title: Ewings sarcoma of the zygoma reconstructed with a gold prosthesis: a rare tumor and unique reconstruction.
abstract: BACKGROUND
  Ewings sarcoma (ES) is a rare tumor, most commonly encountered within the long bones during the first 20 years of life.
  
  
  METHODS
  We report the sixth case of ES of the zygoma, occurring in a 31-year-old male, and presenting a unique reconstructive opportunity. Diagnosis and preoperative planning were aided by CT/MR coregistration. Surgical reconstruction using 3D reconstructed CT images to produce an anatomically correct model provided the basis for a gold prosthesis construction.
  
  
  CONCLUSIONS
  Delayed definitive reconstruction provided opportunity for adequate tumor recurrence surveillance, and definitive histological diagnosis. The artefact produced on MR imaging from gold implants is minimal, permitting the unrestricted identification of potential future recurrence.
  
  
  CONCLUSIONS
  This case highlights the benefits of coregistration of radiological imaging, and custom-made gold prostheses providing the advantage of artefact-free MR imaging, which should be considered in patients requiring resection of zygomatic tumors and subsequent reconstruction.
authors.affiliation: Department of Oral & Maxillofacial Surgery, Oxford Radcliffe Hospitals NHS Trust, Oxford, UK.
authors.forename: Bara
authors.initials: B
authors.lastname: El-Khayat
authors.forename: Karen A
authors.initials: KA
authors.lastname: Eley
authors.forename: Ketan A
authors.initials: KA
authors.lastname: Shah
authors.forename: Stephen R
authors.initials: SR
authors.lastname: Watt-Smith
mesh_terms: D000328:Adult; D016477:Artifacts; D006047:Gold Alloys; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D019736:Prostheses and Implants; D011474:Prosthesis Design; D019919:Prosthesis Implantation / Q000379:methods; D019651:Plastic Surgery Procedures / Q000379:methods; D012512:Sarcoma, Ewing / Q000000981:diagnostic imaging / Q000473:pathology / Q000556:secondary / Q000601:surgery*; D012888:Skull Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D013125:Spinal Neoplasms / Q000556:secondary; D013524:Surgical Flaps; D013904:Thoracic Vertebrae / Q000473:pathology; D014057:Tomography, X-Ray Computed / Q000379:methods; D015050:Zygoma / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*
chemical_list: D006047:Gold Alloys