Ethambutol optic neuropathy associated with enhancement at the optic chiasm
نویسندگان
چکیده
منابع مشابه
Ethambutol-associated optic neuropathy.
INTRODUCTION Ethambutol is used in the treatment of tuberculosis, which is still prevalent in Southeast Asia, and can be associated with permanent visual loss. We report 3 cases which presented with bitemporal hemianopia. CLINICAL PICTURE Three patients with ethambutol-associated toxic optic neuropathy are described. All 3 patients had loss of central visual acuity, colour vision (Ishihara) a...
متن کاملThe rare ethambutol-induced optic neuropathy
RATIONALE Ethambutol-induced optic neuropathy (EON) is a well-known complication that results from the use of ethambutol. The ocular manifestations of EON include painless loss of central vision and cecocentral scotomas in the visual field. PATIENT CONCERNS A 75-year-old Chinese Han man suffered from this rare ocular disorder because he took ethambutol for about 8 months. DIAGNOSES He was d...
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The mammalian optic chiasm is widely and properly regarded as a region where axons from the temporal retina take an uncrossed course and separate from axons arising in the nasal retina that take a crossed course. However, this is but a rough approximation of the adult situation, and developmental studies must take account of several distinctive stages and axon rearrangements that characterize t...
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Eight verified lesions of the optic chiasm were examined on 0.5 T magnetic resonance (MR) and GE 9800, 8800 computed tomographic (CT) scanners. Enlargement of the optic chiasm was demonstrated in all cases. There was some change of MR signal compared with brain in all but one case, which had no resemblance to contrast enhancement on CT scans. The signal was specific for hematoma in one case. Ab...
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ژورنال
عنوان ژورنال: Canadian Journal of Ophthalmology
سال: 2017
ISSN: 0008-4182
DOI: 10.1016/j.jcjo.2017.03.001