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(proh-GREH-shun)
![](https://webarchive.library.unt.edu/eot2008/20081026084036im_/http://www.nci.nih.gov/images/spacer.gif)
| In medicine, the course of a disease, such as cancer, as it becomes worse or spreads in the body. |
Previous Definitions: | progesterone receptor test, progestin, prognosis, prognostic factor, programmed cell death | Next Definitions: | progression-free survival, progressive disease, prolactin, Proleukin, proliferating |
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