• World Neurosurg · May 2016

    Case Reports

    Splitting of the Optic Nerve by a Pituitary Macroadenoma.

    • Şahin Hanalioğlu, İlkay Işıkay, and Mustafa Berker.
    • Department of Neurosurgery, Hacettepe University Faculty of Medicine, Ankara, Turkey.
    • World Neurosurg. 2016 May 1; 89: 726.e11-4.

    BackgroundSplitting of the optic nerve by a pituitary adenoma is an extremely unusual condition with only 3 cases reported to date.Case DescriptionA 41-year-old woman presented with visual loss as a result of an aggressive pituitary macroadenoma causing the splitting of the right optic nerve. Possible mechanisms of this condition are discussed, and the literature is reviewed.ConclusionsIn aneurysm and tumor cases, awareness of the exact anatomy is particularly important to preserve function. An overlooked duplication or penetration of cranial nerves may result in inadvertent injury to important structures and loss of function.Copyright © 2016 Elsevier Inc. All rights reserved.

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