Katsumi Kurokawa    Department   Kawasaki Medical School  Kawasaki Medical School, Department of General Internal Medicine 1,    Position   Professor
Article types	症例報告
Language	English
Peer review	Peer reviewed
Title	Pseudo-internuclear ophthalmoplegia as a sign of overlapping myasthenia gravis in a patient with 'intractable' hypothyroidism.
Journal	Formal name：Internal medicine Abbreviation：Intern Med ISSN code：09182918/13497235
Volume, Issue, Page	49(1),pp.69-72
Author and coauthor	Yamazaki Yuu, Sugiura Tomohito, Kurokawa Katsumi
Authorship	Last author
Publication date	2010/01
Summary	We describe a 52-year-old man with a history of increasing fatigability and gait disturbances that were first attributed to hypothyroidism. On examination, he had bilateral pseudo-internuclear ophthalmoplegia with weakness of adduction and abducting nystagmus. Convergence was also impaired and he showed proximal weakness of the limb. Intravenous edrophonium almost completely abolished the nystagmus and adducting muscle weakness, and improved the strength of proximal muscles groups. The clinical response to the administration of edrophonium, the presence of AChR binding antibodes and the repetitive nerve stimulation test findings indicated that the patient had pseudo-internuclear ophthalmoplegia as a manifestation of generalized myasthenia gravis. Whereas hypothyroidism was effectively controlled with levothyroxine, his subsequent response to thymectomy, prednisolone and cholinesterase inhibitors confirmed the diagnosis of generalized myasthenia gravis.