title: Facial infiltrative lipomatosis.
abstract: BACKGROUND
  Although there are multiple case reports and small series concerning facial infiltrative lipomatosis, there is no composite radiological description of the condition.
  
  
  OBJECTIVE
  Radiological evaluation of facial infiltrative lipomatosis using plain film, sonography, CT and MRI.
  
  
  METHODS
  We radiologically evaluated four patients with facial infiltrative lipomatosis. Initial plain radiographs of the face were acquired in all patients. Three children had an initial sonographic examination to evaluate the condition, followed by MRI. One child had a CT and then MRI.
  
  
  RESULTS
  One child had abnormalities on plain radiographs. Sonographically, the lesions were seen as ill-defined heterogeneously hypoechoic areas with indistinct margins. On CT images, the lesions did not have a homogeneous fat density but showed some relatively more dense areas in deeper parts of the lesions. MRI provided better delineation of the exact extent of the process and characterization of facial infiltrative lipomatosis.
  
  
  CONCLUSIONS
  Facial infiltrative lipomatosis should be considered as a differential diagnosis of vascular or lymphatic malformation when a child presents with unilateral facial swelling. MRI is the most useful single imaging modality to evaluate the condition, as it provides the best delineation of the exact extent of the process.
authors.affiliation: Department of Medical Imaging, Royal Children's Hospital, Flemington Road, Parkville, Melbourne, VIC 3052, Australia.
authors.forename: Achyut K
authors.initials: AK
authors.lastname: Haloi
authors.forename: Michael
authors.initials: M
authors.lastname: Ditchfield
authors.forename: Anthony
authors.initials: A
authors.lastname: Penington
authors.forename: Roderic
authors.initials: R
authors.lastname: Phillips
mesh_terms: D000273:Adipose Tissue / Q000473:pathology; D002675:Child, Preschool; D005145:Face / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000473:pathology; D005146:Facial Asymmetry / Q000209:etiology; D005682:Gadolinium; D006801:Humans; D007223:Infant; D008068:Lipomatosis / Q000151:congenital / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging; D010256:Paranasal Sinuses / Q000000981:diagnostic imaging / Q000473:pathology*; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed
chemical_list: D005682:Gadolinium