De novo Ossification of the Posterior Longitudinal Ligament related to Pseudarthrosis after Anterior Cervical Decompression and Fusion with floating of the Ossification Foci

Abstract

Aim: The aim of this article is to report a case of ossification of the posterior longitudinal ligament (OPLL) in a patient who showed a de novo ossification focus compressing the spinal cord at the pseudarthrosis site several years after anterior decompression and fusion treatment for OPLL using the floating method.Background: Segmental motion of the ossification foci has been reported to promote OPLL development. The OPLL can grow longitudinally and thicken after laminoplasty, which allows segmental motion of the OPLL.