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Myelin Basic Protein (MBP) in Serum

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

This test measures the presence of myelin basic protein, a protein found in the myelin sheath that surrounds nerve fibers. It may be used to help diagnose or monitor conditions affecting the central nervous system.

Quick summary

["This test helps assess nerve damage or demyelination in the brain or spinal cord."]

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

Key facts at a glance

LOINC
110170-8
Short code
Myelin IgG Msmt Ser
Synonyms
Myelin IgG Msmt Ser
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
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 Might This Test Be Ordered?

Your healthcare provider may recommend this test if you have symptoms like numbness, weakness, or vision changes that could suggest a condition like multiple sclerosis (MS) or other neurological disorders. It may also be used to monitor disease progression or response to treatment in certain cases.

What Does the Test Involve?

A blood sample is drawn from a vein, typically in your arm. The blood is then processed to separate the serum, which is sent to a lab for testing. The lab analyzes the serum for the presence of myelin basic protein using immunoassay techniques.

What Are Common Conditions Monitored?

Myelin basic protein is primarily associated with conditions affecting the myelin sheath, such as multiple sclerosis, acute disseminated encephalomyelitis (ADEM), or other demyelinating diseases. It can help confirm or support a diagnosis when combined with clinical findings and imaging.

What to Expect Before the Test

No special preparation is usually needed. You may be asked to fast for 8–12 hours before the test if instructed by your provider, but this is not always required for this specific test. Wear comfortable clothing and plan to rest for a short time after the blood draw.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Role in Diagnosis and Monitoring

Short name

Myelin Basic Protein (Serum)

Frequently asked questions

Is this test always positive in neurological disorders?
No, this test is not definitive on its own. Elevated levels of myelin basic protein can indicate active demyelination, but results are often interpreted alongside other tests, symptoms, and imaging studies (such as MRI) to form a comprehensive diagnosis. False positives or negatives may occur, so results should be reviewed by a healthcare provider.
Can this test be used to diagnose multiple sclerosis?
While elevated myelin basic protein can suggest demyelinating activity, it is not the sole criterion for diagnosing multiple sclerosis. Multiple sclerosis is typically diagnosed using a combination of clinical symptoms, imaging studies, cerebrospinal fluid analysis, and other tests. This test may help support a diagnosis or guide treatment decisions in certain cases.
What if my test results are abnormal?
If your results are abnormal, your healthcare provider will discuss them with you in detail. They may recommend further testing, adjustments to your treatment plan, or additional evaluations to understand the cause of your symptoms or condition better. Follow-up care is tailored to your specific situation.
  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