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Craniosynostosis in cherubism.

M Stiller¹, M Urban, W Golder

¹Department of Dental, Oral and Maxillofacial Surgery, Free University of Berlin, Germany.

American Journal of Medical Genetics

|February 24, 2001

Summary

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This study details a rare genetic disorder, cherubism, affecting jawbones. Researchers identified a new family with cherubism, noting associated craniosynostosis and finger clubbing in some members.

Area of Science:

Genetics
Skeletal Dysplasias
Craniofacial Development

Background:

Cherubism is a rare autosomal dominant fibro-osseous disorder primarily affecting the maxilla and mandible.
Extracranial skeletal involvement is uncommon in cherubism.
Understanding the genetic basis of cherubism is crucial for diagnosis and management.

Observation:

A three-generation family with cherubism was studied, including males across different age groups.
The youngest affected individual, a 4-month-old male, presented with cherubism and craniosynostosis.
Affected father and grandfather exhibited cherubism, finger clubbing, and other skeletal anomalies.

Findings:

Cherubism was genetically mapped to chromosome region 4p16.
The presence of craniosynostosis in the youngest patient led to the exclusion of the FGFR3 gene as a candidate.

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This suggests a distinct genetic etiology for cherubism, potentially involving novel genes or pathways.

Implications:

The findings contribute to the genetic mapping of cherubism, narrowing down the chromosomal region.
Exclusion of FGFR3 due to craniosynostosis highlights the complexity and potential heterogeneity of cherubism.
Further research is needed to identify the specific gene(s) responsible for cherubism and its associated phenotypes.