[Giant cell tumor of tendon sheath in association with synovialchondroma. An unusual tumor-combination at the temporomandibular joint (author's transl)].

A tumor at the temporomandibular joint is reported, which so far has not yet been described. Histologically it turned out to be a combination of synovialchondroma and giant cell tumor of tendon sheath. By reason of the microscopic picture and the course of 2 1/2 years without relapse it is a benign tumor. In postoperative x-rays of the mandible a thickening and sclerosis as well as cystic areas of increased translucence at the place of removal of the tumor were found, which had already existed preoperatively in a lower degree.