Traumatic C4-C5 Unilateral Facet Dislocation With Posterior Disc Herniation Above a Prior Anterior Fusion

We report the case of a unilateral cervical facet dis­location above the level of a prior non-instrumented cervical discectomy and fusion, resulting in incomplete neurologic injury. Pre-reduction imaging demonstrated a large posterior disk extrusion. This finding altered our management approach from closed reduction to urgent anterior cervical discectomy, open anterior reduction, and fusion. The patient had excellent neurologic recov­ery and outcome at 12 months postoperative follow-up.