![](https://webarchive.library.unt.edu/eot2008/20081104161036im_/http://www.nci.nih.gov/images/spacer.gif) |
¿Preguntas sobre el cáncer?
![](https://webarchive.library.unt.edu/eot2008/20081104161036im_/http://www.nci.nih.gov/images/spacer.gif)
|
1-800-422-6237
(1-800-4-CANCER)
|
![](https://webarchive.library.unt.edu/eot2008/20081104161036im_/http://www.nci.nih.gov/images/spacer.gif)
|
Llame de lunes a viernes de 9:00 a.m. a 4:30 p.m., hora local en Estados Unidos y sus territorios. |
|
![](https://webarchive.library.unt.edu/eot2008/20081104161036im_/http://www.nci.nih.gov/images/spacer.gif) |
|
![](https://webarchive.library.unt.edu/eot2008/20081104161036im_/http://www.nci.nih.gov/images/spacer.gif)
![](https://webarchive.library.unt.edu/eot2008/20081104161036im_/http://www.nci.nih.gov/images/spacer.gif)
| Medida del porcentaje de células de un tumor que están en la fase del ciclo celular durante el que se sintetiza el ADN. La fracción de fase S se puede usar con el índice de proliferación para brindar una comprensión más completa de la rapidez de crecimiento de un tumor. |
![](https://webarchive.library.unt.edu/eot2008/20081104161036im_/http://www.nci.nih.gov/images/spacer.gif)
![](https://webarchive.library.unt.edu/eot2008/20081104161036im_/http://www.nci.nih.gov/images/gray_spacer.gif)
![](https://webarchive.library.unt.edu/eot2008/20081104161036im_/http://www.nci.nih.gov/images/spacer.gif)
|
![](https://webarchive.library.unt.edu/eot2008/20081104161036im_/http://www.nci.nih.gov/images/spacer.gif) |