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NCI Dictionary of Cancer Terms

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topoisomerase II inhibitor RTA 744  listen  (TOH-poh-i-SAH-meh-rays ... in-HIH-bih-ter ...)

  A substance being studied in the treatment of adult brain tumors. Topoisomerase II inhibitor RTA 744 crosses the blood-brain barrier and blocks an enzyme needed for cancer growth. It is a type of topoisomerase inhibitor. Also called RTA 744.