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Balanced t(6;8)(6p8p;6q8q) and the CHARGE association
J A Hurst1, P Meinecke, M Baraitser
1Department of Clinical Genetics, Hospital for Sick Children, London.
Journal of Medical Genetics
|January 1, 1991
Summary
This case study details a girl diagnosed with CHARGE association, a rare genetic disorder. The study highlights a unique chromosomal translocation (6;8) as a potential contributing factor in this patient.
Area of Science:
- Genetics
- Pediatrics
- Ophthalmology
Background:
- CHARGE association is a complex genetic disorder with variable expressivity.
- It presents with a constellation of congenital anomalies affecting multiple organ systems.
- Early diagnosis and genetic evaluation are crucial for affected individuals.
Observation:
- A pediatric patient presented with bilateral retinal colobomata, Fallot's tetralogy, choanal atresia, external ear abnormalities, sensorineural deafness, facial nerve palsy, and tracheo-oesophageal fistula.
- Clinical diagnosis of CHARGE association was established.
- The patient exhibited an apparently balanced whole arm translocation between chromosomes 6 and 8.
Findings:
- The identified chromosomal translocation (6;8) represents a novel genetic finding in a CHARGE association case.
- Parental karyotypes were normal, suggesting a de novo translocation in the affected child.
- This case expands the known genetic spectrum associated with CHARGE association.
Implications:
- Understanding the genetic underpinnings of CHARGE association, including chromosomal abnormalities, is vital for accurate diagnosis and genetic counseling.
- This finding may prompt further research into the role of chromosomal translocations in CHARGE association.
- Further investigation is warranted to determine the functional impact of this specific translocation on gene expression and developmental pathways.