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Two children with partial trisomy for 7p
Journal of Medical Genetics
|August 1, 1979
Insights
This study details a family with a balanced translocation between chromosome 7p and 22q. It describes two children with partial trisomy 7p, comparing their features to a prior case.
Area of Science:
- Human Genetics
- Cytogenetics
- Pediatric Medicine
Background:
- Balanced translocations can lead to unbalanced chromosomal segments in offspring.
- Segregation of chromosomal abnormalities requires careful genetic analysis.
- Understanding translocation inheritance patterns is crucial for genetic counseling.
Observation:
- A second family exhibiting a balanced translocation between chromosome 7p and 22q was identified.
- Two children within this family presented with partial trisomy for the 7p region.
- Clinical data from these children were collected and analyzed.
Findings:
- The identified translocation involved specific breakpoints on chromosomes 7p and 22q.
- Partial trisomy 7p resulted in a distinct set of clinical manifestations in the affected children.
- Comparison with a previously reported case highlighted similarities and differences in phenotypic expression.
Implications:
- This case expands the understanding of 7p partial trisomy phenotypes.
- It reinforces the importance of cytogenetic analysis in families with recurrent miscarriages or developmental abnormalities.
- Further research into the specific genes on 7p involved in this trisomy is warranted.
Abstract:
A second family in which a balanced translocation between 7p and 22q is segregating is described. The clinical features of 2 children with a resulting partial trisomy for 7p are described and compared with the previously described case.