Dictionary of Cancer Terms
View in Spanish: Supervivencia sin evolución
Progression-free survival (pruh-GREH-shun ser-VY-vul)
The length of time during and after treatment in which a patient is living with a disease that does not get worse. Progression-free survival may be used in a clinical study or trial to help find out how well a new treatment works. Also called PFS.
Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.