Magnetic resonance imaging of the ossification of the posterior longitudinal ligaments in the cervical spine.

概要

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MRI studies of fifty-two cases with OPLL in the cervical spine showed some interesting facts. Firstly, twenty-five percents of these cases had iso-or high signal intensity in the area of the OPLL, which indicated the pre-OPLL stage. Then, MRI could show us the change of the spinal cord between pre-operation and post-operation. The volume of the spinal cord is usually increased by posterior decompressive laminectomy than by anterior operation. However, some cases were observed in which the volume did not increase sufficiently or did not increase at all (atrophic type) or increased too much on the contrary. Finally, in OPLL with spinal cord injury, low intensity area in the spinal cord was observed at the edge of the OPLL. It suggested that a dynamic factor was more important than a static factor such as a narrow canal.
西日本整形・災害外科学会の論文