Figure 2.

This is a 56-year-old male who presented with right leg weakness and urinary incontinence. (a) Lateral lumbar plain radiograph and (b) T2-weighted magnetic resonance imaging of the lumbar spine demonstrated a Meyerding Grade IV spondylolisthesis at L5-S1. As depicted in the (c) anteroposterior and (d) lateral lumbar plain radiographs, he subsequently underwent a laminectomy at L4-S2, a posterolateral fusion from L3-Pelvis, a sacral dome osteotomy, with an additional L5-S1 discectomy and mixed allograft and local autograft placement. No formal reduction maneuver was attempted intraoperatively.