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U.S. National Institutes of Health National Cancer Institute
Dictionary of Cancer Terms
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NDGA

 Nordihydroguaiaretic acid. A drug put on the skin to treat growths caused by sun exposure. A form of NDGA that is taken by mouth is being studied in the treatment of prostate cancer. NDGA is an antioxidant, and it may block certain enzymes needed for tumor growth. Also called nordihydroguaiaretic acid, masoprocol, and Actinex.

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