title: The clinical and diagnostic imaging findings of osteosarcoma of the jaw.
abstract: OBJECTIVE
  To clarify the valuable clinical features and diagnostic imaging findings regarding the diagnosis of osteosarcoma of the jaw (OSJ).
  
  
  METHODS
  The initial symptoms and diagnostic imaging findings of 10 patients with OSJ were analysed. The points analysed on the diagnostic images were as follows: any widening of the periodontal ligament space of the teeth on the periphery of the OSJ; the presence of radial spicules and Codman's triangle; any signs of bone destruction; and the patterns of osteogenesis.
  
  
  RESULTS
  All patients had pain and/or swelling of the affected site, and all OSJs, except for one edentulous case, showed a widening of the periodontal ligament space of the teeth on the periphery of the OSJ. Radial spicules or Codman's triangle were observed in only three cases (30%). Four out of five mandibular OSJs were osteolytic or osteolytic dominant with bone destruction, while, in contrast, four out of five maxillary OSJs were osteogenic or osteogenic dominant, and three out of the four maxillary OSJs did not show bone destruction. The osteogenic OSJ without bone destruction was similar to some benign cemento-osseous lesions of the jaw and thus was difficult to diagnose as OSJ based on the diagnostic imaging findings alone.
  
  
  CONCLUSIONS
  Even though some OSJ showed features similar to the benign tumours of the jaw bone based on the diagnostic imaging findings, the pain and swelling of the affected site, and the widening of the periodontal ligament space of the teeth on the periphery of OSJ were considered to be common findings, which may help in making an accurate diagnosis of OSJ in this limited series.
authors.affiliation: Department of Oral and Maxillofacial Radiology, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan. nakayama@rad.dent.kyushu-u.ac.jp
authors.forename: E
authors.initials: E
authors.lastname: Nakayama
authors.forename: K
authors.initials: K
authors.lastname: Sugiura
authors.forename: H
authors.initials: H
authors.lastname: Ishibashi
authors.forename: K
authors.initials: K
authors.lastname: Oobu
authors.forename: I
authors.initials: I
authors.lastname: Kobayashi
authors.forename: K
authors.initials: K
authors.lastname: Yoshiura
mesh_terms: D000293:Adolescent; D000328:Adult; D002485:Cementoma / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008339:Mandibular Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D008441:Maxillary Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D008875:Middle Aged; D010012:Osteogenesis; D010014:Osteolysis / Q000000981:diagnostic imaging; D012516:Osteosarcoma / Q000000981:diagnostic imaging* / Q000473:pathology; D010513:Periodontal Ligament / Q000000981:diagnostic imaging; D011859:Radiography; D014070:Tooth / Q000000981:diagnostic imaging