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Endocrine abnormalities in a patient with partial trisomy 4q.

M A Angulo, M Castro-Magana, J Sherman

    Journal of Medical Genetics
    |August 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

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    This study details a rare genetic condition, partial trisomy 4q, in a male patient. Findings reveal significant endocrine abnormalities, including hyperinsulinaemia and hypothyroidism, offering new insights into this chromosomal disorder.

    Area of Science:

    • Genetics
    • Endocrinology
    • Human Chromosome Abnormalities

    Background:

    • Partial trisomy of chromosome 4q, often arising from familial translocations, is a recognized genetic condition.
    • This report focuses on a unique case of de novo unbalanced translocation involving the distal segment of chromosome 4q.

    Observation:

    • A 16-year-old male with 46,XY,12q+ karyotype presented with mental retardation.
    • Genetic analysis confirmed a de novo unbalanced translocation involving the distal portion of the long arm of chromosome 4 (4q).

    Findings:

    • The patient exhibited severe endocrine dysfunction, including extreme hyperinsulinaemia, primary hypothyroidism, and hypergonadotropic hypogonadism.
    • Notably, no autoimmune markers were detected, suggesting non-autoimmune mechanisms for the endocrine resistance.

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    Implications:

    • This case expands the understanding of clinical phenotypes associated with partial trisomy 4q.
    • The endocrine findings represent the first reported evaluation in patients with this specific chromosomal abnormality, highlighting potential end-organ resistance.
    • Further research is warranted to elucidate the mechanisms underlying these endocrine disruptions in partial trisomy 4q.