NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,798 terms related to cancer and medicine.
Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.
- In cancer, the length of time after primary treatment for a cancer ends that the patient survives without any signs or symptoms of that cancer. In a clinical trial, measuring the DFS is one way to see how well a new treatment works. Also called disease-free survival, relapse-free survival, and RFS.