Neurologia medico-chirurgica
Online ISSN : 1349-8029
Print ISSN : 0470-8105
ISSN-L : 0470-8105
Case Reports
Splitting of the Optic Nerve Associated With Ruptured Anterior Communicating Artery Aneurysm
—Case Report—
Sung-Pil JOOTae-Sun KIM
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JOURNAL OPEN ACCESS

2007 Volume 47 Issue 11 Pages 501-502

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Abstract
A 52-year-old man presented with an anterior communicating artery aneurysm associated with splitting, penetration, and visual symptoms of the optic nerve and manifesting as sudden onset of severe headache. Angiography disclosed a 10-mm anterior communicating artery aneurysm projecting supero-posteriorly, and operative findings revealed unexpected splitting of the optic nerve. Moreover, the optic nerve was not in direct contact with the aneurysm fundus. Splitting of the optic nerve without the presence of a penetrating aneurysm is extremely rare. The pathogenesis of optic nerve penetration may involve congenital fenestration of the optic nerve.
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© 2007 by The Japan Neurosurgical Society

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