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The odontoid process is located in a critical area of the spine and is part of a complex structure, the atlanto-axial junction. This C1-2 junction allows for a great deal of cervical mobility in planes of rotation, flexion, and extension. Lesions of the odontoid process and associated ligaments can result in compression of the brainstem, cervicomedullary junction, and spinal cord. Resultant symptoms...