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Related Experiment Videos

Constitutional del(5)(q23.3q31.1).

H Rivera1, L Garcia-Esquivel, M Moller

  • 1División de Genética, Unidad de Investigación Biomédica, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco.

Annales De Genetique
|January 1, 1987
PubMed
Summary
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A genetic deletion on chromosome 5, specifically del(5)(q23.3q31.1), is linked to a distinct set of developmental issues in infants. This finding helps in understanding congenital disorders and their genetic underpinnings.

Area of Science:

  • Human Genetics
  • Developmental Biology
  • Clinical Genetics

Background:

  • Genetic abnormalities are a significant cause of congenital disorders.
  • Chromosome 5 deletions can lead to a range of developmental challenges.
  • Understanding specific deletion syndromes aids in diagnosis and management.

Observation:

  • A 4-month-old male infant presented with muscular hypotonia.
  • Additional symptoms included growth and psychomotor retardation, dysmorphic features (large low-set ears), hypoplastic genitalia, hip luxation, and bilateral equinovarus.
  • Genetic analysis revealed a constitutional karyotype of 46,XY,del(5)(q23.3q31.1).

Findings:

  • The specific chromosomal deletion del(5)(q23.3q31.1) was identified as the genetic cause.
  • Comparison with 12 similar cases suggests a characteristic clinical phenotype associated with this deletion.

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  • The identified phenotype includes a constellation of developmental and physical abnormalities.

    • Implications:

    • This study contributes to the delineation of a specific deletion syndrome on chromosome 5.
    • The findings can aid clinicians in diagnosing similar cases and provide genetic counseling.
    • Further research into the genes within the deleted region may elucidate specific disease mechanisms.