NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,846 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.

Describes cells that have a receptor protein that binds the hormone estrogen. Cancer cells that are ER+ may need estrogen to grow, and may stop growing or die when treated with substances that block the binding and actions of estrogen. Also called estrogen receptor positive.