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Is it necessary to extend fusion to L4 when correcting pediatric L5-S1 spondylolisthesis? – Lumbar Fusion

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This article, published in the Journal of Neurosurgery: Spine, examines the necessity of extending fusion to the L4 level in the surgical treatment of pediatric L5-S1 spondylolisthesis. The study included a retrospective analysis of 68 pediatric cases, categorized into two groups based on the upper instrumented vertebra (group L4 and group L5). Data were collected from medical records, radiological images, and clinical outcomes. The results showed that fusion to the L5 level yielded comparable satisfactory results to fusion to the L4 level, although there was an increased likelihood of adjacent-segment instability (ASI) with fusion to L5. The study suggests that extending fusion to L4 may not be necessary for most patients with pediatric L5-S1 spondylolisthesis

Summarised by Mr Mo Akmal – Lead Spinal Surgeon
The London Spine Unit : most specialised day surgery unit in London

Published article

S: Fusion to L5 could achieve comparable satisfactory results to fixation to L4, albeit with increased likelihood of ASI. Extension of fusion to L4 may not be necessary for most patients with pediatric L5-S1 spondylolisthesis.

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J Neurosurg Spine. 2024 Feb 2:1-6. doi: 10.3171/2023.11.SPINE231035. Online ahead of print.ABSTRACTOBJECTIVE: The objective of this study was to investigate whether extending fusion to L4 is imperative in the surgical treatment of pediatric L5-S1 spondylolisthesis.METHODS: This retrospective analysis encompassed 68 pediatric cases of dysplastic L5-S1 spondylolisthesis who underwent posterior lumbar interbody fusion surgery at two,

J Neurosurg Spine. 2024 Feb 2:1-6. doi: 10.3171/2023.11.SPINE231035. Online ahead of print.

ABSTRACT

OBJECTIVE: The objective of this study was to investigate whether extending fusion to L4 is imperative in the surgical treatment of pediatric L5-S1 spondylolisthesis.

METHODS: This retrospective analysis encompassed 68 pediatric cases of dysplastic L5-S1 spondylolisthesis who underwent posterior lumbar interbody fusion surgery at two hospitals. Patients were categorized into two groups based on the upper instrumented vertebra (group L4 and group L5). Data were collected from medical records and radiological images obtained preoperatively and at last follow-up. Radiographic parameters including slip percentage (SP), lumbar lordosis (LL), sagittal vertical axis (SVA), pelvic incidence (PI), Spinal Deformity Study Group dysplastic lumbosacral angle (SDSG-LSA), pelvic tilt (PT), Dubousset’s lumbosacral angle (Dub-LSA), sacral slope (SS), and severity index (SI) were measured. Surgery-related data and complication data were also collected. The incidence rates of complications were compared, including those of neurological deficit, adjacent-segment instability (ASI), and other complications. ASI was defined as progression of slippage > 3 mm or posterior opening > 5° in the adjacent segment. Clinical outcomes were assessed with the numeric rating scale (NRS) and the Oswestry Disability Index (ODI) scores. The follow-up period for all patients lasted a minimum of 2 years.

RESULTS: Among all 68 patients, group L4 consisted of 15 patients and group L5 comprised 53 patients. The patients included in both groups had comparable baseline demographic characteristics and radiographic parameters. Postoperative SP and SDSG-LSA were significantly lower in group L5 (p < 0.05). No other postoperative radiographic differences were observed between groups. One patient in group L4 and 3 patients in group L5 experienced transient neurological deficits (p > 0.05). There were 13 cases of ASI in group L5 compared with none in group L4 (24.5% vs 0%, p > 0.05). Of the 13 patients with ASI, 4 underwent revision surgery due to L4-5 level instability and clinical symptoms. The remaining individuals exhibited no symptoms, and regular annual follow-up assessments are being conducted for all patients. The NRS and ODI scores at final follow-up did not exhibit any significant differences between the two groups.

S: Fusion to L5 could achieve comparable satisfactory results to fixation to L4, albeit with increased likelihood of ASI. Extension of fusion to L4 may not be necessary for most patients with pediatric L5-S1 spondylolisthesis.

PMID:38306645 | DOI:10.3171/2023.11.SPINE231035

The London Spine Unit : most specialised day surgery unit in London

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Is it necessary to extend fusion to L4 when correcting pediatric L5-S1 spondylolisthesis?

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J Neurosurg Spine. 2024 Feb 2:1-6. doi: 10.3171/2023.11.SPINE231035. Online ahead of print.ABSTRACTOBJECTIVE: The objective of this study was to investigate whether extending fusion to L4 is imperative in the surgical treatment of pediatric L5-S1 spondylolisthesis.METHODS: This retrospective analysis encompassed 68 pediatric cases of dysplastic L5-S1 spondylolisthesis who underwent posterior lumbar interbody fusion surgery at two

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