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Published on: February 10, 2026
Triple major curves in children
Darin Davidson1, Mervyn Letts, James Jarvis
1Division of Orthopaedics, Children's Hospital of Eastern Ontario, University of Ottawa, Ottawa, Ont.
Insights
Idiopathic triple scoliosis curves, previously unclassified, were studied in 13 children. Most cases were managed non-surgically, indicating this curve pattern
Area of Science:
- Orthopedics
- Spinal Surgery
- Pediatric Spine Conditions
Background:
- Current scoliosis classification systems primarily focus on etiology or curve pattern.
- Idiopathic triple curves have traditionally been excluded from these classifications.
- This exclusion limits comprehensive understanding and management strategies for this specific spinal deformity.
Purpose of the Study:
- To investigate the characteristics and management of idiopathic triple scoliosis curves.
- To advocate for the inclusion of triple curves in existing scoliosis classification systems.
- To provide data on the clinical course and treatment outcomes for this underrepresented scoliosis pattern.
Main Methods:
- Retrospective review of pediatric patients with idiopathic triple scoliosis (1988-2001).
- Inclusion criteria: triple curve with 3 structural segments, scoliosis >10 degrees.
- Management strategies included observation, bracing (curve >20 degrees), or surgery (curves >45-50 degrees).
Main Results:
- Thirteen children (9 female, 4 male) were identified with idiopathic triple scoliosis.
- Average age at diagnosis was 13 years, 9 months; average follow-up was 3 years, 6 months.
- One patient underwent spinal fusion; others were managed with observation (10) or bracing (2).
Conclusions:
- Idiopathic triple major curves represent a distinct pattern that warrants inclusion in scoliosis classifications.
- Current management approaches suggest non-surgical interventions are often effective.
- Further research and classification integration are needed for optimal patient care.
Introduction:
The predominant classification systems for scoliosis have been based either on etiology or curve pattern. Traditionally triple curves have not been included in either classification system.
Methods:
We reviewed the records of all children with an idiopathic triple scoliotic curve seen between 1988 and 2001 at the Children's Hospital of Eastern Ontario, Ottawa, a major pediatric referral centre. The triple curve had 3 structural curved segments in accordance with the classification of Lenke and associates. Scoliosis was defined by a curve greater than 10 degrees, and the apical vertebra was determined according to Scoliosis Research Society guidelines. Laterality of the curve was determined from the curve with the greatest magnitude. Curve progression was an increase in magnitude of at least 5 degrees. Management included observation, with bracing if any curve progressed to greater than 20 degrees. Surgery was reserved for curves that were unstable, rapidly progressive and greater than 45 degrees-50 degrees.
Results:
Thirteen children (9 girls, 4 boys) were treated for a triple scoliosis curve. The average age at the time the triple curve developed was 13 years and 9 months (range from 9 yr 1 mo-17 yr 5 mo). The average follow-up was 3 years and 6 months (range from 1-11 yr). One child required spinal fusion, and 6 years postoperatively the curve was stable with a good fusion mass. Of the remaining children, 2 were treated with an orthosis and 10 with observation.
Conclusion:
The triple major curve is a neglected curve pattern that should be included in classifications of scoliosis.
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