title: Ipsilateral beating nystagmus after acoustic schwannoma resection.
abstract: OBJECTIVE
  To highlight the alert value of an ipsilateral beating nystagmus to detect any potential vascular complication in the early postoperative course of acoustic schwannoma (AS) surgery.
  
  
  METHODS
  In a series of 432 cases of AS operated by the same surgeons between January 1991 and December 2000, two cases of vascular complications were detected by an ipsilateral beating nystagmus toward the operated side.
  
  
  RESULTS
  One case of arterial infarction giving rise to a partial AICA syndrome and one case of hematoma of the cerebello-pontine angle (CPA) were revealed by an ipsilateral beating nystagmus. It was the first or the only objective neurologic sign encountered in the early postoperative course of AS surgery.
  
  
  CONCLUSIONS
  An ipsilateral beating nystagmus after AS resection, even appearing as the only abnormal objective neurologic finding, should always raise suspicion of a brain stem event. Early extubation is recommended for systematic neurologic assessment in order to detect as quickly as possible any potential vascular complication in the early postoperative course of AS.
authors.affiliation: Department of Oto-Rhino-Laryngology, Head and Neck Surgery, Hôpital Lariboisière, 2 rue Ambroise Paré, 75475 Paris, France.
authors.forename: Romain E
authors.initials: RE
authors.lastname: Kania
authors.forename: Philippe
authors.initials: P
authors.lastname: Herman
authors.forename: Guillaume
authors.initials: G
authors.lastname: Lot
authors.forename: Patrice Tran Ba
authors.initials: PT
authors.lastname: Huy
mesh_terms: D000328:Adult; D002545:Brain Ischemia / Q000175:diagnosis / Q000209:etiology; D016543:Central Nervous System Neoplasms / Q000601:surgery*; D002530:Cerebellopontine Angle; D002531:Cerebellum / Q000098:blood supply; D005260:Female; D006406:Hematoma / Q000175:diagnosis / Q000209:etiology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009464:Neuroma, Acoustic / Q000601:surgery*; D009759:Nystagmus, Pathologic / Q000209:etiology* / Q000503:physiopathology; D013506:Otologic Surgical Procedures / Q000009:adverse effects*; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D014652:Vascular Diseases / Q000175:diagnosis* / Q000209:etiology