The value of the anteroposterior radiograph in 'hidden' fractures and dislocations of the lower cervical spine. A case report.

Fractures and dislocations of the cervical spine may be overlooked if the lower cervical vertebrae are not adequately demonstrated on the supine lateral radiograph. Failure to diagnose cervical spinal injury radiologically may have tragic consequences should delayed spinal cord damage ensue. A case report illustrating this is presented. Since no difficulty is encountered in demonstrating the lower cervical vertebrae on the anteroposterior view with the patient supine, careful attention to the position and appearances of the spinous processes on this radiograph may enable diagnosis of fractures and/or dislocations to be made. Three radiological signs of value are discussed.