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AFP test

Also called: Alpha-fetoprotein, AFP tumor marker

AFP is a protein used to watch for liver cancer in people with cirrhosis or hepatitis B, and for some testicular cancers.

SampleA small tube of blood from a vein in your arm
Fasting?Usually not needed
ResultsSeveral days
Good to knowOne result rarely tells the whole story. Your provider looks at your results together with your symptoms, exam, and other tests.

What the test is

In pregnancy, AFP is part of prenatal screening and means something different.

Why it's done

  • Liver cancer surveillance with cirrhosis (with an ultrasound every 6 months)
  • Following some cancers

Getting ready and what happens

  • No preparation is needed.

How the test is done

  • A health worker cleans the skin, puts a band around your arm, and draws blood from a vein with a small needle. It takes a few minutes.

What the results mean

High

Needs imaging to look for a cause.

Questions to ask your provider

  • What do my results mean for me?
  • Do I need to repeat this test or have other tests?

Risks

A blood draw is very safe. You may have slight pain or a small bruise where the needle went in.

Related conditions

Related tests

Sources

Last updated 2026-11-13.