NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,018 terms related to cancer and medicine.
- expanded access trial
- listen (ek-SPAN-ded AK-ses TRY-ul)
- A way to provide an investigational therapy to a patient who is not eligible to receive that therapy in a clinical trial, but who has a serious or life-threatening illness for which other treatments are not available. Expanded access allows a patient to receive promising but not yet fully studied or approved cancer therapies when no other treatment option exists. Also called compassionate use trial.