NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,893 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.

epidermal growth factor receptor inhibitor
(eh-pih-DER-mul grothe FAK-ter reh-SEP-ter in-HIH-bih-ter)
A substance that blocks the activity of a protein called epidermal growth factor receptor (EGFR). EGFR is found on the surface of some normal cells and is involved in cell growth. It may also be found at high levels on some types of cancer cells, which causes these cells to grow and divide. Blocking EGFR may keep cancer cells from growing. Some epidermal growth factor receptor inhibitors are used to treat cancer. Also called EGFR inhibitor, EGFR tyrosine kinase inhibitor, and epidermal growth factor receptor tyrosine kinase inhibitor.