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Similarities and differences between unilateral and bilateral Perthes' disease.
Andrzej Grzegorzewski1, Marek Synder, Wiesław Szymczak
1Katedra i Klinika Ortopedii i Ortopedii Dzieciecej Uniwersytetu Medycznego, Łódź
Ortopedia, Traumatologia, Rehabilitacja
|July 10, 2007
Summary
Bilateral Perthes disease typically begins 15 months earlier than unilateral cases. Both forms show similar outcomes based on the Stulberg classification, with younger age at onset correlating to better results.
Area of Science:
- Orthopedics
- Pediatric Orthopedics
- Pediatric Rheumatology
Background:
- Perthes disease affects hip joint development in children.
- Understanding differences between unilateral and bilateral presentations is crucial for treatment.
- This study compares clinical characteristics and outcomes of unilateral versus bilateral Perthes disease.
Purpose of the Study:
- To compare unilateral and bilateral Perthes disease.
- To analyze age of onset, incidence, and prognostic factors.
- To evaluate treatment outcomes using established classifications.
Main Methods:
- Retrospective analysis of 261 unilateral and 50 bilateral Perthes disease cases.
- Follow-up from onset to skeletal maturity (mean 13.4 years).
- Assessment of femoral head necrosis (Herring, Catterall) and outcome (Stulberg, Mose).
Main Results:
- Bilateral Perthes disease onset averaged 15 months earlier than unilateral.
- Peak incidence: 6-9 years (unilateral), <6 years (bilateral).
- No significant difference in Stulberg outcomes between unilateral and bilateral groups; younger onset correlated with better outcomes.
Conclusions:
- Age at onset differs significantly between unilateral and bilateral Perthes disease.
- Stulberg classification shows comparable outcomes for both forms.
- Early onset is a key factor for better prognosis in Perthes disease.
