NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,910 terms related to cancer and medicine.

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progression-free survival
(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.