Primary synovial osteochondromatosis of the stifle in an English Mastiff

T. J. Smith; W. I. Baltzer; C. Löhr; S. M. Stieger-Vanegas

doi:10.3415/VCOT-11-04-0049

Veterinary and Comparative Orthopaedics and Traumatology, Table of Contents

Vet Comp Orthop Traumatol 2012; 25(02): 160-166
DOI: 10.3415/VCOT-11-04-0049

Case Report

Schattauer GmbH

Primary synovial osteochondromatosis of the stifle in an English Mastiff

T. J. Smith

¹Department of Clinical Science, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon, USA

,

W. I. Baltzer

¹Department of Clinical Science, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon, USA

,

C. Löhr

²Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, USA

,

S. M. Stieger-Vanegas

¹Department of Clinical Science, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon, USA

› Author Affiliations

Abstract

Summary

A two-year-old, 97 kg, male neutered English Mastiff was evaluated for left pelvic limb lameness of five months duration localized to the stifle joint. Following radiographic, computed tomographic and arthroscopic examination, the lameness was subsequently diagnosed as being caused by primary synovial osteochondromatosis. In total, 194 osteochondral bodies were removed using arthroscopy in combination with a mini-arthrotomy. Histology and immunohistochemistry of the loose osteochondral fragments confirmed the diagnosis with a moderately high degree of differentiation and low cellularity. Nuclear staining for Ki-67 revealed decreasing differentiation and increasing cellularity in the fragments. At the 13 months telephone follow-up the owner reported that the dog was free from lameness and had a vastly improved function compared with preoperative levels, although mild lameness did occasionally occur. This is the first report of computed tomography, arthroscopy and immunohistochemistry confirming a case of primary synovial osteochondromatosis in a dog.

Keywords

Osteochondromatosis - Ki-67 - dog - stifle - arthroscopy

Full Text

References

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