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The 22q11.2 deletion syndrome.
B S Emanuel1, D McDonald-McGinn, S C Saitta
1University of Pennsylvania School of Medicine, and The Children's Hospital of Philadelphia, USA.
Advances in Pediatrics
|August 2, 2001
Summary
The 22q11.2 deletion, affecting 1 in 4000 births, encompasses DiGeorge and velocardiofacial syndromes. This chapter details its varied clinical features, evaluation, and molecular genetic underpinnings.
Area of Science:
- Genetics
- Molecular Biology
- Pediatrics
Background:
- 22q11.2 deletion syndrome is a common genetic disorder affecting approximately 1 in 4000 live births.
- It is recognized as the underlying cause for DiGeorge syndrome, velocardiofacial syndrome, and conotruncal anomaly face syndrome, indicating they are phenotypic variations of the same condition.
- The clinical manifestations of 22q11.2 deletion syndrome are diverse and highly variable among affected individuals.
Purpose of the Study:
- To provide a comprehensive overview of 22q11.2 deletion syndrome.
- To emphasize the clinical findings and outline an approach for patient evaluation.
- To present the current molecular understanding of the genomic mechanisms and genes involved in this condition.
Main Methods:
- Review of existing literature and clinical data.
- Analysis of genetic and molecular findings.
- Clinical case study examples (implied).
Main Results:
- The 22q11.2 deletion is a significant genetic disorder with a wide spectrum of clinical presentations.
- Established link between 22q11.2 deletion and multiple named syndromes.
- Identified key genomic regions and genes implicated in the syndrome's pathogenesis.
Conclusions:
- 22q11.2 deletion syndrome is a frequent genetic condition with variable expressivity.
- A thorough clinical evaluation is crucial for diagnosing and managing affected patients.
- Further research into the molecular basis is essential for understanding and potentially treating the disorder.