Skip to content

Cerebrospinal Fluid (CSF) Protein Content (Mass Concentration)

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

This test measures the total protein found in your cerebrospinal fluid, which cushions and protects your brain and spinal cord. Protein levels can help identify issues like inflammation, infections, or blood leaks into the CSF.

Quick summary

["Protein in your spinal fluid may signal underlying brain or nerve problems."]

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

Key facts at a glance

LOINC
109921-7
Short code
HAdV Ab Msmt CSF
Synonyms
HAdV 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

Why This Test Is Done

Your doctor may order this test if you have symptoms like severe headaches, neck stiffness, confusion, or neurological problems. It could also be part of a diagnostic workup for conditions such as meningitis, multiple sclerosis, or other spinal or brain disorders.

What to Expect Before the Test

You’ll lie on your side in a special position, and a doctor will insert a needle into your lower back to collect a small sample of CSF. This is usually done in a hospital or clinic setting and takes a few minutes. You may feel a slight pinch, but it’s generally not painful.

What the Results Mean

Normal protein levels in CSF are usually lower than in blood. Elevated levels might suggest inflammation, infection, or bleeding into the spinal fluid. Lower-than-normal levels could indicate certain genetic disorders or other rare conditions.

Common Conditions Linked to Abnormal Results

High protein levels may be linked to conditions like Guillain-Barré syndrome, subarachnoid hemorrhage, or certain types of brain tumors. Low protein levels might be associated with conditions like cerebral salt-wasting syndrome or specific genetic disorders.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

CSF Protein Level

Frequently asked questions

Will I need to prepare for this test?
No special preparation is needed. You can eat and drink normally before the test, but avoid heavy exercise or strenuous activity for a few hours beforehand.
How long will it take to get my results?
Results are typically available within a few days to a week, depending on your lab and healthcare provider. Your doctor will discuss them with you during your follow-up visit.
Can I drink alcohol before this test?
It’s best to avoid alcohol for 24 hours before the test, as it may affect your results or increase the risk of complications during the procedure.
  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