This paper is based on a review of 161 cases, in which lipiodol myelography had been done and which were operated upon, thereby so affording an accurate anatomic diagnosis for comparison with the myelographic findings. The latter were divided into nine groups: seven including cases with myelographic aspects considered typical (137 cases) and two with atypical or inconclusive myelograms (24 cases). For each one of these myelographic group, it was verified agreement with the surgical findings in percentages such as follows: angioma, 75%; ruptured intervertebral disc, 67.4%; extradural tumor, 59.2%; intradural tumor, 45.4%; intramedullar tumor, 33.3%; arachnoiditis, 32.2%; hypertrophy of ligamentum flavum, 22.2%. Discordant cases showed that the same myelographic aspect may be related to various anatomosurgical diagnosis. Statistical approaches have shown significance only for intramedullar tumor and hypertrophy of ligamentum flavum groups. Some surgical findings could not be related to any myelographic aspect. Conclusion is that myelographic aspects have some value to predict the nature of the lesions, but not in a definite way, due to the possibility of discordances as shown above. So, it seems more adequate to speak of "suggestive myelographic aspects" instead of "typical aspects".