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Ossification of the posterior longitudinal ligament located on the concave side of the apex vertebra in adult spinal deformity

Koshimizu, Hiroyuki Ando, Kei Kobayashi, Kazuyoshi Nakashima, Hiroaki Machino, Masaaki Ito, Sadayuki Kanbara, Shunsuke Inoue, Taro Yamaguchi, Hidetoshi Imagama, Shiro 名古屋大学

2021.05

概要

A 48-year-old female patient presented with discomfort in the front of the chest. Whole spinal X-ray revealed a thoracic curve of 52°, and thoracic computed tomography (CT) myelography and magnetic resonance imaging (MRI) showed that ossification of the posterior longitudinal ligament (OPLL) on the concave side of the apex vertebra (T9) had highly compressed the spinal cord. Cervical MRI also showed that the C4–C5 intervertebral disc herniation mildly compressed the spinal nerve. In concomitant surgery, the patient underwent cervical laminoplasty, in which OPLL was removed by decompressive laminectomy and posterior correction surgery.In patients with adult spinal deformity (ASD), asymmetric mechanical stress at the apex vertebra can cause various abnormal conditions. Long-term local mechanical stress on the concave side of the apex vertebra might have affected OPLL formation in the present case. This is the first report of a surgical case for an ossification located on the concave side of the apex vertebra in a patient with ASD. Mechanical stress at the concave side of the apex vertebra was suspected to be a cause of formation of OPLL.

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参考文献

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