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Chronic relapsing inflammatory optic neuropathy (CRION).

D Kidd1, B Burton, G T Plant

  • 1Neuro-ophthalmology Department, National Hospital for Neurology and Neurosurgery, London, UK.

Brain : a Journal of Neurology
|January 23, 2003
PubMed
Summary
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Chronic relapsing inflammatory optic neuropathy (CRION) is a distinct condition characterized by recurrent, painful vision loss. While mimicking other optic neuropathies, CRION lacks systemic involvement, necessitating specific diagnostic and management strategies.

Area of Science:

  • Ophthalmology
  • Neurology
  • Immunology

Background:

  • Inflammatory optic neuropathies present a diagnostic challenge, often overlapping with systemic autoimmune or granulomatous diseases.
  • Accurate diagnosis is crucial for appropriate treatment and preventing vision loss.

Observation:

  • A specific form of inflammatory optic neuropathy was observed, frequently bilateral and painful, with relapsing-remitting episodes.
  • Brain MRI scans were consistently normal, while optic nerve imaging often revealed high signal abnormalities with enhancement.

Findings:

  • The observed syndrome responded well to corticosteroid therapy, but often required long-term immunosuppression.
  • Despite clinical similarities to granulomatous optic neuropathy, no evidence of systemic sarcoidosis was found in patients during an 8-year median follow-up.

Related Experiment Videos

  • The study proposes the designation 'chronic relapsing inflammatory optic neuropathy' (CRION) for this distinct clinical entity.

    • Implications:

    • CRION represents a unique neuro-ophthalmic disorder requiring specific diagnostic criteria and treatment protocols.
    • Distinguishing CRION from other optic neuropathies is essential to avoid unnecessary systemic investigations and treatments.
    • Further research into the pathogenesis and optimal long-term management of CRION is warranted.