[Use of abrodil myelography in confirming the diagnosis of herniated lumbar nuclei pulposi].
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Intractable pain in the neck and upper extremity is frequently radicular in character and mechanical in origin. Rupture of a cervical intervertebral disc is the most common cause. Diagnosis and localization are more difficult in the cervical than in the lumbar region. Pantopaque myelogram should be considered only as a mean of localization. Operation should be preceded by a thorough trial of conservative treatment.
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For the operative procedure in lumbar disc extrusion it is important to expose the prolapsed disc and sequestrum without disintegration of the musculature and branches of r. dorsalis nervi spinalis or provoking lesions in the spinal canal. A classification helps to determine exact description of localization of disc material in craniocaudal and mediolateral directions. It can be correlated with the interlaminar window as a structure seen in the operative procedure. A speculum helps to limit the exposure for an interlaminar as well as a lateral access, thus reaching the structures concerned in the spinal canal with minimal irritation of the surrounding tissues. For interlaminar access partial excision of the lig. flavum is sufficient. The extrusions in the foraminal region that can be exposed laterally from a medial skin incision, as well as from a paramedial are between m. multifidus and m. longissimus. In revision surgery, the upper laminar corner is advantageous for entering the spinal canal.
We report a case of a 53 year old man with spinal claudication caused by a medial disc prolapse at the 11/12 thoracic intervertebral space. The disc prolapse was successfully removed via posterolateral approach.