title: Clinical signs and histologic findings in dogs with odontogenic cysts: 41 cases (1995-2010).
abstract: OBJECTIVE
  To characterize clinical signs and histologic findings in dogs with odontogenic cysts and determine whether histologic findings were associated with clinical features.
  
  
  METHODS
  Retrospective case series.
  
  
  METHODS
  41 dogs.
  
  
  METHODS
  Medical records were reviewed to obtain clinical data, including breed, age, sex, and lesion location. Microscopic sections and results of diagnostic imaging were reviewed.
  
  
  RESULTS
  Odontogenic cysts were identified in 41 dogs between 1995 and 2010. There were 29 dogs with dentigerous cysts, 1 with a radicular cyst, 1 with a lateral periodontal cyst, and 1 with a gingival inclusion cyst. In addition, 9 dogs with odontogenic cysts that had clinical and histologic features suggestive of, but not diagnostic for, odontogenic keratocysts seen in people were identified. In all 9 dogs, these cysts were located in the maxilla and surrounded the roots of normally erupted teeth. Of the 29 dogs with dentigerous cysts, 23 had a single cyst, 5 had 2 cysts, and 1 had 3 cysts. Six cysts were associated with an unerupted canine tooth, and 30 were associated with an unerupted first premolar tooth (1 cyst was associated both with an unerupted canine tooth and with an unerupted first premolar tooth). Dentigerous cysts were identified in a variety of breeds, but several brachycephalic breeds were overrepresented, compared with the hospital population during the study period.
  
  
  CONCLUSIONS
  Results suggested that a variety of odontogenic cysts can occur in dogs. In addition, cysts that resembled odontogenic keratocysts reported in people were identified. We propose the term canine odontogenic parakeratinized cyst for this condition.
authors.affiliation: Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California-Davis, CA 95616, USA. fjverstraete@ucdavis.edu
authors.forename: Frank J M
authors.initials: FJ
authors.lastname: Verstraete
authors.forename: Bliss P
authors.initials: BP
authors.lastname: Zin
authors.forename: Philip H
authors.initials: PH
authors.lastname: Kass
authors.forename: Darren P
authors.initials: DP
authors.lastname: Cox
authors.forename: Richard C
authors.initials: RC
authors.lastname: Jordan
mesh_terms: D000818:Animals; D004283:Dog Diseases / Q000145:classification* / Q000473:pathology*; D004285:Dogs; D005260:Female; D008297:Male; D009807:Odontogenic Cysts / Q000145:classification / Q000473:pathology / Q000662:veterinary*; D012189:Retrospective Studies; D009626:Terminology as Topic