title: Odontogenic tumors: clinical and pathology study of 238 cases.
abstract: Odontogenic tumors are neoplasms that develops exclusively in the gnathic bones; they originate from odontogenic tissues, by epithelial or mesenchymal proliferation, or both.
  
  
  OBJECTIVE
  To evaluate the incidence of odontogenic tumors in a specific institution, and to compare these findings with other studies in the literature. STUDY FORMAT: A cross-sectional cohort retrospective study.
  
  
  METHODS
  The sample was obtained from the files of patients with odontogenic tumors diagnosed between January 1992 and March 2007 (15 years). Cases in which the diagnosis could be adapted to the new World Health Organization (WHO) of 2005 were included. Data such as gender, age, anatomical site, histological type and symptomatology were analyzed.
  
  
  RESULTS
  Odontogenic tumors were 4.76% of all biopsied lesions within the studied period. The mean age was 30.7 years; 57% of the patients were male. The keratocystic odontogenic tumor was the most prevalent histological type (30%), followed by the ameloblastoma (23,7%). The rate of asymptomatic cases was 75.7%.
  
  
  CONCLUSIONS
  Odontogenic tumors occurred more frequently in females, in the second and third decades of life, and more commonly in the mandible; most cases were asymptomatic.
authors.affiliation: Dental surgeon, resident in buccomaxillofacial surgery and traumatology, Hospital Universitário Oswaldo Cruz.
authors.forename: Rafael Linard
authors.initials: RL
authors.lastname: Avelar
authors.affiliation: Dental surgeon, student in the specialization course on buccomaxillofacial surgery and traumatology, Universidade de Pernambuco - FOP/UPE.
authors.forename: Antonio Azoubel
authors.initials: AA
authors.lastname: Antunes
authors.affiliation: Dental surgeon, resident in buccomaxillofacial surgery and traumatology, Hospital Universitário Oswaldo Cruz - HUOC/UPE.
authors.forename: Thiago
authors.initials: T
authors.lastname: de Santana Santos
authors.affiliation: Doctor, adjunct professor of buccal pathology, Faculdade de Odontologia de Pernambuco - Universidade de Pernambuco - FOP/UPE.
authors.forename: Emanuel Sávio
authors.initials: ES
authors.lastname: de Souza Andrade
authors.affiliation: Doctor, adjunct professor of buccomaxillofacial surgery and traumatology, Faculdade de Odontologia de Pernambuco - Universidade de Pernambuco - FOP/UPE. Discipline of buccal pathology, Faculdade de Odontologia da Universidade de Pernambuco - FOP/UPE.
authors.forename: Edwaldo
authors.initials: E
authors.lastname: Dourado
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D000564:Ameloblastoma / Q000145:classification / Q000453:epidemiology / Q000473:pathology; D002648:Child; D002675:Child, Preschool; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009808:Odontogenic Tumors / Q000145:classification / Q000453:epidemiology / Q000473:pathology*; D017678:Sex Distribution; D012737:Sex Factors; D014944:World Health Organization; D055815:Young Adult