passages.id: 4395
passages.type: title
passages.text: Optochiasmatic and peripheral neuropathy due to ethambutol overtreatment.
passages.id: 4396
passages.type: abstract
passages.text: Ethambutol is known to cause optic neuropathy and, more rarely, axonal polyneuropathy. We characterize the clinical, neurophysiological, and neuroimaging findings in a 72-year-old man who developed visual loss and paresthesias after 11 weeks of exposure to a supratherapeutic dose of ethambutol. This case demonstrates the selective vulnerability of the anterior visual pathways and peripheral nerves to ethambutol toxicity.