Spondylolisthesis is a condition when a vertebrae, usually in the lower back, slips out of its position. Is most commonly found in teenagers and adults. Causes can range from a birth defect to mechanical injury. Symptoms range from the pain and numbness to loss of function. This article contains information and how to diagnose the condition as well as treatments for the different stages and grades of the condition. The outlook is good for most patients with noninvasive therapy but the condition needs to be addressed as soon as it is diagnosed.