Cover Journal of the American Veterinary Medical Association
Journal of the American Veterinary Medical Association
ISSN:
0003-1488
Publication Date:
15 Jun 2020

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The canine furcation cyst, a newly defined odontogenic cyst in dogs: 20 cases (2013–2017)

Jason W. Soukup DVM1,2 and Cynthia M. Bell DVM2,3
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  • 1 1Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706.
  • | 2 2Center for Comparative Oral and Maxillofacial Pathology, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706
  • | 3 3Specialty Oral Pathology for Animals, LLC, Geneseo, IL 61254.
DOI:
https://doi.org/10.2460/javma.256.12.1359
Volume/Issue:
Volume 256: Issue 12
Online Publication Date:
15 Jun 2020
Restricted access
Reprints and Permissions Purchase Article

Abstract

OBJECTIVE

To characterize clinical, radiographic, and histologic features of canine furcation cysts (CFCs) in dogs and to propose possible mechanisms of CFC development.

ANIMALS

20 client-owned dogs with CFCs biopsied between January 1, 2013, and December 31, 2017.

PROCEDURES

Medical records of the Center for Comparative Oral and Maxillofacial Pathology at the University of Wisconsin-Madison were retrospectively searched to identify records of dogs that had surgical biopsy specimens of mandibular or maxillary cavitary lesions diagnosed as odontogenic cysts and that met additional inclusion criteria. Biopsy sample submission records, medical records, clinical and radiographic images, and histologic samples were reviewed. Clinical, radiographic, and histologic features were evaluated.

RESULTS

Mean body weight and age of affected dogs were 23.5 kg (51.7 lb) and 8.2 years, respectively. All 20 dogs had a unilateral cyst, with the right (n = 13) or left (7) maxillary fourth premolar tooth affected and viable in all dogs. A predominant clinical sign was a fluctuant swelling of the buccal gingiva and mucosa overlying the CFC, and enucleation of the cyst lining, with or without extraction of the affected tooth, resolved the lesion in most dogs.

CONCLUSIONS AND CLINICAL RELEVANCE

Our findings indicated that CFC is an odontogenic cyst of uncertain etiopathogenesis and that complete evaluation of the clinical, radiographic, and histologic features of the lesion in affected patients is necessary to distinguish a CFC from other odontogenic cysts and tumors in dogs. Defining CFCs in terms of characteristic features permits accurate diagnosis and appropriate treatment of these previously unclassifiable odontogenic cysts in dogs.

Supplementary Materials

    • Supplementary Table s1 (PDF 113 kb)
    • Supplementary Table s2 (PDF 112 kb)
    • Supplementary Table s3 (PDF 116 kb)

Contributor Notes

Address correspondence to Dr. Soukup (jason.soukup@wisc.edu).