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Vet Pathol 44:533-536 (2007)
© 2007 American College of Veterinary Pathologists
BRIEF COMMUNICATIONS AND CASE REPORTS

Dental Benign Cementomas in Three Horses

R. Kreutzer, P. Wohlsein, C. Staszyk, M. Nowak, V. Sill and W. Baumgärtner

Bergische Tierklinik Heiligenhaus GmbH, Heiligenhaus, Germany (MN), Department of Pathology, University of Veterinary Medicine, Hannover, Germany (RK, PW, WB), Institute of Anatomy, University of Veterinary Medicine Hannover, Germany (CS), Tierärztliche Klinik für Pferde, Bargteheide, Germany (VS)

Abstract

Cementoma is a very rare odontogenic neoplasm of mesenchymal origin. Clinically, in 3 horses, multiple bony enlargements of the upper and lower jaw extending into the oral cavity were observed. Radiographically, multiple, well-circumscribed, radiopaque masses surrounding the roots of the upper and lower incisors or an upper premolar tooth were present. Due to malocclusion and local pain, single teeth were extracted in each case. Grossly, a hard grayish-white mass surrounding the root of the incisors and the premolars was identified. Histopathologically, the tumors consisted of excessive deposition of cementum-like tissue. Cells, resembling cementoblasts, lined irregularly shaped lacunae, which were present in the tumor tissue, and showed minimal cellular pleomorphism. Mitotic figures were not present. Macroscopically and histologically, all 3 equine cases displayed great similarities to cementomas in other species. However, due to their high degree of differentiation, hypercementosis must be considered as a differential diagnosis.

Key words: Cementoma; horses; hypercementosis; incisor; odontogenic tumor; premolar.

Request reprints from Dr. W. Baumgärtner, Department of Pathology, University of Veterinary Medicine, Bünteweg 17, D-30559, Hannover (Germany). E-mail: wolfgang.baumgaertner{at}tiho-hannover.de






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