NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,989 terms related to cancer and medicine.
- listen (eh-fuh-PROK-sih-rul)
- A substance being studied in the treatment of brain tumors and some other types of cancer. It increases the amount of oxygen in tumor tissues, which may make the tumor cells easier to kill with radiation therapy. Efaproxiral is a type of radiosensitizing agent. Also called RSR13.