Cerebrospinal Fluid (CSF) Protein Content (Mass Concentration)
This test measures the total protein found in your cerebrospinal fluid (the fluid surrounding your brain and spinal cord). It helps assess conditions affecting the brain’s protective barrier or blood-brain barrier.
["Protein levels in CSF can signal inflammation, infection, or structural issues in the central nervous system."]
Key facts at a glance
- LOINC
- 6508-6
- Short code
- N men Ag CSF Ql
- Synonyms
- N men Ag CSF Ql
- 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 Matters
Elevated CSF protein levels may indicate conditions like meningitis, multiple sclerosis, or tumors. Low levels could suggest bleeding or other rare disorders. Your doctor will use this result alongside other tests to guide diagnosis.
What to Expect During the Test
A small amount of CSF is collected via a procedure called a lumbar puncture (spinal tap). You’ll lie on your side, and a needle is inserted into your lower back. The process is quick but may cause mild discomfort. The sample is then sent to the lab for analysis.
Common Conditions Affecting Results
High protein levels might be seen in infections (e.g., bacterial or viral meningitis), autoimmune diseases (e.g., Guillain-Barré syndrome), or tumors. Low levels could occur with subarachnoid hemorrhage or certain genetic disorders. Your doctor will review symptoms and other test results for context.
Preparation Tips
No special preparation is needed, but avoid heavy lifting or strenuous activity for 24 hours before the test. Hydration is encouraged, but inform your doctor if you’re on blood thinners or have a history of bleeding disorders.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
CSF protein testing is critical for diagnosing neurological disorders. It helps distinguish between infections, inflammatory diseases, and structural abnormalities. For example, elevated protein with high white blood cells often points to meningitis, while abnormal patterns may suggest demyelinating diseases like multiple sclerosis.
Short name
CSF Protein Level
Frequently asked questions
How long will it take to get results?
What does a ‘normal’ result mean?
Can I eat or drink before the test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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