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Midface Hypoplasia and Cranial Base Morphology in Syndromic Craniosynostosis: A Comparative Analysis Study Using a Predictive Regression Model
Published on: November 4, 2025
Cranial base abnormalities in osteogenesis imperfecta: phenotypic and genotypic determinants.
Moira S Cheung1, Heidi Arponen, Peter Roughley
1Genetics Unit, Shriners Hospital for Children, Montreal, Quebec, Canada.
Summary
Osteogenesis imperfecta (OI) patients with lower height Z-scores, indicating more severe disease, have a higher risk of cranial base abnormalities. Bisphosphonate treatment did not show a protective effect against these OI complications.
Area of Science:
- Genetics and Molecular Biology
- Pediatric Endocrinology
- Skeletal Dysplasias
Background:
- Osteogenesis imperfecta (OI) is a rare genetic disorder characterized by bone fragility, often caused by mutations in collagen type I genes.
- Cranial base abnormalities are a significant clinical complication in OI patients, impacting growth and development.
- Understanding the factors contributing to cranial base abnormalities is crucial for managing OI patients.
Purpose of the Study:
- To identify clinical characteristics associated with cranial base abnormalities in patients with osteogenesis imperfecta.
- To investigate the relationship between genotype, clinical severity (height Z-score), and the presence of skull base abnormalities in OI.
- To evaluate the potential protective effect of bisphosphonate treatment on cranial base abnormalities in OI.
Main Methods:
- Cephalometric analysis was performed on 187 OI patients and compared with 191 healthy controls.
- Multivariate logistic regression was used to determine independent predictors of skull base abnormalities, including height Z-score, age, gender, and bisphosphonate treatment history.
- Genotype-phenotype correlations were examined in 140 OI patients with identified mutations in COL1A1 or COL1A2 genes.
Main Results:
- Twenty-two percent of OI patients exhibited at least one abnormal skull base measurement.
- A lower height Z-score was identified as a significant independent predictor of skull base abnormalities in OI patients (OR = 0.53, p < 0.001).
- Bisphosphonate treatment did not demonstrate a protective effect against cranial base abnormalities, even in severely affected patients (height Z-score < -3).
Conclusions:
- Clinical severity of osteogenesis imperfecta, as indicated by height Z-score, is the primary predictor of cranial base abnormalities.
- The type of collagen type I mutation was not independently associated with the prevalence of skull base abnormalities.
- Current findings do not support a protective role for bisphosphonate treatment against the development of cranial base abnormalities in OI.
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