![]() Posterior decompression, partial or complete reduction of L5, L5-S1 intervertebral fusion (including disc resection, sacral dome resection and autogenous bone grafting) and instrumentation of L4-S1 or L5-S1 were performed in 48 patients. The patients had the following surgical indications:(1) 44 cases had low back pain and/or lower extremity pain that failed to respond to conservative treatment and (2) six cases had cauda equina syndrome. According to the Meyerding grading scale, the cohort included 2 grade I, 13 grade II, 19 grade III, 13 grade IV, and 3 grade V spondylolisthesis cases and the average slip percentage was 62.8 ± 23.1%. ![]() The purposes of this study were: (1) to investigate the prevalence of scoliosis in dysplastic spondylolisthesis (2) to assess scoliosis resolution or persistence after surgery and (3) to propose a modified classification of scoliosis associated with dysplastic spondylolisthesis.Ī total of 50 young patients (six males and 44 females) with an average age of 14.9 ± 5.6 years (range 7–30 years) were included in this study. The present study reviewed a consecutive series of L5-S1 dysplastic spondylolisthesis patients treated with complete or partial reduction with short-segment fixation and fusion. From literature, patients with dysplastic spondylolisthesis appear to have a higher rate of scoliosis than patients with isthmic spondylolisthesis, suggesting that, in addition to the sagittal plane abnormality, dysplastic spondylolisthesis patients are prone to coronal plane abnormality. OS, also termed torsion scoliosis, is associated with asymmetric slippage and sink of the olisthetic vertebra, with more rotation in the olisthetic vertebra (Fig. SS is thought to be caused by muscle spasm and similar to scoliosis associated with other painful spine pathologies, like disk herniation, with typical listing of the spine to the side. Two main types of spondylolisthesis-induced scoliosis have been defined in the literature: spasm scoliosis (SS) and olisthetic scoliosis (OS). The estimated prevalence of scoliosis in the adolescent population is 0.47–5.2%, whereas it is 18–48% in young patients with lumbar spondylolisthesis, suggesting that spondylolisthesis may induce scoliosis by some mechanism.
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