Abducens nerve ocular neuromyotonia following non-sellar or parasellar tumors.
Ocular neuromyotonia is an uncommon disorder resulting from episodic involuntary discharge of ocular motor nerves producing sustained contraction of their respective ocular muscles. Ocular neuromyotonia manifests in brief spells of diplopia occurring spontaneously or after eccentric gaze holding. In most cases, ocular neuromyotonia follows months or years after radiotherapy to the sellar and parasellar region and involves the oculomotor nerve. We report two unusual cases of abducens nerve ocular neuromyotonia that followed radiation therapy of tumors in areas other than the sellar or parasellar region.
Ela-Dalman
Noa
N
Department of Ophthalmology, Jules Stein Eye Institute, UCLA, Los Angeles, CA 90095, USA.
Arnold
Anthony C
AC
Chang
Louis K
LK
Velez
Federico G
FG
Lasky
Joseph L
JL
D000010:Abducens Nerve; D000293:Adolescent; D000328:Adult; D002528:Cerebellar Neoplasms / Q000532:radiotherapy*; D004172:Diplopia / Q000209:etiology; D005260:Female; D006801:Humans; D020386:Isaacs Syndrome / Q000209:etiology*; D009801:Oculomotor Muscles; D015840:Oculomotor Nerve Diseases / Q000209:etiology*; D011832:Radiation Injuries / Q000150:complications*; D012658:Sella Turcica; D019292:Skull Base Neoplasms / Q000532:radiotherapy*