We report a rare case of synovial cyst of the dens (odontoid process) in a 61 year old women with no previous history of trauma. She had progressive symptoms of 1 year's duration due to spinal cord compression. Magnetic resonance imaging of cervical spine revealed a large mass posterior to the dens which was compressing the spinal cord near the cervicomedullary junction. This lesion was at first considered radiologically to represent an exuberant pannus formation or a meningioma of the foramen magnum, but subsequent surgical intervention and pathological examination revealed that it was a synovial cyst. Similar cases reported in the literature are reviewed and discussed.
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Choe, W., Walot, I., Schlesinger, C. et al. Synovial cyst of dens causing spinal cord compression. Case report. Spinal Cord 31, 803–807 (1993). https://doi.org/10.1038/sc.1993.124
- synovial cyst
- spinal cord compression
- cervical spine
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