title: [A case of cystic craniofacial fibrous dysplasia].
abstract: BACKGROUND
  Fibrous dysplasia is a benign, idiopathic, fibro-osseous disease.
  
  
  METHODS
  A 17-year-old girl had presented with left proptosis for the previous two years, associated to homolateral hemicranial pain. Clinical examination was normal except for non-reducible axile exophthalmia. Computed tomography and magnetic resonance imaging of the head revealed an extensive cystic tumor of the left fronto-ethmoido-sphenoidal region, with compression of the left frontal lobe and medial orbital wall. The radiological appearance suggested a mucocele but histological examination, after surgery, proved a fibrous dysplasia.
  
  
  CONCLUSIONS
  Fibrous dysplasia with fronto-sphenoido-ethmoidal localization may be misdiagnosed as mucocele. Histology proves the diagnosis.
authors.affiliation: Service de neurochirurgie, centre hospitalier universitaire des Spécialités, Rabat, Maroc.
authors.forename: Y
authors.initials: Y
authors.lastname: Arkha
authors.forename: S
authors.initials: S
authors.lastname: Benazzou
authors.forename: A
authors.initials: A
authors.lastname: Harmouch
authors.forename: S
authors.initials: S
authors.lastname: Derraz
authors.forename: A
authors.initials: A
authors.lastname: El Ouahabi
authors.forename: A
authors.initials: A
authors.lastname: El Khamlichi
mesh_terms: D000293:Adolescent; D001845:Bone Cysts / Q000000981:diagnostic imaging / Q000601:surgery*; D003399:Craniotomy; D003937:Diagnosis, Differential; D005260:Female; D005359:Fibrous Dysplasia, Polyostotic / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans; D008279:Magnetic Resonance Imaging; D009078:Mucocele / Q000175:diagnosis; D011859:Radiography; D012886:Skull / Q000601:surgery*