Image 09927: Discectomies and Fusion Surgery at L3-4, L4-5 and L5-S1 IllustrationThis graphic includes six medical illustrations for discectomies and lumbar spinal fusion at L3 4, L4 5 and L5 S1. Illustration 1 demonstrates incision and exposure in the low back. Illustration 2 demonstrates placement of a cannula, retraction of the cauda equina, and removal of disc material. Illustration 3 demonstrates the lumbar spine with the disc material removed from L3 S1. Illustration 4 demonstrates surgical preparation of the disc space.