NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 8,041 terms related to cancer and medicine.

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methyl-5-aminolevulinate
(MEH-thul-5-uh-MEE-noh-LEH-vyoo-LIH-nayt)
A drug used in photodynamic therapy; it is absorbed by tumor cells and, when exposed to light, becomes active and kills the cancer cells.