Figure legends:
Figure .1: A mild lumbar scoliosis, tiled pelvic (a), a severe CLSJK (b), and the S1-S2 HV (c) are seen in X-rays.
Figure .2: HV between S1-S2 are seen in coronal view (a) and sagittal view of CT scan (b).
Figure .3: The S1-S2 HV with compressive effect on the roots and dura is seen in MRI.
Figure .4: HV between S1-S2 resected and PSFI was done.