title: Arachnoid cysts with orbital bone remodeling--two interesting cases.
abstract: OBJECTIVE
  To describe two cases of arachnoid cyst that altered the bony orbit.
  
  
  METHODS
  Case report.
  
  
  RESULTS
  Cases of unilateral arachnoid cyst are described in two men, both over the age of 60. The patients were evaluated with computed tomography (CT) scans and in each, an arachnoid cyst in the middle cranial fossa caused bone remodeling with exophthalmos in one. These patients were followed clinically and radiographically over a number of years with no change.
  
  
  CONCLUSIONS
  Arachnoid cysts in the middle cranial fossa have the potential to result in clinically significant proptosis due to bone remodeling of orbital walls. Patients with unexplained proptosis should be evaluated with CT scans to establish the presence of bone remodeling and an arachnoid cyst, which can be confirmed with T2-weighted magnetic resonance imaging (MRI).
authors.affiliation: Faculty of Medicine, University of British Columbia and the Vancouver General Hospital, Vancouver, BC, Canada.
authors.forename: Teri
authors.initials: T
authors.lastname: Fisher
authors.forename: Robert
authors.initials: R
authors.lastname: Nugent
authors.forename: Jack
authors.initials: J
authors.lastname: Rootman
mesh_terms: D000368:Aged; D016080:Arachnoid Cysts / Q000175:diagnosis* / Q000503:physiopathology; D016723:Bone Remodeling / Q000502:physiology*; D005500:Follow-Up Studies; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic / Q000379:methods; D009916:Orbital Diseases / Q000175:diagnosis* / Q000503:physiopathology; D018570:Risk Assessment; D012720:Severity of Illness Index; D014057:Tomography, X-Ray Computed / Q000379:methods