During the period of 5 years from July 1959 to June 1964, 210 cases of myelographic studies were performed atSeoul National University Hospital. The roentgenographic findings, clinical symptoms, operative findings inconnection with histo-pathological findings of these 210 cases were analyzed and following conclusions wereobtained. 1. The sex ratio of the material was 138 to 72 female patients. 2. Most of the patients had myelographicstudy within one year after the onset of their symptoms. 3. The most frequent disease entity was the herniatedintervertebral disc disease, consisting 62.8%, followed by spinal tumors 24.8% and miscellaneous disease 12.4%repectively. 4. Among the 132 cases of herniated intervertebral discdisease, consisted of the unilateral defect43.2%, central defect 41.7% and bilateral defect 15.1% repectively. 5. Among the 132 cases of herniatedintervertebral disc disease, the greatest incidence was the 4th lumbar intervertebral disc space 59.8%, followedby 1st sacral intervertebral disc space 31.8% and 3rd lumbar intervertebral disc space 6.8% respectively. 6. Twocases of cervical intervertebral disc lesion located in the 5th and 6th cervical intervertebral disc spaces werefound among the 132 cases of herniated intervertebral disc disease. 7. The spinal tumors were 52 cases and themost common site of tumor was in thoracic region 57.7% followed by lumbar region 28.9%, cervical region 11.5% andsacral region 3.9% respectively. 8. There 52 cases of inraspinal tumors were divided into intradural tumors 46.1%composed of intremedullary 9.6%, extram dullary 36.5%, and extradural tumors 53.9%. 9. The most common tumor wasmetastatic tumors 28.9%, neurofibroma 19.2%, tuberculoma 11.6%, malignant lymphoma, paragonimiasis andmiscellaneous disease composed 7.7% each and meningioma 5.8%, lipoma 3.8% and 1 case each of myeloma, chordoma andteratoma were seen.