NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,107 terms related to cancer and medicine.
- RU 486
- A drug used to end early pregnancies. It is also being studied in the treatment of some types of cancer and other conditions. RU 486 blocks the action of progesterone, a hormone that helps some cancers grow. It is a type of antiprogesterone. Also called Mifeprex and mifepristone.