RESUMO
Based on the analysis of the results of 297 contrast myelographies (MG) by means of water soluble agents made in patients with posterior hernias of lumbar intervertebral disks (PHLID), the authors define the potentialities of this technique in the diagnosis of PHLID. Additionally, two oblique X-ray films have been included into the exciting filming routine, which may detect all specific features of intervertebral disk damage at MG. The authors make additions into the well-known myelographic symptomatology of PHLID, by outlining the abnormal anterior configuration of a contrast column at the level of a diseased disk in PHLID at the foraminal site. The findings suggest that contrast MG with nonionic water-soluble agents is a rather effective technique in the diagnosis of PHLID.