title: Clear-cell variant of calcifying epithelial odontogenic tumor: clinical and radiographic characteristics.
abstract: OBJECTIVE
  Clear cells have been reported in approximately 8% of cases of calcifying epithelial odontogenic tumor (CEOT). The purpose of this study was to describe the clinical and radiographic features of clear-cell CEOT (CCEOT).
  
  
  METHODS
  Eighteen cases of CCEOT were identified by review of the literature from 1958 to 2001, and a new one was added (total 19; 12 central, 7 peripheral).
  
  
  RESULTS
  Fourteen tumors (74%) were located in the mandible, with the central lesions favoring the posterior area and the peripheral lesions the anterior-bicuspid area. Radiographic features were as follows: 50% radiolucent, 50% mixed radiolucent-radiopaque; 92% unilocular; 64% well-defined noncorticated borders, 27% well-defined corticated borders, 9% irregular borders. Cortical perforation was common (67%) compared with CEOT without a clear-cell component (6.7%). Recurrence was reported in 17% of the central lesions and none of the peripheral ones.
  
  
  CONCLUSIONS
  CCEOT is a distinct variant of CEOT; its high tendency for cortical perforation may indicate a more aggressive behavior.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Rabin Medical Center, Beilinson Campus, Petah Tikva, Israel.
authors.forename: Yakir
authors.initials: Y
authors.lastname: Anavi
authors.forename: Ilana
authors.initials: I
authors.lastname: Kaplan
authors.forename: Mete
authors.initials: M
authors.lastname: Citir
authors.forename: Shlomo
authors.initials: S
authors.lastname: Calderon
mesh_terms: D000328:Adult; D006801:Humans; D008297:Male; D008339:Mandibular Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D009808:Odontogenic Tumors / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D011859:Radiography