[Malignant synovialoma (author's transl)].

Based upon 351 cases of malignant synovialoma from the literature and 12 own observations clinical and roentgenographic findings, differential diagnosis, therapy, and prognosis are discussed. Because of early recurrencies and metastases early diagnosis is most important for therapeutic results. By means of radical surgery and subsequent intensive irradiation of the previous tumor site and the draining lymphatics a 5-years survival rate of 30-50% can be achieved.