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Do bilateral optic nerve sheath meningiomas exist?

T Lewis1, D Kingsley, I Moseley

  • 1Lysholm Radiological Department, National Hospital for Nervous Diseases, Queen Square, London, UK.

British Journal of Neurosurgery
|January 1, 1991
PubMed
Summary
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Bilateral optic nerve meningiomas in the orbits are distinct from unilateral tumors. These cases likely represent optic nerve involvement from retro-orbital meningiomas.

Area of Science:

  • Neurology
  • Neurosurgery
  • Ophthalmology

Background:

  • Meningiomas can affect the optic nerves.
  • Distinguishing bilateral optic nerve involvement is crucial for diagnosis and treatment.

Purpose of the Study:

  • To review patients with meningiomas involving both optic nerves within the orbits.
  • To differentiate the clinical and radiological features of bilateral optic nerve meningiomas from unilateral cases.

Main Methods:

  • Retrospective review of patients examined at The National Hospital for Nervous Diseases, Queen Square, between 1983 and 1987.
  • Analysis of radiological evidence, specifically X-ray computed tomography (CT) scans.
  • Comparison of clinical and CT features between bilateral and unilateral optic nerve tumors.

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Main Results:

  • Patients with bilateral optic nerve meningiomas exhibited distinct clinical and CT features compared to those with unilateral tumors.
  • The findings suggest that bilateral optic nerve involvement may represent a separate subgroup.

Conclusions:

  • Bilateral optic nerve meningiomas within the orbits appear to be a distinct clinical entity.
  • These tumors are likely secondary to primary retro-orbital meningiomas involving the optic nerves.