Cerebrospinal Fluid Protein Electrophoresis (Qualitative)

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms like headaches, vision changes, numbness, weakness, or balance issues. It’s also used to monitor conditions such as multiple sclerosis, meningitis, or other neurological diseases. Sometimes, it’s performed during diagnostic procedures like lumbar punctures.

How the Test Is Performed

A small amount of CSF is collected through a procedure called a lumbar puncture (spinal tap). The fluid is then analyzed using electrophoresis, a technique that separates proteins based on size and charge. The results are typically qualitative, meaning they describe the presence or pattern of protein bands rather than specific numeric values.

What the Results Mean

The test identifies patterns of protein bands, which can reveal abnormalities such as increased amounts of immunoglobulin (Ig) bands (often seen in multiple sclerosis) or other protein patterns linked to infections, tumors, or inflammatory diseases. Your healthcare provider will interpret these results in the context of your symptoms and medical history.

Possible Conditions

Abnormal results may suggest conditions like multiple sclerosis, Guillain-Barré syndrome, infections (e.g., bacterial or viral meningitis), subacute combined degeneration, or other neurological disorders. Normal results do not definitively rule out all conditions but may indicate no obvious protein abnormalities in the CSF.