Fifteen patients with lumbar disk herniation and lumbar cannal stenosis werer studied Comparing preoperative MRI with postoperative MRI, and preoperative myelogram with postoperative myelogram. Eight patients were lumbar disc herniation and the another were lumbar cannal stenosis. In lumbar disc herniation group, five patients were found to be improved in myelogram, and three patients were found to be improved in MR-image. These three patients were found to be improved in myelogram. In lumbar disk herniation, the improved group in myelogram and MRI were not related to non improvement group in myelogram and MRI. All patient with lumbar canal stenosis were found to be improved in myelogram and MRI.
