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Related Experiment Videos

Partial trisomy 15q1

R A Pfeiffer, E Kessel

    Human Genetics
    |July 7, 1976
    PubMed
    Summary
    This summary is machine-generated.

    A supernumerary extra chromosome of maternal origin was identified in a boy with severe developmental and seizure disorders, suggesting a specific trisomy 15q1 phenotype. This finding supports the role of chromosomal rearrangements in causing distinct genetic syndromes.

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    Area of Science:

    • Human Genetics
    • Cytogenetics
    • Pediatric Neurology

    Background:

    • Understanding chromosomal abnormalities is crucial for diagnosing genetic disorders.
    • Trisomy 15q, a partial duplication of chromosome 15, can lead to various developmental issues.

    Observation:

    • A case study of a mentally defective boy with severe convulsive disorder revealed a supernumerary extra chromosome of maternal origin.
    • QM- and C-banding patterns precisely identified the extra chromosome as trisomy 15q1.

    Findings:

    • The observed phenotype in the boy is consistent with a specific form of trisomy 15q1.
    • A tertiary trisomy in two siblings, resulting from a maternal balanced reciprocal translocation t(8q+15q--), further supports the link between chromosomal rearrangements and distinct phenotypes.

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    Implications:

    • This case highlights the phenotypic variability associated with partial trisomy 15q.
    • The findings underscore the importance of detailed cytogenetic analysis in identifying the genetic basis of complex congenital malformation syndromes and neurological disorders.