Primary synovial osteochondromatosis of the stifle in an English Mastiff.

TitlePrimary synovial osteochondromatosis of the stifle in an English Mastiff.
Publication TypeJournal Article
Year of Publication2012
AuthorsSmith TJ, Baltzer WI, Löhr CV, Stieger SM
JournalVeterinary and comparative orthopaedics and traumatology : V.C.O.T
Volume25
Issue2
Pagination160-6
Date Published2012
ISSN0932-0814
Abstract

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.

Alternate JournalVet Comp Orthop Traumatol