June 2, 2026 · Journal of pediatric orthopedics · DOI: 10.1097/BPO.0000000000003357

Reconsidering the Interpretation of Migration Percentage in Cerebral Palsy: The Role of Age-related Skeletal Maturation

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The authors aimed to evaluate the correlation between bony migration percentage (bMP) and a new measure, cartilaginous migration percentage (cMP), in children with cerebral palsy, considering the impact of age-related skeletal maturation. Their findings indicate a strong correlation between bMP and cMP, but highlight that bMP tends to overestimate cMP, particularly in younger children, suggesting that clinicians should account for this maturation-related bias when interpreting bMP in hip evaluations.

Ryota Tachibana, Kazuka Yamamoto, Hiroshi Tanaka, Junichi Ito, Keisuke Kosaki

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