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Neurofilament Light Chain in Cerebrospinal Fluid (CSF) – Quantitative

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

This test measures the levels of neurofilament light chain, a protein found in nerve cells, in your cerebrospinal fluid. It helps assess nerve damage or disease in the brain and spinal cord.

Quick summary

["Neurofilament CSF may help diagnose or monitor conditions affecting nerves."]

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

Key facts at a glance

LOINC
101449-7
Short code
Neurochondrin Ab CSF Ql CBA IFA
Synonyms
Neurochondrin Ab CSF Ql CBA IFA
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
cba-ifa
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms like memory loss, weakness, numbness, or balance issues that could suggest nerve damage. It’s also used in research or clinical trials studying neurodegenerative diseases.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your back to collect CSF through a procedure called a lumbar puncture. You may feel pressure or a mild ache, but it’s usually brief.

What the Results Mean

Elevated levels of neurofilament light chain in CSF may indicate nerve damage or disease, such as multiple sclerosis, amyotrophic lateral sclerosis (ALS), or traumatic brain injury. Lower or normal levels suggest fewer issues with nerve cells.

Common Conditions Monitored

This test is primarily used in research or specialized clinical settings to study conditions like neurodegenerative diseases, traumatic brain injury, or inherited nerve disorders.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Neurofilament CSF plays a key role in detecting early nerve damage in conditions where standard tests may not be sufficient. It’s not routinely used for all patients but is valuable in specific diagnostic or research contexts.

Short name

Neurofilament CSF

Frequently asked questions

How is this test different from blood tests for nerve-related conditions?
Unlike blood tests, which check for markers like troponin or cytokines, neurofilament CSF specifically measures proteins released from nerve cells in the central nervous system. It’s more targeted for nerve-specific damage.
Can this test be done at home?
No, this test requires a lumbar puncture in a clinical setting, so it cannot be done at home. It’s a specialized procedure performed by trained medical professionals.
What if my results are abnormal?
If your results are abnormal, your healthcare provider will discuss them with you and may recommend further testing or treatments based on your symptoms and medical history.
  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