NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,106 terms related to cancer and medicine.
We offer a widget that you can add to your website to let users look up cancer-related terms. Get NCI’s Dictionary of Cancer Terms Widget.
- adverse event
- listen (AD-vers eh-VENT)
- An unexpected medical problem that happens during treatment with a drug or other therapy. Adverse events do not have to be caused by the drug or therapy, and they may be mild, moderate, or severe. Also called adverse effect.