title: Imaging features of unusual intracranial cystic meningiomas.
abstract: OBJECTIVE
  To describe the imaging features of unusual intracranial cystic meningiomas in infants and adults.
  
  
  METHODS
  We retrospectively reviewed the magnetic resonance and computed tomography findings for 2 female patients and 3 male patients, ranging in age from 1 to 73 years (median 41 years), with histopathologically proven cystic meningioma.
  
  
  RESULTS
  Although cystic meningiomas usually appear as solid and cystic masses, they may present as a mainly multicystic lesion. The wall of a cystic part of the meningioma may include both enhancing and unenhancing areas at imaging. The cystic portion of a meningioma is hypointense on diffusion-weighted images and markedly hyperintense on corresponding apparent diffusion coefficient maps.
  
  
  CONCLUSIONS
  Cystic meningiomas may vary in appearance at imaging. They can be very challenging when present in infants. Knowledge of imaging findings and awareness of variability in the differential diagnosis can help to avoid preoperative diagnostic pitfalls.
authors.affiliation: Department of Radiology, Trakya University School of Medicine, Edime, Turkey. demirkemal@superonline.com
authors.forename: M Kemal
authors.initials: MK
authors.lastname: Demir
authors.forename: Murat
authors.initials: M
authors.lastname: Müslüman
authors.forename: Gamze
authors.initials: G
authors.lastname: Kilicoglu
authors.forename: Tayfun
authors.initials: T
authors.lastname: Hakan
authors.forename: Fugen V
authors.initials: FV
authors.lastname: Aker
mesh_terms: D000328:Adult; D000368:Aged; D002466:Cell Nucleolus / Q000648:ultrastructure; D002467:Cell Nucleus / Q000648:ultrastructure; D002843:Chromatin / Q000648:ultrastructure; D003287:Contrast Media; D038524:Diffusion Magnetic Resonance Imaging; D005260:Female; D006801:Humans; D007223:Infant; D008279:Magnetic Resonance Imaging; D008297:Male; D008579:Meningioma / Q000175:diagnosis* / Q000473:pathology; D008875:Middle Aged; D012189:Retrospective Studies; D015173:Supratentorial Neoplasms / Q000175:diagnosis* / Q000473:pathology; D036542:Tomography, Spiral Computed; D014057:Tomography, X-Ray Computed
chemical_list: D002843:Chromatin; D003287:Contrast Media