Cancer & Tumor MarkersNo Fasting RequiredTurnaround: 12–24 hours

Alpha-Fetoprotein (AFP — Liver & Germ Cell Tumor Marker)

Also known as: Total Serum AFP, Alpha-1-Fetoprotein, Liver Cancer Blood Test, Germ Cell Tumor Marker, AFP Tumor Marker

Parameters Measured in the Report

A breakdown of individual biomarkers and biological reference intervals typically found in your report:

Biomarker	Standard Range	Unit	What It Means
Serum Alpha-Fetoprotein (AFP) (Total AFP)	Normal Adults: < 7.0–10.0 (Cirrhotic Flare: 10.0–20.0 HCC Highly Suspicious: > 20.0 Diagnostic > 200–400)	ng/mL (or IU/mL = ng/mL ÷ 1.21)	Oncofetal glycoprotein tumor marker; primary surveillance tool for liver cancer and testicular germ cell tumors.

* Note: Reference ranges may vary slightly between testing instruments and reagent kits. Always refer to the reference interval printed on your specific pathology report.

Clinical Focus

Circulating concentration of oncofetal plasma glycoprotein synthesized by fetal yolk sac and fetal hepatocytes.

Sample & Specimen

Venous blood (Serum tube)

Fasting Protocol

No fasting required. Maintain regular water intake.

Turnaround Time

12–24 hours

What Is This Test?

Alpha-Fetoprotein (AFP) is the principal plasma protein produced during early embryonic development by the fetal yolk sac and liver, serving functions analogous to adult serum albumin. Shortly after birth, the AFP gene is repressed, and circulating levels fall to minute traces in adult blood. In adult oncology, de-repression of the AFP gene occurs in **Hepatocellular Carcinoma (HCC)** and **Non-Seminomatous Testicular Germ Cell Tumors**. In patients living with chronic liver cirrhosis or chronic Hepatitis B and C infections, routine 6-month surveillance combining Serum AFP with abdominal ultrasound allows early detection of liver tumors while they are still surgically curable.

Why Did Your Doctor Order This Test?

Physicians routinely prescribe the AFP Test in the following clinical scenarios:

Mandatory 6-month surveillance for Hepatocellular Carcinoma (HCC) in all patients with liver cirrhosis (viral, alcoholic, or NASH)

Routine surveillance in chronic Hepatitis B carriers even in the absence of established cirrhosis

Diagnostic evaluation and staging of testicular tumors in young men (distinguishing non-seminoma from pure seminoma)

Monitoring clinical response to surgical resection, liver transplantation, or transarterial chemoembolization (TACE)

Prenatal screening (Maternal Serum AFP / Quad Screen) in the second trimester to detect fetal neural tube defects (spina bifida) or Down syndrome

How to Prepare Before Your Test

Fasting Requirement: No fasting required. Maintain regular water intake.

No fasting or special preparation required.

Understanding Your Results

What higher or lower readings generally mean in clinical practice:

If Values Are Higher Than Normal

An AFP level exceeding 200–400 ng/mL in a cirrhotic patient with a confirmed hypervascular liver lesion on dynamic contrast CT or MRI is virtually diagnostic of Hepatocellular Carcinoma. In young males with a testicular mass, elevated AFP confirms a Non-Seminomatous Germ Cell Tumor (yolk sac element or embryonal carcinoma).

If Values Are Lower Than Normal

A normal AFP (<10 ng/mL) is healthy and reassuring. During post-treatment cancer surveillance, maintaining baseline normal AFP confirms tumor clearance.

Frequently Asked Questions

Why do cirrhotic patients need both an ultrasound and an AFP blood test every 6 months?

Approximately 20% to 30% of small, early-stage liver cancers do not secrete elevated AFP, but can be spotted on ultrasound. Conversely, small tumors hidden deep inside a nodular, scarred cirrhotic liver might be missed on ultrasound but caught by a rising AFP. Together, they provide high diagnostic sensitivity.

Can non-cancerous conditions cause a mild elevation in AFP?

Yes. During acute viral hepatitis flares or active liver regeneration (after toxic injury), hepatocytes divide rapidly and can temporarily release modest amounts of AFP (typically 10 to 50 ng/mL), which resolves as the liver heals.

Related Laboratory Tests

Tests frequently prescribed together or used as follow-up investigations:

Hepatitis B Surface Antigen (HBsAg)

Qualitative and quantitative detection of Hepatitis B virus outer surface envelope protein in blood.

Hepatitis C Antibody (Anti-HCV)

Qualitative and semi-quantitative detection of host IgG antibodies directed against Hepatitis C viral structural proteins.

Liver Function Test (LFT / Hepatic Panel)

Bilirubin fractions, transaminases (ALT/SGPT, AST/SGOT), Alkaline Phosphatase (ALP), and proteins (Albumin, Globulin).

Beta-hCG Quantitative (Human Chorionic Gonadotropin)

Quantitative concentration of the intact beta subunit of human chorionic gonadotropin hormone.

Medical & Diagnostic Disclaimer

This guide is published for educational and patient informational purposes only. It is not a substitute for professional medical evaluation, diagnosis, or clinical advice.

A laboratory result that falls slightly outside standard statistical reference intervals does not automatically indicate disease; conversely, a normal result does not guarantee the absence of medical conditions. Only your attending physician can interpret lab findings in the context of your medical history, physical exam, and symptoms.