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Midface Hypoplasia and Cranial Base Morphology in Syndromic Craniosynostosis: A Comparative Analysis Study Using a Predictive Regression Model
08:03

Midface Hypoplasia and Cranial Base Morphology in Syndromic Craniosynostosis: A Comparative Analysis Study Using a Predictive Regression Model

Published on: November 4, 2025

A boy with severe craniodiaphyseal dysplasia and apparently normal mother

Tadeusz Bieganski1, Dobromila Baranska, Irmina Miastkowska

  • 1Department of Paediatric Radiology, Medical University, Lodz, Poland, and Department of Medical Imaging, New Children's Hospital, Sydney, Australia.

American Journal of Medical Genetics. Part A
|September 14, 2007
PubMed

Insights

Craniodiaphyseal dysplasia (CDD) is a severe bone disorder. This case study highlights a mother with potential somatic mosaicism for CDD, presenting milder symptoms than her severely affected son.

Area of Science:

  • Genetics
  • Pediatrics
  • Radiology

Background:

  • Craniodiaphyseal dysplasia (CDD) is a rare autosomal recessive disorder characterized by progressive osteosclerosis and hyperostosis.
  • The condition typically presents in childhood with characteristic facial and cranial deformities, hearing loss, and visual impairment.

Observation:

  • A boy presented with severe congenital osteosclerosis, facial diplegia, hearing loss, and optic nerve atrophy, indicative of a severe CDD phenotype.
  • At age 7, the boy developed progressive genu valgum and radiographic findings suggestive of secondary hyperparathyroidism, confirmed biochemically.

Findings:

  • The boy's mother, asymptomatic but with facial similarities, showed cranial osteosclerosis and hyperostosis on skeletal survey.
  • These findings in the mother suggest the possibility of somatic mosaicism for the genetic mutation causing CDD.

Implications:

  • This case expands the understanding of CDD's phenotypic variability and potential for mosaicism.
  • Recognizing milder presentations and mosaicism is crucial for accurate diagnosis and genetic counseling in families with CDD.

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