RADIOGRAPHIC AND HISTOLOGIC APPEARANCE OF SYNOVIAL OSTEOCHONDROMATOSIS OF THE FEMOROTIBIAL BURSAE IN A HORSE: A CASE HISTORY REPORT

Abstract

Synovial osteochondromatosis, an uncommon monarticular disease characterized by intrasynovial proliferation of cartilage cells, is described in a 16‐year‐old horse. Synovial osteochondromatosis is a direct metaplasia of connective tissue cells within the synovial or bursal structure. Etiology is unknown although trauma is implicated. Radiographic diagnosis is difficult and may be confused with chondrosarcoma. The presence of intra articular loose bodies and calcified granular matter is not pathognomonic for the disease. Histologic diagnosis is dependent on wide excision biopsy and serial sectioning. Radical synovectomy is the treatment of choice if extracapsular expansion is identified. Intrasynovial osteochondromatosis appears self‐limiting. Cosmetic appearance and limitation of motion are the reasons treatment is sought.