title: Usefulness of three-dimensional full-scale modeling of surgery for a giant cell tumor of the cervical spine.
abstract: METHODS
  Case report.
  
  
  OBJECTIVE
  To report a case with giant cell tumor (GCT) of C6 vertebra, in which three-dimensional (3-D) full-scale modeling of the cervical spine was useful for preoperative planning and intraoperative navigation.
  
  
  METHODS
  A university hospital in Japan.
  
  
  METHODS
  A 27-year-old man with a GCT involving the C6 vertebra presented with severe neck pain. The C6 vertebra was collapsed and the tumor had infiltrated around both vertebral arteries (VAs). A single-stage operation combining anterior and posterior surgical procedures was scheduled to resect the tumor and stabilize the spine. To evaluate the anatomic structures within the surgical fields, we produced a 3-D full-scale model from the computed tomography angiography data. The 3-D full-scale model clearly showed the relationships between the destroyed C6 vertebra and the deviations in the courses of both VAs. Using the model, we were able to identify the anatomic landmarks around the VAs during anterior surgery and to successfully resect the tumor. During the posterior surgery, we were able to determine accurate starting points for the pedicle screws. Anterior iliac bone graft from C5 to C7 and posterior fixation with a rod and screw system from C4 to T2 were performed without any complications. Postoperatively, the patient experienced relief of his neck pain.
  
  
  CONCLUSIONS
  The 3-D full-scale model was useful for simultaneously evaluating the destruction of the vertebral bony structures and the deviations in the courses of the VAs during surgery for GCT involving the cervical spine.
authors.affiliation: Department of Orthopaedic Surgery, Chiba University Graduate School of Medicine, Chuo-ku, Chiba, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Yamazaki
authors.forename: T
authors.initials: T
authors.lastname: Akazawa
authors.forename: A
authors.initials: A
authors.lastname: Okawa
authors.forename: M
authors.initials: M
authors.lastname: Koda
mesh_terms: D000328:Adult; D001863:Bone Screws; D002574:Cervical Vertebrae / Q000473:pathology* / Q000601:surgery; D018212:Giant Cell Tumor of Bone / Q000601:surgery*; D006801:Humans; D008297:Male; D008953:Models, Anatomic; D013123:Spinal Fusion; D013125:Spinal Neoplasms / Q000601:surgery*; D014057:Tomography, X-Ray Computed