title: Familial posterior fossa arachnoid cyst.
abstract: BACKGROUND
  Arachnoid cysts are a relatively common incidental finding on CT scans of the brain. They most commonly occur in the middle cranial fossa, where familial occurrence has rarely been reported. Posterior fossa arachnoid cysts are more unusual.
  
  
  METHODS
  We report the presence of quadrigeminal cistern arachnoid cysts in siblings.
authors.affiliation: Department of Neurosurgery, Institute of Neurosciences, Southern General Hospital, Govan Road, Glasgow, UK. scotslion@yahoo.com
authors.forename: Saurabh
authors.initials: S
authors.lastname: Sinha
authors.forename: Jennifer I M
authors.initials: JI
authors.lastname: Brown
mesh_terms: D016080:Arachnoid Cysts / Q000150:complications / Q000473:pathology* / Q000601:surgery; D002675:Child, Preschool; D003388:Cranial Fossa, Posterior; D005192:Family Health; D005260:Female; D006801:Humans; D006849:Hydrocephalus / Q000209:etiology / Q000473:pathology / Q000601:surgery; D007223:Infant; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D009460:Neurologic Examination / Q000379:methods; D019292:Skull Base Neoplasms / Q000150:complications / Q000473:pathology*; D014057:Tomography, X-Ray Computed / Q000379:methods; D017287:Ventriculoperitoneal Shunt / Q000379:methods