Types of Spondylolisthesis Spondylolisthesis is a condition in which a vertebra will slip out of position relative to the one directly below it. This is not to be confused with a slipped (or herniated) disc, in which there is a bulging of the intervertebral discs (the soft discs between your vertebrae that act like shock absorbers). The two conditions can coexist, but don’t always occur together. Both can cause back pain which radiates down to the legs, but many patients with
