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Spondylolytic instability managed by TLIF: X-ray lumbosacral spine anteroposterior view (a) and lateral view (b) showing grade-I spondylolytic spondylolisthesis instability at L5/S1 level. (c) Dynamic lateral view (flexion) showing spondylolysis (arrow) and anterior translation. (d) Dynamic lateral view (extension) showing spondylolysis (arrow) and angular motion at L5/S1 level. (e) T2W MRI scan of that patient showing involvement of L5/S1 level
