Myelotomography in the diagnosis of lumbo-sacral disc prolapse.

Myelotomography is of considerable help in the preoperative diagnosis of lumbo-sacral intervertebral disc prolapses. Contrast views and new water-soluble media make the technique very useful. On the basis of 550 myelographies, indications for myelotomography are discussed. The examination should be performed in patients with clear clinical symptoms of intervertebral disc prolapse but negative routine myelograms. The introduction of myelotomography has reduced the incidence of false negative preoperative radiological investigations.