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Newly recognized autosomal dominant disorder with craniosynostosis
M L Warman1, J B Mulliken, P G Hayward
1Division of Genetics, Children's Hospital, Harvard Medical School, Boston, Massachusetts.
American Journal of Medical Genetics
|June 1, 1993
Summary
A newly identified autosomal dominant craniosynostosis disorder presents with varied skull abnormalities and associated neurological issues, but normal intelligence. This large, high-penetrance family is ideal for identifying the genetic cause of craniofacial development.
Area of Science:
- Genetics
- Developmental Biology
- Neurology
Background:
- Craniosynostosis, the premature fusion of skull sutures, can lead to significant cranial deformities and associated health problems.
- Several syndromic forms of craniosynostosis exist, each with characteristic features.
- Accurate diagnosis and genetic understanding are crucial for patient management and research.
Purpose of the Study:
- To describe a novel form of autosomal dominant craniosynostosis.
- To differentiate this new disorder from previously described syndromic craniosynostoses.
- To identify potential genetic loci involved in craniofacial development.
Main Methods:
- Clinical evaluation of an affected family.
- Detailed phenotypic assessment, including cranial imaging and neurological examinations.
- Exclusion of known craniosynostosis syndromes based on clinical presentation.
Main Results:
- A family with a newly recognized autosomal dominant craniosynostosis disorder was identified.
- The condition exhibits high penetrance and variable expression, with cranial abnormalities ranging from fronto-orbital recession to clover-leaf skull.
- Associated symptoms include headache, vision impairment, and seizures; intelligence remains normal.
- The disorder does not fit established syndromic designations due to the absence of specific features like midfacial hypoplasia or limb anomalies.
Conclusions:
- This newly identified craniosynostosis represents a distinct clinical entity.
- The large family size and high penetrance make it a strong candidate for positional cloning to identify novel genes in craniofacial development.
- Further genetic investigation is warranted to elucidate the underlying molecular mechanisms.