title: Acute asymmetric upper nasal quandrantanopsia caused by a chiasmal colloid cyst in a patient with multiple sclerosis and bilateral retrobulbar neuritis.
abstract: OBJECTIVE
  To report a patient with multiple sclerosis and a history of sequential bilateral retrobulbar neuritis, who developed new onset of highly asymmetric upper quadrantanopsia.
  
  
  METHODS
  Interventional case report.
  
  
  METHODS
  A 36-year-old woman with multiple sclerosis and bilateral retrobulbar neuritis developed an acute asymmetric upper nasal quadrantanopsia.
  
  
  RESULTS
  Magnetic resonance imaging of the brain revealed a cyst that caused chiasmal compression and bilateral visual field defects.
  
  
  CONCLUSIONS
  New onset of bilateral visual field defects in a patient with diagnosed multiple sclerosis is likely to be caused by a new attack of the demyelinating disease. In this case, a newly diagnosed chiasmal colloid cyst was the cause of visual field defects.
authors.affiliation: Department of Ophthalmology, Kantonsspital Aarau, Aarau, Switzerland. killer@ksa.ch
authors.forename: H E
authors.initials: HE
authors.lastname: Killer
authors.forename: J
authors.initials: J
authors.lastname: Flammer
authors.forename: B
authors.initials: B
authors.lastname: Wicki
authors.forename: R H
authors.initials: RH
authors.lastname: Laeng
mesh_terms: D000208:Acute Disease; D000328:Adult; D003560:Cysts / Q000150:complications* / Q000175:diagnosis; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D009103:Multiple Sclerosis / Q000150:complications* / Q000175:diagnosis; D009897:Optic Chiasm / Q000473:pathology*; D009901:Optic Nerve Diseases / Q000150:complications* / Q000175:diagnosis; D009902:Optic Neuritis / Q000150:complications* / Q000175:diagnosis; D014786:Vision Disorders / Q000175:diagnosis / Q000209:etiology*; D014794:Visual Fields