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Another TWIST on Baller-Gerold syndrome
1Department of Pediatrics, Division of Genetics and Development, University of Washington, 1959 NE Pacific Street, Seattle, WA 98195-620, USA.
American Journal of Medical Genetics
|December 26, 2001
Summary
Baller-Gerold syndrome, typically recessive, may be dominantly inherited due to TWIST gene mutations. This study confirms paternal transmission of a novel TWIST mutation, suggesting overlap with Saethre-Chotzen syndrome.
Area of Science:
- Genetics
- Developmental Biology
- Medical Genetics
Background:
- Baller-Gerold syndrome (BGS) presents with craniosynostosis and upper limb malformations, often with other anomalies.
- Historically, BGS was presumed to have autosomal recessive inheritance.
- Recent evidence suggests autosomal dominant inheritance with variable expressivity.
Observation:
- A patient with craniosynostosis (coronal, metopic, sagittal sutures) and bilateral radial ray hypoplasia was studied.
- The patient exhibited features common to Saethre-Chotzen syndrome (SCS), including specific ear and cervical anomalies.
- The father presented with mild SCS features.
Findings:
- A novel missense mutation in the TWIST gene's Helix II domain was identified.
- This mutation was directly transmitted from the father to the patient, confirming paternal inheritance.
- The identified mutation provides further support for dominant inheritance patterns in BGS.
Implications:
- This case supports recent findings linking BGS to autosomal dominant inheritance via TWIST mutations.
- Further TWIST mutational analysis is needed to clarify if BGS is a distinct entity or a form of SCS.
- Understanding the genetic basis of BGS and SCS aids in diagnosis and genetic counseling.