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The pediatric accessory sacroiliac joint: does it exist?
Allison Rixey1, Naveen Murthy1, Kimberly Amrami1
1Mayo Clinic, 200 1st St. SW, Rochester, MN, 55905, USA.
Skeletal Radiology
|September 13, 2020
Summary
The accessory sacroiliac joint was not found in children. However, age-related changes in sacroiliac joint curvature may increase the risk of developing this joint later in life.
Area of Science:
- Pediatric radiology
- Anatomy
- Skeletal development
Background:
- The accessory sacroiliac joint is a rare anatomical variant.
- Its presence and development in the pediatric population remain unclear.
Purpose of the Study:
- To determine the prevalence of accessory sacroiliac joints in pediatric patients.
- To describe sacroiliac joint morphology that might predispose to accessory joint formation.
Main Methods:
- Review of 178 high-resolution pelvic CT scans from patients aged 0-15 years.
- Stratification by age and gender.
- Detailed assessment of sacroiliac joint morphology, including curvature.
Main Results:
- No accessory sacroiliac joints were identified in the pediatric cohort.
- Sacroiliac joint curvature, in the typical accessory joint location, increased in severity and prevalence with age.
Conclusions:
- The pediatric accessory sacroiliac joint is likely not a congenital variant present at birth.
- Age-related sacroiliac joint curvature may predispose to accessory joint formation in adulthood.
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