Myelin Basic Protein (MBP) in Cerebrospinal Fluid (CSF)

Why Might This Test Be Ordered?

Your healthcare provider may order this test if you have symptoms like numbness, weakness, or vision changes that could suggest nerve damage or demyelination. It’s often used alongside other tests to evaluate conditions such as multiple sclerosis or other inflammatory or infectious processes in the central nervous system.

What Does a Positive Result Mean?

Elevated levels of myelin basic protein in CSF can indicate damage to the myelin sheath, which is the insulating layer around nerves. This may suggest conditions like multiple sclerosis, neuromyelitis optica, or other demyelinating diseases. However, results alone aren’t diagnostic and are usually interpreted alongside clinical findings and other tests.

Sample Collection and Preparation

This test requires a lumbar puncture (spinal tap), where a small amount of cerebrospinal fluid is collected from your lower back. The fluid is then analyzed in a lab to measure the concentration of myelin basic protein. The procedure is generally safe but may cause mild discomfort.

What to Expect Before the Test

On the day of the test, avoid caffeine, alcohol, or heavy meals to reduce the risk of dizziness. Wear comfortable clothing and bring any necessary medications with you. Inform your healthcare provider about any medications you’re taking, especially blood thinners, as they may affect the procedure.