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Hip Instability in Down Syndrome: A Focus on Acetabular Retroversion
Oussama Abousamra1, Ilhan A Bayhan, Kenneth J Rogers
1Department of Orthopedics, Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE.
Journal of Pediatric Orthopedics
|April 19, 2015
Summary
Children with Down syndrome (DS) exhibit varied acetabular anteversion, with no significant difference between those with and without hip instability. Surgical hip reconstruction in DS patients yielded positive intermediate-term outcomes.
Area of Science:
- Orthopedic surgery
- Pediatric orthopedics
- Genetics
Background:
- Down syndrome is associated with hip instability.
- Acetabular anteversion is a key factor in hip development and stability.
Purpose of the Study:
- To compare acetabular anteversion in children with Down syndrome (DS) with and without hip instability.
- To report surgical outcomes for unstable hips in children with DS.
Main Methods:
- Retrospective review of children with DS (2004-2014) with available imaging.
- Comparison of acetabular anteversion between stable and unstable hips.
- Analysis of demographic, clinical, and radiographic data for surgically treated patients.
Main Results:
- No significant difference in acetabular anteversion between children with DS with or without hip instability.
- Surgical reconstruction for 17 hips in 12 patients showed significant improvement in radiographic measurements.
- Reduced Shenton's line disruption post-surgery, with low complication rates.
Conclusions:
- Acetabular anteversion varies widely in children with Down syndrome.
- Hip reconstruction in children with DS can achieve good intermediate-term results with low complication rates.

