title: Traumatic vertebral artery dissection presenting with incomplete congruous homonymous quadrantanopia.
abstract: BACKGROUND
  To describe a rare presentation of vertebral artery dissection (VAD) as a small but congruous incomplete homonymous hemianopia demonstrating use of visual field testing in the diagnosis.
  
  
  METHODS
  A 30 year old woman had been unwell for 4 months with difficulty focusing, vertigo, dizziness and a feeling of falling to the right. A small but congruous right inferior homonymous quadrantanopia was found on examination leading to further investigation that uncovered a vertebral artery dissection and multiple posterior circulation infarctions including a left occipital stroke matching the field defect.
  
  
  CONCLUSIONS
  We describe an atypical case of VAD presenting with a small congruous quadrantanopia. This is a rare but significant condition that predisposes to multiple thromboembolic infarction that may be easily misdiagnosed and a high index of suspicion is required to make the diagnosis.
authors.affiliation: Department of Ophthalmology, Flinders Medical Centre, Flinders University, Flinders Drive, Bedford Park, Adelaide SA 5042, Australia.
authors.forename: Albert I
authors.initials: AI
authors.lastname: Matti
authors.forename: Andrew W
authors.initials: AW
authors.lastname: Lee
authors.forename: Celia S
authors.initials: CS
authors.lastname: Chen
mesh_terms: D000328:Adult; D000792:Angiography; D002544:Cerebral Infarction / Q000175:diagnosis / Q000209:etiology; D005260:Female; D006423:Hemianopsia / Q000175:diagnosis / Q000209:etiology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D020521:Stroke / Q000209:etiology; D014057:Tomography, X-Ray Computed; D020217:Vertebral Artery Dissection / Q000150:complications* / Q000000981:diagnostic imaging; D058609:Visual Field Tests; D014794:Visual Fields