Radiology in survivors of traumatic atlanto-occipital dislocation.

Traumatic atlanto-occipital dislocation is fatal, but survivals are reported. Six cases of survival after atlanto-occipital dislocation are presented. Lateral cervical spine radiographs demonstrated retropharyngeal swelling in all patients, and Powers' ratio was abnormal in five of six patients.

Fractures of the atlas vertebra. The two-part burst fracture of Jefferson.

Burst fractures of the atlas are usually diagnosed and treated as four-part fractures as described by Jefferson in 1920. Review of the literature, roentgenogram, computed axial tomography (CAT) scans, and laboratory studies, indicates that the burst fracture is usually, if not always, a two-part fracture. These findings are contrary to the accepted concept of burst fractures, and indicate that routine roentgenograms are not adequate for proper diagnosis.

Focal cortical dysplasia. Case report.

A histologically confirmed case of focal dysplasia of the cerebral cortex is presented. The computerized tomographic, electroencephalographic, pathological, and angiographic findings are discussed with respect to this rare developmental disorder. A review of the literature is presented with a possible etiology for this condition.

Radiographic evaluation of patients with cervical spine injury.

The radiographic evaluation of a patient with cervical spine injury should be prompt and efficient. Proper cooperation between the referring orthopaedic surgeon and the radiologist and shared knowledge of the circumstances of the accident results in rapid, accurate, and cost-effective assessment of the injury, which facilitates treatment planning.