Cerebrospinal Fluid (CSF) Protein Profile by Immunoassay (Qualitative)

Why This Test Is Done

Your doctor may order this test if you have symptoms like headaches, neck stiffness, confusion, or neurological problems. It can also be used to diagnose conditions such as meningitis, multiple sclerosis, or subarachnoid hemorrhage. Sometimes, it’s part of a broader evaluation for unexplained neurological symptoms or after a head injury.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your lumbar spine (lower back) to collect a small amount of CSF. The procedure is quick and usually painless, though you may feel a brief pinch. You’ll lie on your side with your knees bent, and the technician will guide the needle carefully. You may experience mild discomfort or a slight ache afterward.

What the Test Results Mean

The test identifies protein presence in the CSF, though it doesn’t provide specific protein breakdowns. Elevated protein levels can suggest inflammation, infection, or blood in the CSF. Low or normal levels may indicate no significant issue, but further testing is needed to confirm. Your doctor will interpret results in the context of your symptoms and medical history.

Common Conditions This Test Helps Diagnose

This test can help diagnose conditions like meningitis (infection in the brain/spinal cord), multiple sclerosis (a nerve disease), subarachnoid hemorrhage (bleeding in the brain’s protective space), or other neurological disorders. It may also be used to monitor treatment progress or rule out certain causes of neurological symptoms.