Skip Navigation LinksHome > June 2014 - Volume 34 - Issue 2 > Optic Chiasm Involvement on MRI With Ethambutol-Induced Bite...
Journal of Neuro-Ophthalmology:
doi: 10.1097/WNO.0000000000000095
Clinical Observation

Optic Chiasm Involvement on MRI With Ethambutol-Induced Bitemporal Hemianopia

Osaguona, Vivian B. BSc, MBCHB, FWACS; Sharpe, James A. MD, FRCPC; Awaji, Samira A. MD; Farb, Richard I. MD, FRCPC; Sundaram, Arun N.E. MD, MSc, FRCPC

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Abstract

While ethambutol optic neuropathy usually causes central or cecocentral scotomas, bitemporal visual field defects also have been reported. The pathogenesis of the bitemporal hemianopia has not been established. This article describes magnetic resonance imaging abnormalities involving the optic chiasm in a patient with bitemporal visual field loss. To our knowledge, these neuroimaging findings have not been previously described in association with ethambutol therapy.

Copyright © 2014 by North American Neuro-Ophthalmology Society

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