alpha-fetoprotein

Definition / meaning of alpha-fetoprotein

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

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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