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NCI Dictionary of Cancer Terms

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NCI Dictionary of Cancer Terms



hexyl 5-aminolevulinate  listen  (HEK-sul 5-uh-MEE-noh-LEH-vyoo-LIH-nayt)

  A substance that is used to find and kill tumor cells. It enters tumor cells and becomes activated when exposed to a special type of light. A chemical reaction causes the cells to produce fluorescent light and die.