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Retrodental synovial cyst which disappeared after posterior C1-C2 fusion: A case report
Tomokazu Ito1, Masahiro Hayashi, Toshihiko Ogino
1Department of Orthopaedic Surgery, Yamagata University School of Medicine, Yamagata City, Japan.
Abstract:
Synovial cysts of the cervical spine are extremely rare. We describe an 8-year-old boy with atlantoaxial subluxation and hypoplasia of the dens. Magnetic resonance imaging showed a round lesion, posterior to the odontoid process. This mass was characterized by a low signal intensity on T1-weighted images, and high signal intensity on T2-weighted images. The retrodental synovial cyst disappeared after posterior atlantoaxial arthrodesis.
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