Cerebrospinal Fluid (CSF) Protein Profile (Electrophoresis)

This test measures specific substances, cells, or markers in your body that show how well certain organs and systems are working. Your results help your healthcare provider check your overall health, look for early signs of illness, and keep track of conditions you may already have been diagnosed with.

Electrophoresis separates proteins in your CSF into bands based on their size and electrical charge. Common proteins detected include albumin, immunoglobulins (like IgG), and other smaller proteins. Abnormal patterns may indicate inflammation, immune disorders, or structural issues in the central nervous system.

Your doctor may order this test if you have symptoms that need an explanation, if you have a health condition that requires regular monitoring, or as part of a routine checkup. It can also be used to screen for problems before symptoms appear, guide treatment decisions, or see how well a current treatment is working.

Your doctor may order this test if you have symptoms like headaches, vision changes, numbness, weakness, or neurological issues. It’s also used to monitor conditions like multiple sclerosis, meningitis, or brain tumors.

The sample is usually collected at a clinic, laboratory, or hospital. For a blood test, a trained professional cleans the site, ties a band around your upper arm, and draws a small amount of blood from a vein in your arm into a sterile tube. Some tests instead use a urine, saliva, or swab sample. The procedure is quick, and you can normally go home right afterward.

A small amount of CSF is collected through a procedure called a lumbar puncture (spinal tap). A needle is inserted into your lower back, and fluid is gently drawn into a vial for testing.

Results are usually described as normal (within the expected range) or abnormal (higher or lower than expected). A normal result generally suggests no evidence of the condition being tested for, while an abnormal result may point to an infection, inflammation, organ issue, or another problem that needs a closer look. Many factors, including medicines and recent meals, can affect values, so your provider will interpret your results together with your medical history and may order follow-up testing.

Normal results show balanced protein levels with distinct bands. Abnormal results may show elevated immunoglobulin bands (e.g., oligoclonal bands), high albumin, or unusual patterns that require further medical evaluation.