Abducens ocular neuromyotonia as a delayed complication of oropharyngeal carcinoma treated with radiation

作者：Sychev Yevgeniy V; McInnis Colin P; Francis Courtney E^*

来源：Head and Neck-Journal for the Sciences and Specialties of the Head and Neck, 2016, 38(S1): E2428-E2431.

DOI：10.1002/hed.24370

• ocular neuromyotonia
• abducens nerve
• oropharyngeal carcinoma
• radiotherapy complications
• oropharynx

Background. Ocular neuromyotonia (ONM) is a disorder characterized by periodic involuntary extraocular muscle contraction that occurs almost exclusively in the setting of prior radiation to the sella or skull base. We present the first case of abducens neuromyotonia associated with oropharyngeal carcinoma.
Methods and Results. We report a case of a 63-year-old patient with abducens ONM occurring 16 years after radiation treatment for oropharyngeal squamous cell carcinoma. A literature review was performed using Medline and PubMed databases to search for all documented cases of abducens neuromyotonia. Our review found 20 cases of abducens neuromyotonia but none after radiotherapy (RT) to the oropharynx.
Conclusion. Abducens ONM can occur because of disease at anatomic locations remote from the course of the sixth cranial nerve, most likely because of the irradiated area exceeding the intended field. Our case also supports the fact that RT can significantly precede symptom onset.

• 出版日期2016-4