A Giant Tumefactive Virshow-Robin Space: A Rare Cause of a Homonymous Quadrantanopia.

A 53-year-old woman was found to have a left inferior homonymous quadrantanopia. Brain MRI disclosed a giant Virchow-Robin space compressing the right optic tract. After fenestration of this cystic lesion, most of the visual field loss resolved. Giant Virchow-Robin spaces may cause homonymous field defects which, with appropriate management, may improve. (C) 2017 by North American Neuro-Ophthalmology Society

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