The virtues of the pantopaque myelography in the study of the herniated intervertebral disc have been generally accepted. As expected, it shows the presence of ruptured disc in the accuracy over 80%. But it is open to discussion whether the myelographic defects can indicate the exact location and type of herniated discs or not. In this article, we attempted to find out some correlation between the myelographic defect and the operative finding in viewing the size and shape of myelographic defects. This consideration may be helpful to make a clear cut diagnosis in the lumbar disc disease. One hundred and sixtytwo operative cases undergoing pantopaque myelography were subjected. Some obtained results will be presented.