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Published on: February 15, 2022
[Ocular neuromyotonia after radiation therapy].
M van Waveren1, V Herzau, D Besch
1Sektion für Motilitätsstörungen, periokuläre Chirurgie und Kinderophthalmologie, Universitäts-Augenklinik, Tübingen, Deutschland.
Summary
Ocular neuromyotonia, a rare condition often seen after radiation therapy, can cause temporary double vision. This case highlights abducens nerve issues and exotropia, with carbamazepine showing symptom relief.
Area of Science:
- Ophthalmology
- Neurology
- Oncology
Background:
- Ocular neuromyotonia is a rare disorder typically diagnosed in patients undergoing radiation therapy.
- Diplopia (double vision) is a common symptom reported in literature for affected individuals.
Observation:
- A patient developed right abducens paresis and sporadic exotropia six months post-radiation for epipharynx carcinoma.
- Prolonged rightward gaze triggered a right-sided adduction deficit, resulting in primary position exotropia and leftward gaze issues.
Findings:
- The patient's symptoms of ocular neuromyotonia, including abducens paresis and exotropia, were observed.
- Carbamazepine treatment led to a reduction in the patient's symptoms.
Implications:
- This case expands the understanding of ocular neuromyotonia presentation following radiation therapy.
- It suggests carbamazepine as a potential therapeutic option for managing symptoms of radiation-induced ocular neuromyotonia.
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