[Secret information provided by lumbosacral myelography].

The authors emphasize the misleading images of lumbar myelography encountered in common vertebral diseases: disk disease, posterior interapophyseal joint diseases, degenerative and narrow spinal canal, in which dynamic views in the upright position represent the most original contribution of lumbosacral myelography as compared to new techniques. The authors also describe the postoperative appearances observed on lumbosacral myelography and some rarer diseases which must not be missed, such as epidural arachnoid cysts and epidural lipomatosis.