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Long survival in a 69,XXY triploid male
American Journal of Medical Genetics
|October 1, 1986
Insights
This report details the longest survival of an infant with a 69,XXY chromosome condition. The extra chromosome was maternally inherited, offering insights into rare genetic disorders.
Area of Science:
- Genetics
- Pediatrics
- Reproductive Biology
Background:
- The 69,XXY chromosome constitution, a rare aneuploidy, is typically associated with severe developmental abnormalities and limited survival.
- Understanding the origins and natural history of such chromosomal abnormalities is crucial for genetic counseling and clinical management.
Observation:
- A male infant with a 69,XXY karyotype achieved a survival of 10.5 months, significantly longer than previously reported cases.
- This extended survival may be attributed to advancements in managing prematurity and respiratory illnesses in neonates.
Findings:
- Genotyping confirmed the extra X and Y chromosome set originated from the maternal genome.
- This finding provides valuable data on the maternal contribution to polyploidy.
Implications:
- This case highlights the potential for improved outcomes in rare chromosomal disorders with comprehensive medical care.
- The data underscores the importance of considering maternal factors in the etiology of aneuploidies.
- Enhanced understanding of long-term survival in 69,XXY patients can inform genetic counseling and support for affected families.
Abstract:
We report on an infant with a 69,XXY chromosome constitution who survived for 10 1/2 months; this is the longest survival reported with this condition to date. The infrequency of this disorder, data on natural history, and improved survival, possibly due to better management of respiratory illness and prematurity, are all factors worth noting in counseling on such rare conditions. Genotyping demonstrated the extra genome to be of maternal origin.