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Ethambutol-induced optic neuropathy.

Martin Kyncl1, Martin Fus1, Jan Lestak1

  • 1Faculty of Biomedical Engineering, Czech Technical University in Prague, 272 01 Kladno.

Biomedical Papers of the Medical Faculty of the University Palacky, Olomouc, Czechoslovakia
|May 18, 2022
PubMed
Summary
This summary is machine-generated.

Ethambutol treatment for tuberculosis can cause ethambutol-induced optic neuropathy (EON), leading to vision loss. This case highlights the progressive and potentially irreversible nature of EON, even after drug discontinuation.

Keywords:
ethambutolmagnetic resonance imagingoptic neuropathyvessel density

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Area of Science:

  • Ophthalmology
  • Neurology
  • Pharmacology

Background:

  • Ethambutol is a first-line antitubercular drug.
  • Optic neuropathy is a known but often overlooked side effect of ethambutol.

Observation:

  • A 40-year-old patient developed sudden, painless vision decline within six months of ethambutol treatment.
  • Despite discontinuation, visual field deficits and retinal nerve fiber layer thinning persisted.

Findings:

  • Electrophysiological and Optical Coherence Tomography (OCT) revealed significant optic nerve damage and progressive retinal ganglion cell loss.
  • Magnetic Resonance Imaging (MRI) confirmed alterations in the peripheral visual pathway.

Implications:

  • Ethambutol-induced optic neuropathy (EON) can have a severe, irreversible course.
  • Early recognition and monitoring are crucial for managing EON in patients on ethambutol therapy.