[Benign and malignant synovialoma (author's transl)].

Synovialomas are rare tumorus. Their histology is as difficult as assessing their prognosis. Benign synovialomas should be extirpated radically. In case of malignancy amputation should be performed immediately, because amputation not until the first recurrence will often come too late. Only this treatment plan offers at present a chance to lower the otherwise high mortality rate.