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Cerebrospinal Fluid Total Protein by Electrophoresis

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

This test measures the total protein levels in your cerebrospinal fluid (CSF) using electrophoresis, a method that separates proteins based on size and charge. It helps identify abnormalities in protein distribution that may indicate conditions like infections, inflammation, or neurological disorders.

Quick summary

["Assessing protein patterns in CSF to diagnose or monitor potential neurological issues."]

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

Key facts at a glance

LOINC
38865-2
Short code
RFA Carot a+Cereb a.ext-L Vs W contr IA
Synonyms
RFA Carot a+Cereb a.ext-L Vs W contr IA
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
rf-angio
CPT
86430
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms like headaches, neck stiffness, confusion, or neurological problems. It can also be used to monitor conditions such as multiple sclerosis, meningitis, or brain tumors. Sometimes, it’s part of a broader evaluation for unexplained neurological symptoms or after a head injury.

What to Expect Before the Test

You’ll likely have a lumbar puncture (spinal tap) performed, where a small needle is inserted into your lower back to collect CSF. The procedure is usually quick but may cause mild discomfort. No special preparation is needed, but inform your doctor about any medications you’re taking.

What the Test Results Mean

Normal results show a balanced distribution of proteins, while abnormal patterns may reveal elevated or fragmented proteins. For example, high protein levels could suggest inflammation or infection, while unusual bands might indicate conditions like Guillain-Barré syndrome or certain tumors.

Common Conditions This Test Helps Diagnose

This test can help diagnose or evaluate conditions such as meningitis, encephalitis, multiple sclerosis, subarachnoid hemorrhage, or certain types of brain tumors. It may also be used to monitor treatment progress or rule out other neurological disorders.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: How This Test Contributes to Diagnosis

Short name

CSF Protein Electrophoresis

Frequently asked questions

How is CSF protein electrophoresis different from a general protein test in blood?
CSF protein electrophoresis provides a detailed breakdown of protein types in the fluid surrounding your brain and spinal cord, unlike blood protein tests that only measure total protein levels. This specificity helps pinpoint the cause of neurological symptoms by identifying abnormal protein patterns.
Can this test detect early signs of neurological diseases?
Yes, it can detect early signs by revealing abnormal protein distributions that may not be visible in blood tests. For example, elevated albumin or immunoglobulin bands can indicate inflammation, infections, or demyelinating diseases like multiple sclerosis.
What should I do if my test results show abnormal protein levels?
If results are abnormal, your healthcare provider will discuss next steps, which may include additional tests, closer monitoring, or treatment adjustments. Follow their guidance to address any underlying condition.
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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