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  • Title: Transient paraparesis after laminectomy for thoracic myelopathy due to ossification of the posterior longitudinal ligament: a case report.
    Author: Yamazaki M, Okawa A, Koda M, Goto S, Minami S, Moriya H.
    Journal: Spine (Phila Pa 1976); 2005 Jun 15; 30(12):E343-6. PubMed ID: 15959359.
    Abstract:
    STUDY DESIGN: Case report. OBJECTIVES: We report a case with thoracic myelopathy due to ossification of the posterior longitudinal ligament (OPLL) of the spine, in which neurologic deterioration progressed after laminectomy and was markedly reversed after additional posterior instrumented fusion. SUMMARY OF BACKGROUND DATA: Many different surgical procedures may be used in the treatment of thoracic OPLL. However, the possibility of postoperative paraplegia remains a major risk, and consistent protocols and procedures for surgical correction of thoracic OPLL have not been established. METHODS: The patient was a 53-year-old man with continuous OPLL at T3-T8 that compressed the spinal cord anteriorly. Anterior decompression surgery employing a posterior approach was initiated, but during OPLL extirpation electrophysiologic monitoring of spinal cord activity showed abnormalities. As a result, the procedure was converted to a wide laminectomy. Over the next 4 weeks, kyphosis of the thoracic spine increased and myelopathy worsened, producing severe paraparesis. RESULTS: Four weeks after surgery, posterior instrumented fusion (T1-L1) was performed without correction of the kyphosis. After the fusion, neurologic deficits gradually recovered and the patient was fully recovered after 10 months. At follow-up 15 years after the fusion, no neurologic deterioration was seen despite the presence of residual anterior impingement of spinal cord by OPLL. CONCLUSIONS: The present case suggests that kyphosis and instability are major factors that affect the severity of thoracic myelopathy due to OPLL, and posterior fusion with spinal instrumentation is a safe and effective adjunct procedure for surgical treatment of thoracic OPLL.
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