title: Thirty years clinicopathological study of 60 calcifying cystic odontogenic tumors in Iranian population.
abstract: OBJECTIVE
  To reevaluate all cases previously diagnosed as calcifying odontogenic cyst (COC) from the archives of the Department of Oral Pathology at Mashhad Faculty of Dentistry from 1978 to 2008.
  
  
  METHODS
  Clinical histories and microscopic slides of all cases diagnosed as COC were reviewed and analyzed statistically. The information about patients such as age, sex, clinical features, radiographic view and other necessary data was gathered from biopsy files.
  
  
  RESULTS
  The majority of cases occurred in mandible and four cases were peripherally. Thirteen cases were associated with other odontogenic tumors and 11 cases were odontoma type. In two cases, recurrence was reported after surgical treatment which underwent malignant transformation.
  
  
  CONCLUSIONS
  Calcifying cystic odontogenic tumor (CCOT) in Iranian population occurs in younger age group with slightly male predilection and more mandibular, unicystic and simple type.
  
  
  CONCLUSIONS
  It is better to address the noncystic CCOT lesions with their specific terms in order to make histopathological characteristics clear.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Faculty of Dentistry and Dental Research Center, Mashhad University of MedicalSciences, Iran.
authors.forename: Ataollah
authors.initials: A
authors.lastname: Habibi
authors.forename: Nasrollah
authors.initials: N
authors.lastname: Saghravanian
authors.forename: Jahanshah
authors.initials: J
authors.lastname: Salehinejad
authors.forename: Hamid
authors.initials: H
authors.lastname: Jafarzadeh
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007492:Iran / Q000453:epidemiology; D008137:Longitudinal Studies; D008297:Male; D008339:Mandibular Neoplasms / Q000145:classification / Q000453:epidemiology / Q000473:pathology*; D008441:Maxillary Neoplasms / Q000145:classification / Q000453:epidemiology / Q000473:pathology*; D008875:Middle Aged; D018333:Odontogenic Cyst, Calcifying / Q000145:classification* / Q000453:epidemiology / Q000473:pathology*; D009808:Odontogenic Tumors / Q000145:classification / Q000453:epidemiology / Q000473:pathology; D015995:Prevalence; D012189:Retrospective Studies; D012737:Sex Factors; D018709:Statistics, Nonparametric; D009626:Terminology as Topic; D055815:Young Adult