title: CT and MR Imaging in a Large Series of Patients with Craniofacial Fibrous Dysplasia.
abstract: BACKGROUND
  In this retrospective review of patients with craniofacial fibrous dysplasia (FD), the clinical and radiological findings of CT and MR scan were analyzed.
  
  
  METHODS
  The study material included 32 patients, at 9 to 68 years of age that were directed for differential diagnostics of several disorders in the head. We recorded CT and MRI data related to the lesion number, location, sidedness, appearance, and sex of the cases with craniofacial FD.
  
  
  RESULTS
  Of 32 patients involved in this study, 17 had monostotic and 15 had polyostotic involvement pattern. Bones most commonly involved by monostotic involvement in females were, in descending order, mandibular, maxillary, and sphenoid bones, while the sphenoid bone was involved the most in males. Leontiasis ossea was observed in 2 patients. Sclerotic and mixed lesion types were more common in both females and males. In T1- and T2-weighted MRI sequences, hypointensity was more common compared to hyperintensity or heterogeneous intensity. The type of enhancement of lesions was found similar after contrast medium administration.
  
  
  CONCLUSIONS
  In the presence of craniofacial FD during CT or MRI imaging of the head, a detailed description of FD lesions may provide an important clinical benefit by increasing radiological experience during the diagnostics of this rare disorder.
authors.affiliation: Department of Radiology, Cumhuriyet University School of Medicine, Sivas, Turkey.
authors.forename: Mehmet Haydar
authors.initials: MH
authors.lastname: Atalar
authors.affiliation: Department of Radiology, Cumhuriyet University School of Medicine, Sivas, Turkey.
authors.forename: Ismail
authors.initials: I
authors.lastname: Salk
authors.affiliation: Department of Radiology, Ege University School of Medicine, Izmir, Turkey.
authors.forename: Recep
authors.initials: R
authors.lastname: Savas
authors.affiliation: Department of Otorhinolaryngology, Cumhuriyet University School of Medicine, Sivas, Turkey.
authors.forename: Ismail Onder
authors.initials: IO
authors.lastname: Uysal
authors.affiliation: Department of Radiology, Cumhuriyet University School of Medicine, Sivas, Turkey.
authors.forename: Hulusi
authors.initials: H
authors.lastname: Egilmez
keywords: Craniofacial Abnormalities; Fibrous Dysplasia of Bone; Magnetic Resonance Imaging; Tomography Scanners, X-Ray Computed