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Hashemi Eye Care - Neuroscience Institute and Research Center

Autoantibody Testing Panels

Blood tests that detect antibodies against the body's own tissues, used to diagnose autoimmune conditions affecting the eyes and nervous system.

3 min read

Autoantibody panels are blood tests that detect antibodies the immune system has mistakenly made against the body's own tissues. In neuro-ophthalmology, these tests help diagnose autoimmune conditions affecting the eyes, optic nerves, and brain.

Key Takeaways

  • Detect antibodies against self (autoantibodies)
  • Help diagnose autoimmune conditions
  • Different panels for different conditions
  • Negative results don't always rule out autoimmune disease
  • Interpretation requires clinical context

Commonly Ordered Panels

Neuromyelitis Optica (NMO) Panel

For suspected NMO:

Aquaporin-4 (AQP4/NMO-IgG) antibodies

  • Highly specific for NMO
  • Positive in ~75% of NMO patients
  • Can be positive before clinical criteria met

MOG antibodies

  • Associated with MOGAD
  • Different treatment implications than AQP4+

Myasthenia Gravis Panel

For suspected myasthenia gravis:

Paraneoplastic Panel

For suspected cancer-associated visual syndromes:

Common antibodies:

  • Anti-recoverin (CAR)
  • Anti-enolase
  • Anti-CRMP-5 (CV2)
  • Anti-Hu
  • Anti-Yo
  • Anti-amphiphysin

Vasculitis/Inflammatory Panel

For systemic inflammation:

  • ANA (antinuclear antibody)
  • ANCA (anti-neutrophil cytoplasmic antibodies)
  • Anti-dsDNA
  • Complement levels (C3, C4)

For specific conditions:

When Panels Are Ordered

Optic Neuritis

  • NMO/MOG panel if atypical features
  • ANA if lupus suspected
  • MRI findings guide testing

Unexplained Vision Loss

  • Paraneoplastic panel
  • NMO panel
  • Inflammatory markers

Muscle Weakness with Eye Findings

  • Myasthenia panel
  • Thyroid antibodies

Orbital Inflammation

  • Thyroid antibodies (Graves' disease)
  • ANA, ANCA
  • IgG4 levels

Understanding Results

Positive Results

  • Support but don't prove diagnosis
  • Must correlate with clinical picture
  • Some antibodies highly specific (AQP4, AChR)
  • Others less specific (ANA)

Negative Results

  • Don't always rule out disease
  • Sensitivity varies by antibody
  • Test at specialized labs when possible
  • May need to repeat if clinical suspicion high

False Positives

  • Can occur, especially with less specific tests
  • Low-titer ANA common in healthy people
  • Clinical correlation essential

Test Considerations

Sample Handling

  • Some antibodies require specific handling
  • Cell-based assays more sensitive than ELISA for some
  • Specialized laboratories may be needed

Cost

  • Panels can be expensive
  • Insurance coverage varies
  • Order targeted tests when diagnosis likely

Timing

  • Results may take 1-3 weeks
  • Rush testing sometimes available
  • Don't delay treatment while waiting if urgent

Common Scenarios

Atypical Optic Neuritis

Order:

  • AQP4 antibody
  • MOG antibody
  • Consider ANA, B12, other tests

Ptosis and Diplopia

Order:

  • AChR antibody
  • Anti-MuSK antibody
  • Thyroid panel

Unexplained Retinopathy

Order:

  • Paraneoplastic panel
  • Consider cancer workup if positive
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