Oligoclonal Bands (IgG) by Serum Protein Electrophoresis
This test measures small clusters of antibodies (called oligoclonal bands) in your blood serum using electrophoresis, a technique that separates proteins based on size and charge.
["This test helps identify unusual antibody patterns that may signal certain neurological conditions."]
Key facts at a glance
- LOINC
- 57666-0
- Short code
- Oligoclonal Bands IgM SerPl Ql IEF
- Synonyms
- Oligoclonal Bands IgM SerPl Ql IEF
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- isoelectric-focusing
- CPT
- 82784
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why This Test Is Done
Doctors may order this test to investigate symptoms like unexplained weakness, numbness, memory issues, or other neurological problems. It can also be used in the evaluation of multiple sclerosis, neuromyelitis optica, or other autoimmune or inflammatory brain diseases.
What to Expect Before the Test
No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. The test involves a small needle, and you may feel a brief pinch. If you’re nervous, let your healthcare provider know.
What the Test Results Mean
Oligoclonal bands appear as distinct bands on an electrophoresis result. Their presence suggests the body is producing a unique set of antibodies, often linked to immune responses in the central nervous system. Results are interpreted by a medical professional based on your symptoms and medical history.
Common Conditions Linked to This Test
Positive findings are most commonly associated with multiple sclerosis, but they can also appear in other conditions like neuromyelitis optica, certain infections, or rare autoimmune diseases. False positives can occur, so results are always evaluated in context.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Oligoclonal bands are a key diagnostic marker for certain neurological disorders. They indicate an abnormal immune response in the brain or spinal cord, often linked to demyelination (loss of protective myelin sheaths) or inflammation. While not definitive on their own, they support a diagnosis when combined with clinical findings and other tests.
Short name
Oligoclonal IgG Bands
Frequently asked questions
What does it mean if my test shows oligoclonal bands?
Are there any risks or side effects from this blood test?
Can I eat or drink before this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy