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Related Experiment Videos

Familial partial duplication (1)(p21p31)

L Hoechstetter1, S Soukup, E K Schorry

  • 1Division of Human Genetics, Children's Hospital Research Foundation, Cincinnati, Ohio 45229-3039, USA.

American Journal of Medical Genetics
|November 20, 1995
PubMed
Summary

A rare chromosome abnormality, partial duplication 1p (1)(p21p31), was identified in a woman with developmental delays and physical anomalies. This genetic condition, linked to maternal insertion, is further explored in this case review.

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Area of Science:

  • Genetics
  • Human Genetics
  • Clinical Genetics

Background:

  • Genetic duplications can lead to developmental abnormalities.
  • Chromosome 1 abnormalities, specifically duplications of the short arm (1p), are rare and associated with specific phenotypes.
  • Understanding chromosomal imbalances is crucial for diagnosing genetic disorders.

Observation:

  • A 30-year-old woman presented with mental retardation, cleft palate, and multiple minor anomalies.
  • Karyotyping revealed a partial duplication of chromosome 1, specifically (1)(p21p31).
  • The duplication resulted from a maternal direct insertion (13,1)(q22p21p31).

Findings:

  • The identified partial duplication 1p (1)(p21p31) is associated with a distinct set of congenital anomalies.

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  • Two deceased relatives with similar symptoms were presumed to have the same chromosomal imbalance, suggesting familial inheritance.
  • Review of existing literature on Duplication 1p cases provides context for this specific finding.

    • Implications:

    • This case highlights the importance of cytogenetic analysis in individuals with unexplained developmental delays and congenital anomalies.
    • The findings contribute to the understanding of genotype-phenotype correlations in partial 1p duplication syndromes.
    • Further research into rare chromosomal imbalances like Duplication 1p is essential for improved genetic counseling and diagnostic approaches.