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Partial trisomy of the distal segment 14q
Y Nakamura1, K Sakai, S Sakuma
1Department of Medical Technology, St. Mary's Hospital, Kurume-shi, Japan.
Human Genetics
|May 1, 1990
Summary
This study describes a male infant with a rare genetic condition: duplication of the distal 14q chromosome segment. DNA analysis confirmed the extra genetic material, ruling out parental or sibling chromosomal abnormalities.
Area of Science:
- Genetics
- Human Molecular Genetics
- Chromosomal Abnormalities
Background:
- Genetic duplications can lead to developmental abnormalities.
- Accurate identification of chromosomal segments is crucial for understanding genetic disorders.
- Distal chromosome 14q duplication is a rare condition with limited documented cases.
Observation:
- A male infant presented with an extra chromosomal segment.
- Banding techniques initially suggested the segment was from chromosome 14q.
- The extra segment was located at the distal end of the long arm of chromosome 17.
Findings:
- DNA analysis using specific probes confirmed the extra segment was indeed the distal part of chromosome 14q.
- The proband's parents and elder sister were found to have normal karyotypes, indicating the duplication was de novo in the infant.
- This case provides further evidence for the existence and characterization of distal 14q duplication.
Implications:
- This finding contributes to the understanding of rare chromosomal disorders.
- Accurate genetic diagnosis is essential for genetic counseling and potential future therapeutic strategies.
- Further research into the phenotypic effects of distal 14q duplication is warranted.