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Related Experiment Videos

Partial duplication of distal 17q.

J Bridge, W Sanger, G Mosher

    American Journal of Medical Genetics
    |October 1, 1985
    PubMed
    Summary

    This study identifies a rare chromosomal abnormality, dup(17q), in siblings with multiple congenital anomalies. The findings link specific genetic changes to a distinct pattern of developmental abnormalities.

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    Area of Science:

    • Genetics
    • Developmental Biology
    • Clinical Medicine

    Background:

    • Congenital anomalies represent a significant challenge in pediatric health.
    • Understanding the genetic basis of complex malformation syndromes is crucial for diagnosis and counseling.
    • Duplications of chromosome 17, specifically 17q duplications (dup(17q)), are rare and associated with diverse phenotypes.

    Observation:

    • A male proband and his sister presented with a similar constellation of congenital anomalies.
    • Observed anomalies included facial asymmetry, hypertelorism, micrognathia, webbed neck, polydactyly, hypotonia, and congenital heart defects.
    • The proband exhibited renal anomalies, while the sister had a cleft lip and palate.

    Findings:

    • Genetic analysis revealed a balanced translocation t(17;18)(q25.1;q23)mat in the propositus and a fetus, resulting in dup(17q).
    • The identified chromosomal abnormality, 46,XY, -18, +der(18),t(17;18)(q25.1;q23)mat, is associated with the observed syndromic features.
    • Clinical findings were compared with previously reported cases of dup(17q) to delineate the phenotypic spectrum.

    Implications:

    • This case expands the understanding of the phenotypic variability associated with dup(17q).
    • Accurate genetic diagnosis is essential for predicting prognosis and providing genetic counseling for families.
    • Further research into dup(17q) can improve diagnostic accuracy and therapeutic strategies for affected individuals.

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