Spondylolisthesis occurs when one of the vertebrae in the spine slips out of place. This slippage can occur anywhere along the spine but tends to happen in the lumbar region or lower back.

Isthmic spondylolisthesis, or spondylolisthesis due to a lesion of the pars interarticularis, is a common source of pain and disability in both the pediatric and adult population. This review ...