Figure 2.

L5/S1 PLIF. High grade isthmic spondylolisthesis presenting with bilateral L5 radiculopathy suitable for posterior rather than anterior approach. (A) T2 weighted magnetic resonance imaging demonstrating vertical angulation of the L5/S1 articulation with Grade II spondylolisthesis; (B) severe foraminal stenosis with bilateral L5 nerve impingement (arrows); (C) bilateral pars and lamina resection with interbody cage insertion (Vigor PLIF, A-Spine ASIA, Taiwan) and pedicle screw fixation with L5 reduction screws (ES-2, Stryker, USA); (D) reduction maneuver and final result. PLIF, posterior lumbar interbody fusion.