Ocular Neuromyotonia 23 Years after Stereotactic Radiosurgery

Ocular neuromyotonia is a relatively rare clinical entity resulting in spasm of extraocular muscles. The pathophysiology may be related to spontaneous firing of axons, and it has been associated with compressive lesions or previous radiation to the sellar region. Stereotactic radiosurgery is a relatively modern form of radiation therapy, and fewer cases have been described as a consequence.1 We found the longest duration between radiation treatment of any kind and the onset of neuromyotonia previously reported was 18 years.