title: Orbital chondrosarcoma developing in a patient with Paget disease.
abstract: OBJECTIVE
  To describe the radiologic, histopathologic, and cytogenetic features of an orbital chondrosarcoma developing in a patient with Paget disease.
  
  
  METHODS
  A 64-year-old woman presented with rapidly progressive proptosis of her right eye. Computed tomographic scans, histopathologic examination, and cytogenetic analysis were performed.
  
  
  RESULTS
  Computed tomographic scans disclosed osseous changes of the temporal and frontal bones, with areas of high density consistent with Paget disease. A soft-tissue tumor in the right lateral orbital wall was consistent with Paget sarcoma. On histology, a chondrosarcoma was diagnosed, which was confirmed by fluorescent in situ hybridization.
  
  
  CONCLUSIONS
  This is a unique case of orbital chondrosarcoma developing in a patient with Paget disease.
authors.affiliation: Department of Pathology, Erasmus University Rotterdam, The Netherlands. mooy@path.fgg.eur.nl
authors.forename: C M
authors.initials: CM
authors.lastname: Mooy
authors.forename: N C
authors.initials: NC
authors.lastname: Naus
authors.forename: A
authors.initials: A
authors.lastname: de Klein
authors.forename: W A
authors.initials: WA
authors.lastname: van den Bosch
authors.forename: D A
authors.initials: DA
authors.lastname: Paridaens
mesh_terms: D002813:Chondrosarcoma / Q000000981:diagnostic imaging / Q000209:etiology* / Q000473:pathology; D004273:DNA, Neoplasm / Q000032:analysis; D005260:Female; D005624:Frontal Bone / Q000473:pathology; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D008875:Middle Aged; D009918:Orbital Neoplasms / Q000000981:diagnostic imaging / Q000209:etiology* / Q000473:pathology; D010001:Osteitis Deformans / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology; D013701:Temporal Bone / Q000473:pathology; D014057:Tomography, X-Ray Computed
chemical_list: D004273:DNA, Neoplasm