NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,879 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.
- F-18 FES
- A radiolabeled substance being studied as an imaging agent in breast cancer. F-18 FES binds to estrogen receptors and gives off radiation that can be detected by a PET scan. The PET scan forms an image that shows where cancer cells with estrogen receptors can be found in the body. It is a type of radioimaging agent. Also called F-18 16 alpha-fluoroestradiol.