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NCI Dictionary of Cancer Terms

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NCI Dictionary of Cancer Terms



progression-free survival  listen  (pruh-GREH-shun ... ser-VY-vul)

  The length of time during and after the treatment of a disease, such as cancer, that a patient lives with the disease but it does not get worse. In a clinical trial, measuring the progression-free survival is one way to see how well a new treatment works. Also called PFS.