title: Histopathologic comparison of normal and hyperplastic condyles.
abstract: OBJECTIVE
  The aim of this study was to compare normal and hyperplastic mandibular condyles using two different histopathologic staining techniques.
  
  
  METHODS
  Nine cases of condylar hyperplasia and 13 normal cases were studied after hematoxylin and eosin and silver staining.
  
  
  RESULTS
  There was a significant difference between the two groups in the thickness of the hyperplastic cartilage layer of condylar soft tissue (P = 0.017). Also, the number of argyrophilic nucleolar organizer regions was significantly higher in the condylar hyperplasia case group (P = 0.0001). No significant differences could be demonstrated in cartilage island frequency, penetration depth, and distribution in the cancellous bone of condyles.
  
  
  CONCLUSIONS
  The thickness of the hyperplastic cartilage layer appears significantly increased in condylar hyperplasia. In addition, argyrophilic nucleolar organizer region count may be useful in histopathological identification of condylar hyperplasia.
authors.affiliation: Department of Oral and Maxillofacial Pathology, School of Dentistry, Shahid Beheshti University of Medical Sciences, Evin, Tehran, Iran. behnameslami@yahoo.com
authors.forename: Behnam
authors.initials: B
authors.lastname: Eslami
authors.forename: Hossein
authors.initials: H
authors.lastname: Behnia
authors.forename: Haleh
authors.initials: H
authors.lastname: Javadi
authors.forename: Kazem Savojbolaghchi
authors.initials: KS
authors.lastname: Khiabani
authors.forename: Arash Shoja
authors.initials: AS
authors.lastname: Saffar
mesh_terms: D000293:Adolescent; D000328:Adult; D002356:Cartilage / Q000473:pathology; D016022:Case-Control Studies; D002467:Cell Nucleus / Q000648:ultrastructure; D004396:Coloring Agents; D004801:Eosine Yellowish-(YS); D005260:Female; D005355:Fibrosis; D005456:Fluorescent Dyes; D006416:Hematoxylin; D006801:Humans; D006818:Hyalin / Q000648:ultrastructure; D006965:Hyperplasia; D008297:Male; D008335:Mandibular Condyle / Q000473:pathology*; D008648:Mesoderm / Q000473:pathology; D009697:Nucleolus Organizer Region / Q000648:ultrastructure; D016622:Silver Staining; D018709:Statistics, Nonparametric
chemical_list: D004396:Coloring Agents; D005456:Fluorescent Dyes; D004801:Eosine Yellowish-(YS); D006416:Hematoxylin