Lateral listhesis correction is possible with minimally invasive multiple-level XLIF. Even with the L3 vertebra embedded within the superior end plate.

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Presentation transcript:

Lateral listhesis correction is possible with minimally invasive multiple-level XLIF. Even with the L3 vertebra embedded within the superior end plate of L4, this grade II lateral listhesis was reduced with the first-stage XLIF. The major reduction techniques include hinging the operating table such that the patient is bent toward the convexity, complete circumferential annulotomy, and XLIF performed from the concave side. Lateral listhesis correction is possible with minimally invasive multiple-level XLIF. Even with the L3 vertebra embedded within the superior end plate of L4, this grade II lateral listhesis was reduced with the first-stage XLIF. The major reduction techniques include hinging the operating table such that the patient is bent toward the convexity, complete circumferential annulotomy, and XLIF performed from the concave side. In contrast to open traditional anterior scoliosis procedures, which are approached from the convex side, multilevel XLIF is performed from the concave side. Even the most severe cases of lateral listhesis can be corrected via the concave side. The trajectory to each of the L1–2, L2–3, L3–4, and L4–5 disks can be reached through a minimally invasive surgery incision 5 cm or shorter in length. Preoperative axial magnetic resonance imaging views showed severe stenosis at L3–4 with compression of the thecal sac, severe ligamentum flavum hypertrophy, and facet arthropathy, which were corrected through XLIF. However, a synovial cyst and soft-tissue compression of the nerve roots need to be directly decompressed through a posterior approach. (A) Correction of a coronal decompensation of 2 cm or more and sagittal decompensation of 10 cm or more needs to be achieved with posterior instrumentation. (B) Standing anteroposterior radiograph of same patient at follow-up. The pedicle orientation on the right side at L3 and L4 is now collinear, whereas in A, the right L3 pedicle is the oblique typical Scotty dog profile. It would require multiple postoperative CT cuts through the vertebra at different angles to quantitate the derotation more precisely, but the important point clinically is that the symptoms of radiculopathy from pedicular kinking of the convex apical nerve roots were alleviated. This 67-year-old man's neurogenic claudication was dramatically relieved postoperatively, and he could walk upright for extended periods. Paul C. McAfee et al. Int J Spine Surg 2013;7:e8-e19 © 2013 ISASS - International Society for the Advancement of Spine Surgery. Published by Elsevier Inc. All rights reserved.