Traumatic dural tears: CT diagnosis using metrizamide.

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Abstract
Computed tomography of the spine using intrathecal metrizamide was performed on 6 patients with spinal trauma. Dural tears with contrast material escaping outside the subarachnoid space were documented in 5 cases. In 1 case, the thecal laceration had healed and the contrast material was confined in a post-traumatic meningocele. The characteristics of dural tears are demonstrable by metrizamide computed tomography, either in conjunction with myelography or as a separate procedure. Neurological deficits following spinal trauma may be aggravated by dural tears with entrapment of the spinal nerve roots.

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