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**Overview**: Oligoclonal Bands IgG Panel**Introduction**: The Oligoclonal Bands IgG Panel is a diagnostic tool designed to screen for multiple sclerosis using paired CSF and serum samples. In India, multiple sclerosis prevalence is ~7-30 per 100,000 (higher in northern regions), with oligoclonal bands (OCB) in CSF (not serum) present in ~90 percent of cases, supporting diagnosis per McDonald criteria. High morbidity from under-testing in rural/low-SES patients with subacute neurological deficits (optic neuritis, myelitis), limited CSF analysis labs, delayed disease-modifying therapy (interferon, fingolimod) leading to disability progression. Per neurology practices aligned with ICMR and Indian Academy of Neurology guidelines, the test employs electrophoresis for CSF IgG, serum IgG, oligoclonal bands, and IgG index over 1-2 days with high specificity, valuable for intrathecal IgG synthesis confirmation. This diagnostic falls under autoimmune screening and targets patients with suspected MS or demyelinating disease, addressing accurate detection to guide early DMT and monitoring. With elevated morbidity due to underdiagnosis, the test supports public health efforts by enabling precise MS diagnosis and reducing disability burden. Its paired CSF/serum-based approach ensures reliable OCB detection.**Other Names**: Oligo Bands Pnl.**FDA Status**: FDA approved, CLIA certified for immunology, compliant with 2025 standards.**Historical Milestone**: OCB electrophoresis standard for MS; in India, used in neurology centers.**Purpose**: The test assesses 4 parameters including CSF IgG to guide MS screening, detect intrathecal synthesis, inform DMT.**Test Parameters**: 1. CSF IgG, 2. Serum IgG, 3. Oligoclonal Bands, 4. IgG Index.**Pretest Condition**: No fasting required; patients should have neurological symptoms.**Specimen**: 1 mL CSF + 3 mL serum in 1 SST, transported within specified times to maintain sample viability.**Sample Stability at Room Temperature**: CSF: 24 hours, Serum: 8 hours with proper handling to preserve analyte integrity, ensuring reliable test performance.**Sample Stability at Refrigeration**: CSF: 7 days, Serum: 7 days at 2-8 degrees Celsius, suitable for short-term storage before laboratory processing, though immediate testing is preferred.**Sample Stability at Frozen**: CSF: 6 months, Serum: 6 months at -20 degrees Celsius, allowing long-term storage for retesting, though freezing may affect some analytes.**Medical History**: Patients should provide details on neurological symptoms, MRI findings.**Consent**: Written informed consent is required, detailing the test's purpose, potential risks of undetected MS including disability, benefits of screening, and minimal discomfort from lumbar puncture/venipuncture.**Procedural Considerations**: The test involves paired CSF/serum electrophoresis by trained personnel to ensure sterile technique, avoid artifacts, and interpret OCB within 1-2 days using provided controls. Laboratories must maintain a controlled environment, adhere to quality assurance protocols.**Factors Affecting Result Accuracy**: Delays beyond stability periods, improper storage conditions, hemolysis, or blood contamination in CSF can affect results. Correlation with clinical evaluation or additional testing is recommended to confirm findings.**Clinical Significance**: CSF-specific OCB indicates intrathecal synthesis, supporting MS diagnosis, necessitating specialist input.**Specialist Consultation**: Neurologists should be consulted for management.**Additional Supporting Tests**: MRI brain/spine, evoked potentials for confirmation.**Test Limitations**: OCB not specific; comprehensive approach required.**References**: Indian Journal of Neurology 2024, MS Studies India 2023. |
