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Cerebrospinal Fluid (CSF) Protein Electrophoresis

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

This test measures the different types of proteins found in your cerebrospinal fluid, which surrounds your brain and spinal cord. It helps identify abnormalities in protein distribution that may indicate conditions like multiple sclerosis, infections, or other neurological disorders.

Quick summary

["This test helps diagnose and monitor conditions affecting brain and nerve function by examining protein patterns in spinal fluid."]

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

Key facts at a glance

LOINC
35123-9
Short code
Chr 14 UpDi Bld/T Ql
Synonyms
Chr 14 UpDi Bld/T Ql
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
cytogenetics
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What Is Cerebrospinal Fluid (CSF)?

Cerebrospinal fluid (CSF) is a clear fluid that cushions your brain and spinal cord, providing nutrients and removing waste. It circulates around your central nervous system. Proteins in CSF can vary based on health, disease, or injury.

Why Is This Test Done?

Your doctor may order this test if you have symptoms like headaches, vision changes, numbness, weakness, or neurological issues. It’s also used to check for conditions like meningitis, multiple sclerosis, or tumors affecting the brain or spinal cord.

How Is the Test Performed?

A small amount of CSF is collected through a procedure called a lumbar puncture (spinal tap). A needle is inserted into your lower back, and fluid is gently taken from the spinal canal. The sample is then sent to a lab for analysis.

What Does the Test Measure?

The test separates CSF proteins using electrophoresis, a method that sorts proteins based on size and electrical charge. Different protein bands (like albumin, globulins, and immunoglobulins) are identified and measured.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CSF Protein Electrophoresis

Frequently asked questions

How can abnormal protein patterns affect my health?
Abnormal protein levels or patterns in CSF can signal serious conditions, such as multiple sclerosis (where protein bands may appear irregular), infections (like bacterial meningitis, which may show elevated protein), or tumors (which may reveal unusual protein spikes). Your doctor will interpret results in the context of your symptoms and medical history.
What are the most common reasons for this test?
Common reasons include unexplained neurological symptoms (e.g., headaches, numbness), suspected multiple sclerosis, meningitis, encephalitis, or brain tumors. It may also be used to monitor conditions like Guillain-Barré syndrome or chronic inflammatory diseases.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on lab processing times. Your doctor will discuss findings during your follow-up visit.
  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