Abstract
The follow-up of these seventy-three cases suggested the following conclusions:
1. The clinical signs alone are not always sufficient to make the diagnosis of herniated nucleus pulposus with sufficient accuracy.
2. When positive, myelography was reliable as a means of localising the hernia.
3. In doubtful cases in which conservative treatment failed a clearly positive myelography turned the scale for a well-indicated operation.
4. In doubtful cases a clearly negative myelography has often rightly been a contra-indication for laminectomy.
5. No serious complication from the use of water-soluble contrast medium for myelography has been encountered.
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