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CSF myelin basic protein

Definition

CSF myelin basic protein is a test to measure the level of myelin basic protein (MBP) in the cerebrospinal fluid (CSF), the clear liquid that surrounds the brain and spinal cord.

MBP is found in the material that covers many of your nerves.

How the test is performed

A sample of spinal fluid is needed. For information on how this is done, see: Lumbar puncture

How the test will feel

For detailed information, see the article on lumbar puncture.

Why the test is performed

This test is done to see if myelin is breaking down. Multiple sclerosis is the most common cause for this, but other causes may include:

Normal Values

In general there should be less than 4 ng/mL of myelin basic protein in the CSF.

Note: ng/mL = nanogram per milliliter

Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.

The examples above show the common measurements for results for these tests. Some laboratories use different measurements or may test different specimens.

What abnormal results mean

Myelin basic protein levels between 4 and 8 ng/mL may be a sign of a chronic breakdown of myelin, or recovery from an acute episode of myelin breakdown.

If the myelin basic protein level is greater than 9 ng/mL, myelin is actively breaking down.

What the risks are

For information on the risks of spinal tap, see: Lumbar puncture and CSF collection.

References

Lublin FD, Miller AE. Multiple sclerosis and other inflammatory demyelinating diseases of the central nervous system. In: Bradley WG, Daroff RB, Fenichel GM, Jankovic J, eds. Bradley: Neurology in Clinical Practice. 5th ed. Philadelphia, Pa: Butterworth-Heinemann Elsevier; 2008:chap 58.


Review Date: 4/30/2011
Reviewed By: Kevin Sheth, MD, Department of Neurology, University of Maryland School of Medicine, Baltimore, MD. Review provided by VeriMed Healthcare Network. Also reviewed by David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine;David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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