Skip to content

Cerebrospinal Fluid (CSF) Protein by Turbidimetry

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

This test measures the total protein content in your cerebrospinal fluid, which is the fluid surrounding your brain and spinal cord. It helps assess conditions affecting the brain and spinal cord.

Quick summary

["Protein levels in CSF can signal inflammation, bleeding, or other neurological issues."]

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

Key facts at a glance

LOINC
24963-1
Short code
CT L-spine
Synonyms
CT L-spine
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ct
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

Doctors may order a CSF protein test to investigate symptoms like headaches, seizures, confusion, or neurological problems. It can also help diagnose conditions such as infections, tumors, multiple sclerosis, or other brain/spinal cord disorders.

What to Expect Before the Test

You’ll likely have a lumbar puncture (spinal tap) where a small needle is inserted into your lower back to collect CSF. The procedure is usually quick and may cause mild discomfort. No special preparation is needed beyond staying hydrated.

What the Results Mean

Higher-than-normal protein levels might suggest inflammation, infection, or bleeding in the brain/spinal cord. Lower-than-normal levels could indicate certain genetic or metabolic disorders. Your doctor will interpret results in the context of your symptoms and medical history.

Common Conditions Monitored

This test is often used to monitor conditions like meningitis, encephalitis, multiple sclerosis, or tumors (e.g., brain cancer). It may also help track responses to treatment for these conditions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CSF Protein

Frequently asked questions

What does a high CSF protein level indicate?
A high protein level in CSF can signal inflammation, infection (e.g., bacterial or viral meningitis), demyelinating diseases (e.g., multiple sclerosis), or bleeding into the spinal fluid. Your doctor will review your symptoms and other test results to determine the cause.
Is this test painful?
The procedure involves a small needle inserted into your lower back, which may cause temporary discomfort. Most people describe it as similar to a mild pinch or pressure. Local anesthesia is often used to minimize pain. Recovery is usually quick, with minimal downtime.
Can I drink fluids before the test?
Yes, you can drink fluids as usual unless your doctor advises otherwise. Staying hydrated helps ensure adequate CSF flow during the procedure. Avoid alcohol or caffeine before the test, as they may affect your blood pressure or discomfort levels.
  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