Pharyngeal Odontoma in an Adult Walleye (Sander vitreus)

An adult walleye (Sander vitreus) was submitted to Cornell University for evaluation of a hard pale-tan pharyngeal mass attached to the gill arches. Dozens of hard white conical structures radiated from the surface. Microscopically, conical structures were identified as denticles and rested on plate...

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Bibliographic Details
Published in:Veterinary pathology 2013-05, Vol.50 (3), p.483-487
Main Authors: Coffee, L. L., Bogdanovic, L. B., Cushing, T. L., Bowser, P. R.
Format: Article
Language:English
Subjects:
Animals
Fish Diseases - pathology
Gills - pathology
Hamartoma - pathology
Hamartoma - veterinary
Odontoma - pathology
Odontoma - veterinary
Perches
Pharyngeal Neoplasms - pathology
Pharyngeal Neoplasms - veterinary
Teleostei
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Summary:An adult walleye (Sander vitreus) was submitted to Cornell University for evaluation of a hard pale-tan pharyngeal mass attached to the gill arches. Dozens of hard white conical structures radiated from the surface. Microscopically, conical structures were identified as denticles and rested on plates of dysplastic orthodentine, cementum, and acellular bone. A diagnosis of compound odontoma was made based upon the presence of proliferative epithelial and mesenchymal odontogenic tissues that recapitulated tooth structures normally present on gill rakers. Odontomas are classified as hamartomas and typically develop in immature diphyodont mammals. The pharyngeal location and lifelong regeneration of teeth in fish, however, both qualify the present diagnosis in the pharyngeal region of an adult teleost. Ontogenic and morphologic differences between mammalian and piscine dentition and differentials for tooth-bearing tumors in fish are presented within the context of a developmental anomaly.
ISSN:0300-9858
1544-2217
DOI:10.1177/0300985812446149