Atlantoaxial rotatory subluxation

Initial anteroposterior radiograph of the cervical spine indicated loss of symmetry between lateral masses of the atlas and odontoid process (A). Lateral cervical spine radiograph showed loss of the normal lordosis (B). Coronal CT images demonstrated narrowing of the right lateral atlantodental interval and a wider left lateral atlantodental interval (C). Sagittal CT views of the cervical spine indicated no abnormal findings (D). Axial CT views confirmed that the odontoid was lying eccentrically between the lateral masses of the atlas (E).