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Dictionary of Cancer Terms

View in Spanish: Inhibidor de la topoisomerasa

Topoisomerase inhibitor (TOH-poh-i-SAH-meh-rays in-HIH-bih-ter)
A substance that blocks topoisomerases (enzymes that break and rejoin DNA strands and are needed for cells to divide and grow). Blocking these enzymes may kill cancer cells. Certain topoisomerase inhibitors are being studied in the treatment of cancer.

Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.