Evidence map›Paper›PMID 42154298›Full record

ArticleSurgical and radiologic anatomy : SRA2026

Computed tomography-based assessment of sacroiliac joint variations: associations with sacral types, sex, and side.

Sümeyra Dogmus, Ismihan Ilknur Uysal, Pınar Diydem Yılmaz, Ozlem Arık

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Article in Surgical and radiologic anatomy : SRA, 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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4 authors.

Sümeyra DogmusDepartment of Anatomy, PhD Program, Institute of Health Sciences, Necmettin Erbakan University, Konya, Turkey.
Ismihan Ilknur UysalDepartment of Anatomy, Faculty of Medicine, Necmettin Erbakan University, Konya, Turkey. uysali@yahoo.com.
Pınar Diydem YılmazDepartment of Radiology, Faculty of Medicine, Necmettin Erbakan University, Konya, Turkey.
Ozlem ArıkDepartment of Biostatistics and Medical Informatics, Necmettin Erbakan University, Konya, Turkey.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo evaluate sacroiliac joint (SIJ) variations and to examine their associations with sacral morphology types across sex and side using computed tomography.

methodsThis retrospective study included computed tomography images of 400 adults (200 females, 200 males). Sacral morphology was classified on sagittal images based on the presence and morphology of the S1-S2 intervertebral disc. SIJ variations were identified on corresponding axial images. The distribution of SIJ variations according to sex and side and their associations with sacral types were analyzed.

resultsSIJ variations were observed in 43% of individuals with type 1 sacrum, 41% of those with type 2 sacrum, and 25% of those with type 3 sacrum. Overall, variations were detected 60.5% of females and 25.5% of males, indicating a significantly higher prevalence in females. Most variations demonstrated bilateral involvement. The accessory SIJ was the most frequent variation, followed by the iliosacral complex and semicircular defect. Sacral morphology was predominantly type 1, followed by type 2, with a significant sex-related difference in distribution. Although SIJ variations were observed across different sacral types, no clear linear association with sacral morphology was identified.

conclusionSIJ variations are common, predominantly bilateral, and more frequently observed in females, supporting a mechanical rather than inflammatory origin. The high prevalence of accessory SIJ highlights its importance as a potential source of diagnostic confusion in SIJ imaging. Combined evaluation of sacral morphology and SIJ variations provides an integrated anatomical framework that improve radiological interpretation and reduce diagnostic uncertainty in clinical practice.

Indexed as

Anatomic VariationSacroiliac JointSacrumAdultAgedFemaleHumansMaleMiddle AgedRetrospective StudiesSex FactorsTomography, X-Ray ComputedYoung AdultAnatomical variationsComputed tomographySacral morphologySacroiliac joint

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