Peer-reviewed veterinary case report
English Mastiff with stifle lameness from synovial
By Smith, T J et al.·Published in Veterinary and comparative orthopaedics and traumatology : V.C.O.T·2012·Department of Clinical Science, United States·View original on PubMed →
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Original publication title: Primary synovial osteochondromatosis of the stifle in an English Mastiff.
- Species:
- dog
Plain-English summary
A 2-year-old male English Mastiff was brought to the vet because he had been limping on his left back leg for five months. After various tests, including X-rays and a special type of joint examination, the vet found that the limping was due to a rare condition called primary synovial osteochondromatosis, where small bone and cartilage pieces form in the joint. The vet removed 194 of these pieces using a minimally invasive procedure. At a follow-up call 13 months later, the owner reported that the dog was mostly free from limping and had much better movement, although he still showed mild lameness occasionally.
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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.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/22286965/