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Related Experiment Videos

Down's syndrome with X0/XY mosaicism.

C Y Yeung, L Yang

    Acta Paediatrica Scandinavica
    |May 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    This study presents a rare case of a Chinese infant with Down syndrome and X0/XY mosaicism, exhibiting classical Down syndrome features and incomplete masculinization due to mosaicism.

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    Area of Science:

    • Genetics
    • Pediatrics
    • Endocrinology

    Background:

    • Down syndrome (Trisomy 21) is a genetic disorder.
    • X0/XY mosaicism involves a mix of sex chromosome complements.
    • Mixed gonadal dysgenesis is a disorder of sexual development.

    Observation:

    • A 5-month-old Chinese infant presented with classical Down syndrome features.
    • The infant also exhibited X0/XY mosaicism, leading to incomplete masculinization.
    • Somatic effects included a short phallus, hypospadias, bifid scrotum, urogenital sinus, and bilateral extra-abdominal testes.

    Findings:

    • The patient displayed classical Down syndrome phenotype.
    • Somatic features indicated incomplete masculinization due to X0/XY mosaicism.
    • Absence of internal female organs and Turner's syndrome signs distinguished this case.

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    Implications:

    • This case highlights the complex interplay of genetic disorders.
    • Understanding such presentations is crucial for diagnosing and managing disorders of sexual development.
    • Further research into mixed gonadal dysgenesis and chromosomal abnormalities is warranted.