gov/images/spacer.gif)
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![](https://webarchive.library.unt.edu/eot2008/20081031061642im_/http://www.cancer.gov/images/spacer.gif) |