title: Sequential bilateral hearing loss in multiple sclerosis.
abstract: OBJECTIVE
  We describe a case of multiple sclerosis presenting with sequential bilateral hearing loss.
  
  
  METHODS
  A 46-year-old woman underwent a series of audiological and neurologic evaluations for sequential bilateral hearing losses that occurred 6 months apart.
  
  
  RESULTS
  Initially, the patient suffered from sudden left hearing loss, and magnetic resonance imaging documented an enhancing lesion in the left middle cerebellar peduncle. Six months later, another episode of sudden vertigo, right hearing loss, and right facial palsy developed. Magnetic resonance imaging disclosed a new lesion in the right middle cerebellar peduncle.
  
  
  CONCLUSIONS
  Sequential bilateral hearing loss may be a manifestation of multiple sclerosis. In younger patients with sudden hearing loss, multiple sclerosis should be included in the differential diagnosis.
authors.affiliation: Department of Neurology, College of Medicine, Seoul National University, Seoul National University Bundang Hospital, Seongnam, Korea.
authors.forename: Young-Mi
authors.initials: YM
authors.lastname: Oh
authors.forename: Dong-Hoon
authors.initials: DH
authors.lastname: Oh
authors.forename: Seong-Hae
authors.initials: SH
authors.lastname: Jeong
authors.forename: Ja-Won
authors.initials: JW
authors.lastname: Koo
authors.forename: Ji Soo
authors.initials: JS
authors.lastname: Kim
mesh_terms: D005071:Evoked Potentials; D005158:Facial Paralysis / Q000209:etiology; D005260:Female; D006312:Hearing Loss, Bilateral / Q000209:etiology*; D003639:Hearing Loss, Sudden / Q000209:etiology; D006320:Hearing Tests; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D009103:Multiple Sclerosis / Q000150:complications / Q000175:diagnosis*; D009460:Neurologic Examination; D009759:Nystagmus, Pathologic / Q000209:etiology; D013681:Tegmentum Mesencephali / Q000473:pathology; D014717:Vertigo / Q000209:etiology