Related Experiment Videos
Mosaic variegated aneuploidy with microcephaly: a new human mitotic mutant?
D Warburton1, K Anyane-Yeboa, P Taterka
1Department of Pediatrics, Columbia University, New York, NY 10032.
Annales De Genetique
|January 1, 1991
Summary
This study details a rare genetic condition in a 17-year-old girl exhibiting mosaic variegated aneuploidy with microcephaly. Multiple tissues showed widespread trisomies, indicating significant mitotic instability and a potential new syndrome.
Area of Science:
- Genetics
- Cell Biology
- Developmental Biology
Background:
- Mosaic variegated aneuploidy is a rare chromosomal instability syndrome.
- Characterized by aneuploidy in multiple cell types and tissues.
- Often associated with developmental abnormalities.
Observation:
- A 17-year-old female presented with severe microcephaly and mental retardation.
- Karyotype analysis revealed trisomy in over 10% of cells across lymphocytes, fibroblasts, bone marrow, and lymphoblasts.
- Observed trisomies involved numerous chromosomes, with tissue-specific variations in predominant trisomies.
Findings:
- The widespread presence of trisomies in multiple tissues over three years suggests a genetic cause for mitotic instability.
- This case expands the known spectrum of mosaic variegated aneuploidy.
- Clinical and cytogenetic heterogeneity exists among reported cases.
Implications:
- The term "mosaic variegated aneuploidy with microcephaly" is proposed for this syndrome.
- Further research is needed to clarify the genetic basis and delineate distinct clinical entities.
- Understanding this condition can aid in genetic counseling and diagnosis for similar cases.