ArticleClinics in orthopedic surgery2026
Morphometric Variations in Oblique Lumbar Interbody Fusion Corridors in Degenerative Lumbar Scoliosis: A Comparative Study of the Apex Direction.
Article in Clinics in orthopedic surgery, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Backgroud: Degenerative lumbar scoliosis (DLS) alters spinal anatomy, impacting the feasibility and dimensions of surgical corridors for oblique lumbar interbody fusion (OLIF). This study aimed to compare the morphometric characteristics of OLIF corridors between patients with left- and right-apex curves, focusing on corridor dimensions, psoas muscle asymmetry, and segmental artery positioning. Methods: retrospective analysis of 80 patients with DLS (left apex: n = 43; right apex: n = 37) was conducted. Corridor angles and distances, psoas muscle cross-sectional areas, and segmental artery locations were measured at L2-3, L3-4, and L4-5 using T2-weighted magnetic resonance imaging (MRI). Multivariate regression analysis identified key anatomical predictors of corridor variation at L2-3. Results: Regardless of the apex direction, the left-sided corridor was consistently larger across all levels. Corridor angles were significantly greater on the left side in both groups (left apex: L2-3, 39.7° vs. 13.5°; L3-4, 38.3° vs. 11.9°; L4-5, 38.6° vs. 6.9°; right apex: L2-3, 53.7° vs. 18.1°; L3-4, 43.1° vs. 18.5°; L4-5, 28.6° vs. 11.9°). Psoas muscle areas were larger on the concave side of the curve (left apex: 125.7 mm Conclusions: OLIF corridors in DLS patients demonstrate consistent left-sided dominance, regardless of apex direction. Psoas muscle asymmetry and segmental artery positioning contribute to corridor variations. While the left-sided approach remains standard, right-sided access may be feasible in select cases, particularly at L4-5. These findings provide insights for optimizing preoperative planning and surgical decision-making in DLS patients.
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