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The sacroiliac joint across ages - what is normal?
Anne Grethe Jurik1, Nele Herregods2
1Department of Radiology, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, Aarhus N 8200, Denmark.
Therapeutic Advances in Musculoskeletal Disease
|April 1, 2024
Summary
Understanding normal sacroiliac joint (SIJ) anatomy and variations is crucial for accurate diagnosis. This review details typical SIJ findings across all ages to prevent misinterpreting normal changes as pathology.
Area of Science:
- Radiology
- Anatomy
- Orthopedics
Background:
- The sacroiliac joint (SIJ) exhibits significant anatomical variability.
- Non-inflammatory changes and physiological maturation can mimic pathology on imaging.
- Accurate interpretation requires knowledge of normal variations.
Purpose of the Study:
- To review current knowledge on normal sacroiliac joint findings.
- To aid in differentiating normal variations from pathological conditions.
- To provide a comprehensive guide for all age groups.
Main Methods:
- Literature review of anatomical and imaging studies.
- Synthesis of data on SIJ variations and age-related changes.
- Focus on magnetic resonance imaging (MRI) findings.
Main Results:
- SIJ anatomy shows considerable inter- and intra-individual variation.
- Bone marrow edema, sclerosis, and fat deposition can represent normal findings.
- Skeletal maturation impacts SIJ appearance in pediatric populations.
Conclusions:
- A thorough understanding of normal SIJ anatomy and variations is essential for accurate diagnosis.
- This knowledge helps prevent misdiagnosis of inflammatory sacroiliac joint conditions.
- This review serves as a reference for normal SIJ imaging findings throughout life.
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