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The images of a 34-year-old male patient. (A) Preoperative magnetic resonance imaging T2-weighted image sagittal view showed herniated and migration of intervertebral disc at L4–5–S1. (B) Preoperative computed tomography scan sagittal reconstruction view showed bilateral spondylolysis at L5–S1. Arrowhead: Spondylolysis. Arrow: normal pars interarticularis. Preoperative (C) and postoperative (D) radiographies demonstrated well-maintained lumbar lordosis.
