![](https://webarchive.library.unt.edu/eot2008/20081101095952im_/http://www.nci.nih.gov/images/spacer.gif) |
¿Preguntas sobre el cáncer?
![](https://webarchive.library.unt.edu/eot2008/20081101095952im_/http://www.nci.nih.gov/images/spacer.gif)
|
1-800-422-6237
(1-800-4-CANCER)
|
![](https://webarchive.library.unt.edu/eot2008/20081101095952im_/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/eot2008/20081101095952im_/http://www.nci.nih.gov/images/spacer.gif) |
|
![](https://webarchive.library.unt.edu/eot2008/20081101095952im_/http://www.nci.nih.gov/images/spacer.gif)
![](https://webarchive.library.unt.edu/eot2008/20081101095952im_/http://www.nci.nih.gov/images/spacer.gif)
| Recuerdo poco placentero o idea que se presenta a menudo en los pensamientos diarios de una persona y le impide pensar en otras cosas. Los pensamientos interferentes dificultan el sueño e impiden que la persona realice sus actividades diarias. También se llama pensamiento intruso. |
![](https://webarchive.library.unt.edu/eot2008/20081101095952im_/http://www.nci.nih.gov/images/spacer.gif)
![](https://webarchive.library.unt.edu/eot2008/20081101095952im_/http://www.nci.nih.gov/images/gray_spacer.gif)
![](https://webarchive.library.unt.edu/eot2008/20081101095952im_/http://www.nci.nih.gov/images/spacer.gif)
|
![](https://webarchive.library.unt.edu/eot2008/20081101095952im_/http://www.nci.nih.gov/images/spacer.gif) |