A REVIEW OF 30 TUMORS AFFECTING JOINTS

The records and radiographs of 30 dogs with histopathologically confir med tumours affecting joints were reviewed. The previously most common ly reported primary joint tumour, the synovial sarcoma, only represent ed eight of the 30 cases (27%), However, the radiological appearance o f this tumour was very similar to others such as the fibrosarcoma, rha bdomyosarcoma, fibro myxosarcoma, malignant fibrous histiocytoma, lipo sarcoma and undifferentiated sarcoma, Other tumours recorded were a ma st cell tumour. haemangiopericytoma, osteosarcoma, squamous cell carci noma and amelanotic melanoma. This study shows that there are joint tu mours that have a similar radiographic appearance to synovial sarcomat a, and confirms the importance of histopathological diagnosis.