title: Proliferating cell nuclear antigen and Ki67 immunoreactivity in ameloblastomas.
abstract: OBJECTIVE
  This study used proliferating cell nuclear antigen (PCNA) and Ki67 to evaluate and compare the in situ proliferative activity of (1) solid and multicystic and (2) unicystic ameloblastomas in an attempt to provide a scientific basis for any differences in biologic behavior that exists between these 2 groups of lesions.
  
  
  METHODS
  Twenty archival tissue sections, 10 of primary unicystic and 10 of solid and multicystic ameloblastomas, were immunohistochemically stained with PCNA and Ki67 antisera. Immunoreactivity was evaluated by the counting of cells, and the data obtained were statistically analyzed.
  
  
  RESULTS
  The results showed that cellular proliferative activity varied within the ameloblastoma types. The unicystic ameloblastomas showed statistically significantly higher PCNA and Ki67 labeling indices than the solid and multicystic variant.
  
  
  CONCLUSIONS
  There appears, therefore, to be no correlation between proliferative activity as shown by these proteins and reported biologic behavior.
authors.affiliation: University of the Witwatersrand, Division of Oral Pathology, Department of Anatomical Pathology, South Africa. shabnumm@mail.saimr.wits.ac.za
authors.forename: Shabnum
authors.initials: S
authors.lastname: Meer
authors.forename: Jacqueline S
authors.initials: JS
authors.lastname: Galpin
authors.forename: Mario
authors.initials: M
authors.lastname: Altini
authors.forename: Hedley
authors.initials: H
authors.lastname: Coleman
authors.forename: Hasiena
authors.initials: H
authors.lastname: Ali
mesh_terms: D000564:Ameloblastoma / Q000737:chemistry* / Q000473:pathology*; D000704:Analysis of Variance; D002455:Cell Division; D006801:Humans; D007150:Immunohistochemistry; D007573:Jaw Neoplasms / Q000737:chemistry / Q000473:pathology*; D019394:Ki-67 Antigen / Q000032:analysis; D015588:Observer Variation; D018809:Proliferating Cell Nuclear Antigen / Q000032:analysis
chemical_list: D019394:Ki-67 Antigen; D018809:Proliferating Cell Nuclear Antigen