[Synovial chondromatosis of the temporomandibular joint--a differential diagnosis to parotid gland tumor].

Synovial chondromatosis of the temporomandibular joint is an uncommon disease of cartilaginous transformation of synovial membrane with formation of loose bodies within the joint space. The stimulus for synovial chondromatosis at this site is unknown. Symptoms frequently include pain and preauricular swelling with occasional snapping during jaw movements. Radiographs of the TMJ may be normal or show multiple, partially calcified loose bodies within the joint. Treatment consists of removal of the loose bodies together with all affected synovium. In this paper a case of synovial chondromatosis affecting the temporomandibular joint is reported and the literature of 38 cases is reviewed.