title: Paroxysmal alternating nystagmus.
abstract: Paroxysmal reversal of spontaneous nystagmus has rarely been described. Herein, we report recurrent bouts of vertigo and oscillopsia in association with reversed spontaneous nystagmus in a patient with prior surgical resection of the cerebellar vermis due to medulloblastoma and subsequent labyrinthine damage. The symptoms almost completely resolved with carbamazepine. The episodes may be ascribed to paroxysmal reversal of the vestibular asymmetry due to intermittent decompensation by the deficient cerebellum.
authors.affiliation: Department of Neurology, Ajou University School of Medicine, Suwon, Republic of Korea.
authors.forename: Seong-Joon
authors.initials: SJ
authors.lastname: Lee
authors.forename: Sung-Yeon
authors.initials: SY
authors.lastname: Sohn
authors.forename: Ji Soo
authors.initials: JS
authors.lastname: Kim
authors.forename: So Young
authors.initials: SY
authors.lastname: Moon
mesh_terms: D006801:Humans; D008297:Male; D009759:Nystagmus, Pathologic / Q000175:diagnosis / Q000188:drug therapy / Q000503:physiopathology*; D015835:Ocular Motility Disorders / Q000175:diagnosis / Q000188:drug therapy / Q000503:physiopathology*; D014717:Vertigo / Q000175:diagnosis / Q000188:drug therapy / Q000503:physiopathology*; D015837:Vestibular Diseases / Q000150:complications / Q000503:physiopathology*; D055815:Young Adult