NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,990 terms related to cancer and medicine.

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yttrium Y 90
(IH-tree-um …)
A radioactive form of the rare metal yttrium that is used in radiation therapy to treat some types of tumors. Yttrium Y 90 can be linked to a molecule, such as a monoclonal antibody, to help it locate and bind to certain substances in the body, including cancer cells. The radiation may kill the cancer cells.