Case Report/Case SeriesExtensive Postradiation Ocular and Diffuse Cranial Neuromyotonia Mimicking Myasthenia GravisHardy, Todd A. MBBS, PhD*; Lee, Andrew W. MBBS, MPH†; Yiannikas, Con MBBS*; Chen, Celia S. MBBS, PhD‡; Reddel, Stephen W. MBBS, PhD*,§Author Information *Neuroimmunology Clinic, Concord Hospital §ANZAC Research Institute, University of Sydney, Sydney, NSW Departments of †Neurology ‡Ophthalmology, Flinders Medical Centre, Flinders University, Adelaide, SA, Australia The authors declare no conflict of interest. Written, informed consent to publish the case, including photographs and videos, was obtained from the patient’s next of kin. Reprints: Todd A. Hardy, MBBS, PhD, Department of Neurology, Neuroimmunology Clinic, Concord Repatriation General Hospital, Concord West, NSW 2139, Australia. E-mail: firstname.lastname@example.org. The Neurologist: September 2016 - Volume 21 - Issue 5 - p 79-82 doi: 10.1097/NRL.0000000000000088 Buy SDC Metrics Abstract Background: Ocular neuromyotonia is a rare, but well-recognized, complication of cranial irradiation. Case Report: Using figures and videos, we report a 52-year-old man with extensive ocular, brainstem, and lower cranial nerve neuromyotonia postradiation therapy for a fourth ventricle glioma who, in the context of an apparently positive edrophonium test, was initially misdiagnosed with myasthenia gravis. Conclusions: This is the first case of postirradiation neuromyotonia to be reported with such extensive cranial nerve and brainstem involvement. Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved.