Related Experiment Videos
Congenital heart defect in a patient with deletion of chromosome 7q
G E Tiller1, M S Watson, L M Duncan
1Edward Mallinckrodt Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110.
Insights
This study details a premature infant with a 7q terminal deletion, experiencing low birth weight, facial anomalies, and a rare complex congenital heart defect. The findings highlight the spectrum of cardiac issues associated with chromosome 7 deletions.
Area of Science:
- Genetics
- Developmental Biology
- Pediatrics
Background:
- Terminal deletions of chromosome 7q are rare genetic events.
- Congenital heart defects are a significant cause of infant mortality.
- Understanding genotype-phenotype correlations is crucial for genetic disorders.
Observation:
- A premature male infant presented with a terminal deletion of 7q (pter----q34).
- Clinical manifestations included low birth weight, hypertelorism, bilateral cleft lip and palate, and cryptorchidism.
- A complex congenital heart defect was diagnosed, featuring main pulmonary artery hypoplasia, absent pulmonary valve, ventricular septal defect, and anomalous right pulmonary artery.
Findings:
- The infant's phenotype is consistent with known features of 7q deletions.
- The specific complex congenital heart defect observed is unusual for this genetic condition.
- This case expands the known spectrum of cardiac anomalies associated with chromosome 7 deletions.
Implications:
- This case underscores the variability and severity of phenotypes associated with 7q terminal deletions.
- Further research is needed to elucidate the specific genetic mechanisms underlying the observed complex heart defect.
- Improved understanding can aid in genetic counseling and clinical management of affected individuals.
Abstract:
We describe a premature male infant with a terminal deletion of 7q [del(7) (pter----q34:)]. Manifestations include low birth weight, hypertelorism, bilateral cleft lip and palate, cryptorchidism, and a complex congenital heart defect. The latter consisted of hypoplasia of the main pulmonary artery, absent pulmonary valve, ventricular septal defect, and anomalous right pulmonary artery. We briefly review the spectrum of heart defects seen with chromosome 7 deletions, and comment on the incidence of this unusual heart lesion.