Synovial cysts are found mainly in periarticular areas of the wrist, ankle, and knee, but also rarely in the temporomandibular joint (TMJ). Only 1 case of bilateral synovial cysts in the region of the TMJ has been reported. This case report described bilateral cysts in the TMJ in a 54-year-old Korean woman. T2-weighted magnetic resonance imaging (MRI) revealed bilateral oval cystic lesions lateral to the condylar capsule, whereas computed tomography (CT) apparently did not show the right hand side lesion. The cyst on the left side was surgically excised, and fine needle aspiration was performed on the right hand cyst. After 24 months, the long term follow-up showed no sign of recurrence.

• 유지용(원광대학교 치과대학 구강악안면외과학교실) | Ji-Yong Yoo
• 최은주(원광대학교 치과대학 구강악안면외과학교실 원광대학교 치의학연구소) | Eun-Joo Choi
• 이병도(원광대학교 치과대학 영상치의학교실) | Byung-Do Lee
• 윤정훈(원광대학교 치과대학 대전치과병원 구강병리과 원광골재생연구소) | Jung-Hoon Yoon
• 이완(원광대학교 치과대학 영상치의학교실 원광대학교 치의학연구소) | Wan Lee Correspondence