Araştırma Makalesi

Association Between Spinopelvic Alignment and MRI-Based Stenosis Severity According to Schizas Grade in Degenerative Lumbar Spinal Stenosis

Cilt: 36 Sayı: 2026 26 Ekim 2026
Murat Özcan Yay *, Süleyman Akilli
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Association Between Spinopelvic Alignment and MRI-Based Stenosis Severity According to Schizas Grade in Degenerative Lumbar Spinal Stenosis

Öz

Aim: Degenerative lumbar spinal stenosis (DLSS) is a common age-related disorder, but the relationships between MRI-defined stenosis severity, local radiological findings, and pelvic orientation remain unclear. We hypothesized that pelvic tilt would increase with Schizas grade.
Materials and Methods: This single-center retrospective cross-sectional study included 120 consecutive patients older than 50 years with clinically and radiologically diagnosed DLSS who underwent lumbar MRI and standardized standing lateral radiography. The index stenotic level was defined as the level with the highest Schizas grade. Ligamentum flavum thickness, average disc height, and wedge index were measured at the same index level. Spinopelvic parameters included pelvic incidence, pelvic tilt, sacral slope, lumbar lordosis, and pelvic incidence–lumbar lordosis mismatch. Secondary comparisons and correlations were assessed using Benjamini–Hochberg false-discovery-rate correction. Adjusted associations with higher Schizas grade were examined using ordinal logistic regression.
Results: Seventeen patients had grade A, 25 grade B, 33 grade C, and 45 grade D stenosis. L4–L5 was the most common index level, and 74 patients (61.7%) had multilevel stenosis. Index-level ligamentum flavum thickness increased across Schizas grades and remained significant after multiplicity correction. Average disc height and wedge index decreased with increasing severity, but these findings were weaker and exploratory. Pelvic tilt showed a weak positive correlation with Schizas grade. In the adjusted model, greater ligamentum flavum thickness, older age, and higher pelvic tilt were associated with higher Schizas grade. The pelvic tilt association was small, and model explanatory capacity was modest.
Conclusions: Greater index-level ligamentum flavum thickness showed the most robust association with higher Schizas grade. Pelvic tilt was weakly associated with stenosis severity, but the cross-sectional design does not establish a compensatory response caused by stenosis. These findings are hypothesis-generating and require prospective validation.

Anahtar Kelimeler

Ligamentum flavum, lumbar vertebrae, magnetic resonance imaging, pelvic tilt, Spinal stenosis

Etik Beyan

Ethical approval was obtained from the Non-Interventional Clinical Research Ethics Committee of Aydın Adnan Menderes University Rectorate (Decision No: 10, Protocol No: 2025/379).

Kaynakça

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Ayrıntılar

Birincil Dil

İngilizce

Konular

Cerrahi (Diğer)

Bölüm

Araştırma Makalesi

Yazarlar

Yayımlanma Tarihi

26 Ekim 2026

Gönderilme Tarihi

6 Mart 2026

Kabul Tarihi

20 Temmuz 2026

Yayımlandığı Sayı

Yıl 2026 Cilt: 36 Sayı: 2026

DOI

https://doi.org/10.54005/geneltip.1903817

IZ

https://izlik.org/JA63BA46GB

Kaynak Göster

RIS / Bibtex
APA
Yay, M. Ö., & Akilli, S. (2026). Association Between Spinopelvic Alignment and MRI-Based Stenosis Severity According to Schizas Grade in Degenerative Lumbar Spinal Stenosis. Genel Tıp Dergisi, 36(2026), 1-9. https://doi.org/10.54005/geneltip.1903817
AMA
1.Yay MÖ, Akilli S. Association Between Spinopelvic Alignment and MRI-Based Stenosis Severity According to Schizas Grade in Degenerative Lumbar Spinal Stenosis. Genel Tıp Derg. 2026;36(2026):1-9. doi:10.54005/geneltip.1903817
Chicago
Yay, Murat Özcan, ve Süleyman Akilli. 2026. “Association Between Spinopelvic Alignment and MRI-Based Stenosis Severity According to Schizas Grade in Degenerative Lumbar Spinal Stenosis”. Genel Tıp Dergisi 36 (2026): 1-9. https://doi.org/10.54005/geneltip.1903817.
EndNote
Yay MÖ, Akilli S (01 Ekim 2026) Association Between Spinopelvic Alignment and MRI-Based Stenosis Severity According to Schizas Grade in Degenerative Lumbar Spinal Stenosis. Genel Tıp Dergisi 36 2026 1–9.
IEEE
[1]M. Ö. Yay ve S. Akilli, “Association Between Spinopelvic Alignment and MRI-Based Stenosis Severity According to Schizas Grade in Degenerative Lumbar Spinal Stenosis”, Genel Tıp Derg, c. 36, sy 2026, ss. 1–9, Eki. 2026, doi: 10.54005/geneltip.1903817.
ISNAD
Yay, Murat Özcan - Akilli, Süleyman. “Association Between Spinopelvic Alignment and MRI-Based Stenosis Severity According to Schizas Grade in Degenerative Lumbar Spinal Stenosis”. Genel Tıp Dergisi 36/2026 (01 Ekim 2026): 1-9. https://doi.org/10.54005/geneltip.1903817.
JAMA
1.Yay MÖ, Akilli S. Association Between Spinopelvic Alignment and MRI-Based Stenosis Severity According to Schizas Grade in Degenerative Lumbar Spinal Stenosis. Genel Tıp Derg. 2026;36:1–9.
MLA
Yay, Murat Özcan, ve Süleyman Akilli. “Association Between Spinopelvic Alignment and MRI-Based Stenosis Severity According to Schizas Grade in Degenerative Lumbar Spinal Stenosis”. Genel Tıp Dergisi, c. 36, sy 2026, Ekim 2026, ss. 1-9, doi:10.54005/geneltip.1903817.
Vancouver
1.Murat Özcan Yay, Süleyman Akilli. Association Between Spinopelvic Alignment and MRI-Based Stenosis Severity According to Schizas Grade in Degenerative Lumbar Spinal Stenosis. Genel Tıp Derg. 01 Ekim 2026;36(2026):1-9. doi:10.54005/geneltip.1903817


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