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. 2006 Jun;27(6):1211–1216.

Fig 1.

Fig 1.

Patient 9. CT myelogram shows a well-delineated ovoid extra-axial mass (white arrow), at the foramen magnum level, associated with midline clefting of a craniovertebral junction fusion anomaly (black open arrow). Bony anomalies are associated with approximately 50% of spinal NE cysts but have rarely been described in intracranial cases.