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Alpha-Aminobutyric Acid, Cerebrospinal Fluid — Substance Concentration

Published: August 9, 2026Updated: August 16, 2026

Measures alpha-aminobutyric acid in cerebrospinal fluid to help evaluate amino acid metabolism and certain metabolic or neurologic disorders.

Quick summary

["This test measures alpha-aminobutyric acid in spinal fluid; results are best interpreted by your clinician alongside other findings."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
26586-8
Short code
A-Aminobutyr CSF-sCnc
Synonyms
A-Aminobutyr CSF-sCnc
Category
liver
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

What is this test?

Alpha-aminobutyric acid is an amino acid. This test measures its concentration in cerebrospinal fluid, the fluid surrounding the brain and spinal cord. It is a specialized test that may be used to evaluate suspected disturbances in amino acid metabolism.

Why might I need this test?

Your clinician may order this test when symptoms suggest an inherited metabolic condition, a problem with amino acid processing, or certain neurologic disorders. It may also be used as part of a broader evaluation of unexplained developmental, seizure, or movement symptoms.

How is the test performed?

Cerebrospinal fluid is usually collected by lumbar puncture, also called a spinal tap. A clinician inserts a thin needle into the space around the spinal cord and removes a small amount of fluid for laboratory analysis.

How do I prepare for the test?

There is usually no special preparation, but your clinician may provide specific instructions for this uncommon test. Tell the healthcare team about any bleeding disorders, blood-thinning medicines, back problems, or previous reactions to local anesthetic before the procedure.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CSF Alpha-Aminobutyric Acid

Frequently asked questions

Is this the same as a routine amino acid blood test?
No. This test measures alpha-aminobutyric acid in cerebrospinal fluid, not in blood. Blood amino acid testing is a separate and more commonly performed test.
Is a lumbar puncture painful?
Most people feel pressure or brief discomfort during the procedure, although the back is usually numbed with local anesthetic. Afterward, some patients may develop a headache that improves with lying down.
Can I interpret this result on my own?
No. This is a specialized test whose meaning depends on the reason it was ordered and other clinical findings. Your ordering clinician should explain the result and any recommended next steps.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy