Rare case of synovial chondromatosis presenting as jaw pain

Synovial chondromatos is (SC) is an uncommon disorder defined as reactive cartilaginous proliferation, characterised by synovial metaplasia (Yu, et al., 2004). With intra-articular proliferation of cartilaginous nodules originating from the synovial membrane. It mainly affects large joints such as knee, hip, shoulder, and elbow. Its manifestation in the Temporomandibular joint (TMJ), is a rare finding, occurring predominantly in females. CT, MRI and arthroscopy facilitate the clinical diagnosis of SC, but pathological analysis is mandatory to confirm the disease (Martín-Granizo et al., 2005). This paper reports a case of a 35 years old woman who presented with a long-standing history (1 year) of pain in right TMJ. There were no limitations to jaw opening. Initial clinical and Radiological picture done outside our hospital suggested a picture of osteosarcoma, for which she received treatment. Histological and follow-up features of this lesion diagnosed it as SC of the TMJ.