Cerebrospinal Fluid Protein by Bromocresol Green (CSF Protein, Bromocresol Green Method)

Why This Test Might Be Ordered

Your doctor may recommend this test if you have symptoms like headaches, neck stiffness, vision changes, or neurological issues that could involve the brain or spinal fluid. It’s also sometimes used to monitor conditions like multiple sclerosis, meningitis, or brain tumors.

What to Expect Before the Test

You’ll likely have a lumbar puncture (spinal tap) where a small needle is inserted into your lower back to collect CSF. The procedure is quick but may cause mild discomfort. No special preparation is needed, but inform your doctor about any medications or allergies.

What the Results Mean

Protein levels in normal CSF are usually low. Elevated protein could indicate inflammation, infection, or a breakdown of the blood-brain barrier. Very high levels might suggest conditions like multiple sclerosis or certain brain tumors. Low protein could be normal or related to other rare conditions.

Common Conditions Affecting Results

High protein levels in CSF are often seen in autoimmune diseases (e.g., multiple sclerosis), infections (e.g., meningitis), or tumors. Low protein might be seen in conditions like cerebral edema or certain genetic disorders, though this is less common.