Imaging findings of synovial cyst arising at temporomandibular joint: A case report and review of the literature

Abstract

Background: TMJ synovial cyst with few symptoms is rare. It was detected by magnetic resonance imaging (MRI); furthermore, we present the review that focused imaging findings. Case presentation: A 48-year-old female complained TMJ discomfort during mouth opening. MRI showed a lesion that exhibited high signal intensity on T2-weighted images behind the condylar head. The lesion was a cyst lined by synovial cells. Conclusion: Synovial cysts frequently cause swelling and pain; however, some cases produce few symptoms. MRI is considered useful for diagnosing synovial cysts. All TMJ pathogenesis should be addressed during TMJ surgery to prevent recurrence of synovial cysts.