[Value of myelography and computer tomography in problem cases of lumbar intervertebral disk diagnosis].

The accuracy of myelographic and computerized tomographic findings in lumbar layer diagnostic techniques is examined in a total of 133 patients suffering from root compression syndrome. The comparatively high percentage of accurate results 94% (myelogr.) and 90% (ct) in 93 cases where the findings were operatively substantiated,--sinks when the problem cases are considered apart. In 22% of our patients, one method alone was not sufficient for satisfactory preoperative diagnosis. The value of myelography and ct in the diagnosis of problem cases in herniated lumbar disk disease is different. Because of specific advantages (Tab. 1) in the representation of the spinal canal the techniques have their own position. When clinical and computertomographical results are clear and corresponding, myelography-as an invasive diagnostic technique--is unnecessary. In problem cases, however, both methods should be used to complement one another.