Skip to content

Cerebrospinal Fluid (CSF) Protein, Total Concentration

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

This test measures the total amount of protein found in your cerebrospinal fluid (the fluid surrounding your brain and spinal cord). Protein levels can help identify issues like inflammation, infections, or blood leaks in the central nervous system.

Quick summary

["Protein in CSF may signal neurological conditions or injury."]

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

Key facts at a glance

LOINC
110927-1
Short code
RUBV Ab Msmt CSF
Synonyms
RUBV Ab Msmt CSF
Category
chemistry
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 Cerebrospinal Fluid (CSF)?

Cerebrospinal fluid (CSF) is a clear, watery fluid that cushions your brain and spinal cord, protecting them from injury. It also carries nutrients and removes waste. When taken for testing, CSF is usually collected through a procedure called a lumbar puncture (spinal tap).

Why Is This Test Done?

Doctors may order this test to investigate symptoms like headaches, neck stiffness, seizures, or neurological problems. Elevated protein levels can suggest conditions such as infections (e.g., meningitis), multiple sclerosis, or tumors affecting the brain or spinal cord.

How Is the Test Performed?

A healthcare provider will collect CSF using a needle inserted into your lower back. The fluid is then sent to the lab for analysis. The test involves measuring the total protein content in the sample, which is typically done using a specialized immunoassay or nephelometry method.

What Are Possible Results?

Results are not given in a single numeric range because protein levels can vary widely depending on the cause. High protein levels may indicate inflammation, infection, or blood contamination, while normal levels help rule out certain conditions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

CSF Protein Total

Frequently asked questions

What Does It Mean If My Results Are Abnormal?
If your CSF protein test shows elevated levels, your doctor may recommend further testing to determine the underlying cause. Common reasons include infections (e.g., bacterial or viral meningitis), demyelinating diseases (e.g., multiple sclerosis), or other neurological disorders. Low protein levels are less common but may occur in rare cases of CSF leakage or specific genetic conditions.
What Are Common Causes of High CSF Protein?
High protein levels in CSF are often linked to inflammation, infections (such as meningitis or encephalitis), or blood entering the CSF (hemorrhage). Conditions like multiple sclerosis, Guillain-Barré syndrome, or certain tumors may also cause elevated protein levels.
How Often Should I Get This Test?
The frequency depends on your symptoms and medical history. Your doctor may recommend retesting if symptoms persist or if further evaluation is needed. Follow-up tests could include additional CSF analysis, imaging, or other diagnostic procedures.
  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