Sonography of the normal and abnormal intact lumbar spinal canal.

Congenital and surgical defects of the neural arches of the spine have provided sonic windows and new applications for sonography in neuroradiology [1, 2]. The contents of the lumbar spinal canal can also be seen by an anterior approach, through the intervertebral disk, as illustrated in a recent atlas of sonography [3]. However, no previous report has been found on the use of sonography in the diagnosis of pathology of the intact lumbar spinal canal at the level of intervertebral disks.