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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.<\/jats:p>","DOI":"10.3415\/vcot-11-04-0049","type":"journal-article","created":{"date-parts":[[2012,1,27]],"date-time":"2012-01-27T08:47:04Z","timestamp":1327654024000},"page":"160-166","source":"Crossref","is-referenced-by-count":17,"title":["Primary synovial osteochondromatosis of the stifle in an English Mastiff"],"prefix":"10.3415","volume":"25","author":[{"given":"W. I.","family":"Baltzer","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"C.","family":"L\u00f6hr","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S. M.","family":"Stieger-Vanegas","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"T. 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