A spondylolisthesis is a type of spinal column instability whereby adjacent spinal vertebrae show a severe break with one another. If the upper vertebra is displaced towards the body than this is a ventrolisthesis, in the opposite direction it is a retrolisthesis. This condition is more severe than luxation or dislocation.

Sometimes, at first, the spondylistheses will hardly show any affects, but the spondylistheses can lead to long-term single or multiple nerve compression or stretching of the nerves in the spinal canal canal. This can cause nerve damage and can lead eventually to the function loss of a nerve.

Spondylolisthesis can lead to paralyses of both legs and the function of bladder and rectum. Simultaneously the spinal discs in the adjacent segments wear down excessively, what can cause additional strong pain.