Transoral Decompression of Atlanto-Axial Dislocation Due to Odontoid Hypoplasia

Report of Two Cases

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    Surgical technique. A. Exposure. B. Palate split in midline and retracted laterally. C. Posterior pharyngeal tissue split in midline and sutured laterally.

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    Case 2. Left: Lateral laminogram demonstrating hypoplastic odontoid with slight posterior dislocation of C-1 on C-2. The free apical segment (arrow) is displaced posteriorly, compressing the ventral cervical cord. Right: Cervical myelogram showing posterior displacement of the Pantopaque column at C-1 and upper C-2.

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