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NCI Dictionary of Cancer Terms


alpha-fetoprotein  listen  (AL-fuh-FEE-toh-PROH-teen)

  A protein normally produced by a fetus. Alpha-fetoprotein levels are usually undetectable in the blood of healthy adult men or women (who are not pregnant). An elevated level of alpha-fetoprotein suggests the presence of either a primary liver cancer or germ cell tumor. Also called AFP.