title: Giant atypical intraventricular meningioma presenting with visual loss in a child.
abstract: BACKGROUND
  Giant atypical intraventricular meningioma is very rare in childhood. Atypical meningiomas are characterised by an increased mitotic ratio and MIB-1 expression, and demonstrate more aggressive tumour behaviour compared with typical meningiomas.
  
  
  METHODS
  We present the case of an 11-year-old girl who presented to the eye clinic complaining of reduced vision, and was diagnosed with a giant atypical intraventricular meningioma.
  
  
  RESULTS
  Five years after surgical resection, there has been no recurrence of the tumour. Goldmann visual fields show a left incongruous homonymous hemianopia.
  
  
  CONCLUSIONS
  This case highlights the importance of ophthalmic examination in diagnosing brain tumours in children. Such a large tumour located in the lateral ventricle may cause obstructive hydrocephalus, compression of brain tissue, seizures and loss of vision, and is potentially fatal.
authors.affiliation: Department of Ophthalmology, Midwestern Regional Hospital Limerick, Dooradoyle, Limerick, Ireland. ucclearly@mac.com
authors.forename: C
authors.initials: C
authors.lastname: Cleary
authors.forename: D
authors.initials: D
authors.lastname: Curtin
mesh_terms: D001932:Brain Neoplasms / Q000098:blood supply / Q000175:diagnosis* / Q000601:surgery; D002533:Cerebral Angiography; D002648:Child; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008577:Meningeal Neoplasms / Q000098:blood supply / Q000175:diagnosis* / Q000601:surgery; D008579:Meningioma / Q000098:blood supply / Q000175:diagnosis* / Q000601:surgery; D014786:Vision Disorders / Q000209:etiology*; D014792:Visual Acuity