Abstract
1. In twenty-five patients with rheumatoid arthritis of the knee examined by contrast arthrography certain typical features were encountered. These consisted of enlargement of the suprapatellar pouch and loss of the normally smooth outline of the joint cavity because of nodular filling defects. In some cases less definite filling defects were seen, due to loose fibrinous deposits, particularly in popliteal cysts.
2. This method of assessment of the results of synovectomy of the knee correlated well with the clinical findings. The more satisfactory the clinical result the more normal the arthrograph. Patients who had recurrence of pain, swelling and tenderness in the knee showed arthrographic findings similar to those before operation.
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