• Soichiro Masuda, Shunsuke Fujibayashi, Hiroaki Kimura, Shimei Tanida, Bungo Otsuki, Koichi Murata, Takayoshi Shimizu, and Shuichi Matsuda.
• Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan. Electronic address: smasuda0306@gmail.com.
• World Neurosurg. 2021 Aug 1; 152: 107-112.

ObjectiveThis study aims to demonstrate the efficacy of salvage oblique lumbar interbody fusion (OLIF) surgery for pseudarthrosis after posterior/transforaminal lumbar interbody fusion (PLIF/TLIF).MethodsThe study group were patients with leg or back pain induced by pseudarthrosis after PLIF/TLIF. These patients underwent salvage OLIF surgeries in our institutions between July 2015 and Oct 2019. We retrospectively evaluated their clinical and radiographic outcomes.ResultsSeven consecutive patients (all male; mean age 68.4 ± 9.3 years, range 53-81 years) were included in this study. There was no intraoperative complications in all cases. Six of 7 patients achieved bone union (at average 33.4 months follow-up) and had a successful postoperative course. Only 1 patient failed to gain bony fusion and required additional revision surgery due to progression of sagittal and coronal malalignment at 18 months after salvage OLIF surgery.ConclusionsThe salvage OLIF approach was useful option for pseudarthrosis after PLIF/TLIF. It enabled us to build a rigid anterior support, allowed for extensive curettage of intervertebral scar tissue, and reduced the rate of the complications associated with dealing with posterior scar tissue.Copyright © 2021 Elsevier Inc. All rights reserved.

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