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Acephalus-acardia in twins with aneuploidy
C A Moore1, B A Buehler, B M McManus
1Department of Medical Genetics, Indiana University School of Medicine, Indianapolis.
American Journal of Medical Genetics. Supplement
|January 1, 1987
Summary
Aneuploidy, a chromosomal abnormality, is frequently observed in acardiac twins. Chromosome analysis of both twins is recommended when one exhibits acephalus-acardia.
Area of Science:
- Genetics
- Reproductive Medicine
- Developmental Biology
Background:
- Acardiac twinning is a rare complication of monochorionic pregnancy.
- Cytogenetic analysis of acardiac twins and their co-twins provides insights into the genetic underpinnings of this condition.
Observation:
- Previous reports documented aneuploidy in 7 of 11 acardiac twins and 1 co-twin.
- This study presents 2 new cases of aneuploidy associated with acephalus-acardia.
- In both new cases, the co-twin exhibited a Klinefelter (47,XXY) karyotype.
Findings:
- One acardiac twin showed a 47,XXY constitution.
- The other acardiac twin presented a 94,XXXXYY anomaly.
- One co-twin also displayed VATER association, a complex of congenital anomalies.
Implications:
- These findings reinforce the association between aneuploidy and acephalus-acardia.
- Chromosome analysis of both twins in such cases is crucial for accurate diagnosis and genetic counseling.
- Further research into the genetic mechanisms of acardiac twinning is warranted.