Surgical Treatment for Ossification of Posterior Longitudinal Ligament in the Cervical Spine. Factors of Unexpected Improvement after Surgery.

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Surgical treatment was performed on 156 cases with ossification of the posterior longitudinal ligament in the cervical spine. Of these, 111 cases were evaluated for several factors (cases with other neurological diseases and a JOA Score of less than 13 points before surgery were excluded). Evaluated factors were; patient history, age, duration of symptoms, history of trauma, JOA score before surgery; radiological features, occupying rates of ossification in the cervical canal, spinal cord deformity, and spinal cord sectional area. All cases were separated into two groups depending on the improvement seen in JOA score at time of discharge from hospital; under 50% or over 50%. The group with an improvemet of less than 50% was older and had more cases with a history of trauma than the group over 50%. Duration of symptoms and radiographical data did not affect the results of surgical treatment. We conclude that when the ossification occupies the spinal canal to some extent, surgical treatment at an early stage could improve the paresis and afford good post-operative recovery.
西日本整形・災害外科学会の論文