Reliability of classification systems for subaxial cervical injuries.

Study Design:  Interobserver and intraobserver reliabilityObjective: To measure and compare the interobserver and intraobserver reliability of the cervical spine injury severity score (CSISS), the subaxial injury classification (SLIC) and severity scale, and the Allen-Ferguson system in patients with subaxial cervical spine injuries presenting to the emergency department.

Methods:  Five examiners independently reviewed c-spine x-rays (CT/MRI) of 50 consecutive patients with subaxial cervical-spine injuries. They classified each case using CSISS, SLIC, and the Allen-Ferguson system.

Acute progression of spondylolysis to isthmic spondylolisthesis in an adult.

Study Design: Acute progression of spondylolysis to spondylolisthesis in an adult without degenerative disc disease at the slip level is reported.

Objective: To document a case of adult-onset progression of isthmic spondylolisthesis, in which the disc space height at the slip level was normal. There were no known risk factors for progression, and the olisthesis occurred acutely after minimal trauma.