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Illustration showing the difference of sagittal spinopelvic alignment between DSPL (A) and DSS (B). A : This illustration displays the sagittal spinopelvic alignment of DSPL. B : This illustration displays the sagittal spinopelvic alignment of DSS. DSPL : degenerative spondylolisthesis, DSS : degenerative spinal stenosis, LL : lumbar lordosis, SLL : segmental lumbar lordosis, PT : pelvic tilt, PI : pelvic incidence, SVA : sagittal vertical axis from C7 plumb line.
