Cerebrospinal Fluid (CSF) Protein by Turbidimetry
This test measures the total protein content 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 potential neurological issues."]
Key facts at a glance
- LOINC
- 14523-5
- Short code
- RUBV Ag CSF Ql IF
- Synonyms
- RUBV Ag CSF Ql IF
- Category
- chemistry
- Sample
- csf
- Container
- Sterile tube
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- if
- Specimen volume
- 1-2 mL
- Stability
- Immediate analysis required, Refrigerated: 1h
- Hemolysis max
- 200
- TAT
- 4–24 hours
- Order
- routine
Why Is This Test Done?
Your healthcare provider may order this test to investigate symptoms like headaches, seizures, vision changes, or neurological problems. It’s also used to diagnose conditions such as infections, tumors, multiple sclerosis, or inflammatory diseases of the central nervous system.
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 quick but may cause mild discomfort. No special preparation is usually needed, but inform your doctor about any medications you’re taking.
What the Results Mean
CSF protein levels can vary based on health conditions. Elevated levels may indicate inflammation, infection, or blood leakage into the CSF. Lower levels might suggest certain genetic disorders or other neurological conditions. Your results will be interpreted by a healthcare provider in the context of your symptoms and medical history.
Common Conditions Influencing Results
Conditions like meningitis, encephalitis, multiple sclerosis, or brain tumors can raise CSF protein levels. Conversely, conditions such as certain genetic disorders or low protein synthesis may lead to lower levels. Always discuss your results with your doctor.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Elevated CSF protein levels often point to increased permeability of the blood-brain barrier or protein leakage from blood into the CSF. This can occur in infections (e.g., bacterial or viral meningitis), autoimmune diseases (e.g., multiple sclerosis), or neoplastic processes (e.g., brain tumors). Low protein levels may suggest conditions like congenital disorders of protein metabolism or certain metabolic syndromes. Early identification of these changes can guide treatment decisions.
Short name
CSF Protein
Frequently asked questions
What does a normal CSF protein level feel like?
How often should I get this test?
Can lifestyle changes affect CSF protein levels?
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