UNUSUAL SYNOVIAL TUMORS

Abstract

This is a report of six unusual tumors that are thought to arise from synovial tissue. These cases fall into two main groups: malignant synoviomas, which usually arise around joints, and benign synoviomas. The correlation laid down by Jaffe and co-workers¹ and by Spencer and Whimster² was used in grouping the so-called giant cell tumor (xanthoma of tendon and bursa) and villous nodular synovitis as benign synovioma. The nosology of these lesions has been discussed by Wright,³ Sabrazes and de Grailly,⁴ Tillotson and others,⁵ and Razemon and Bizard.⁶ Historically it is of interest to note that the older writers used the terms myeloma, myeloplax, and sarcoma of tendon sheath to designate the benign synoviomas. Chassaignac,⁷ who reported on a lesion in the thumb in 1852, has been given credit by various writers for reporting the first case of synovial tumor, but his description