Duplicated odontoid process: plain radiographic and CT appearance of a rare congenital anomaly of the cervical spine.

Abstract

We describe a duplication of the odontoid process in a 6-year-old patient that included a partially fused midline ossicle on the anterior arch of C-1, fusion of the anterior lip of the foramen magnum and the arch of C-1, and an incomplete bony posterior arch of C-1.

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