title: Keratocystic odontogenic tumour in a Hong Kong community: the clinical and radiological features.
abstract: OBJECTIVE
  The aim of this study was to evaluate the clinical and conventional radiological features of a consecutive series of cases of "keratocystic odontogenic tumour" (KCOT) affecting a Hong Kong Chinese community and to determine their outcome by follow-up.
  
  
  METHODS
  All cases were accompanied by appropriate radiography and were histopathologically confirmed.
  
  
  RESULTS
  33 consecutive KCOTs were reviewed. 18 patients were male. The mean age at first presentation was 30.6 years. Swelling was the most frequent presenting symptom. Those patients first presenting with pain were significantly older, whereas those first presenting with a maxillary lesion were significantly younger. The maxilla and mandible were affected in 13 and 20 cases, respectively. KCOTs were most frequently confined to the posterior sextants of both jaws. KCOTs affecting the maxilla were mainly unilocular, whereas those affecting the mandible were multilocular. Patients with multilocular KCOTs were significantly older. Patients with KCOTs associated with root resorption were significantly older, whereas patients associated with unerupted teeth were significantly younger. 69% displaced teeth, 41% resorbed them and 56% were associated with unerupted teeth. All but two were followed up for at least 2 years. Three lesions recurred.
  
  
  CONCLUSIONS
  KCOTs in this community displayed some differences from those reported in the literature.
authors.affiliation: Division of Oral & Maxillofacial Radiology, Faculty of Dentistry, UBC, 2199 Wesbrook Mall, Vancouver V6T 1Z3, BC, Canada. dmacdon@interchange.ubc.ca
authors.forename: D S
authors.initials: DS
authors.lastname: Macdonald-Jankowski
authors.forename: T K
authors.initials: TK
authors.lastname: Li
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D016009:Chi-Square Distribution; D005260:Female; D006723:Hong Kong / Q000453:epidemiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009808:Odontogenic Tumors / Q000000981:diagnostic imaging / Q000453:epidemiology* / Q000473:pathology; D011859:Radiography; D012307:Risk Factors