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[Ring chromosome 13 and multiple malformations (author's transl)]

J Antich, J Plaza, E Geán

    Anales Espanoles De Pediatria
    |November 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

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    A male infant presented with a rare ring chromosome 13, exhibiting severe developmental delays and distinct facial features. This case aligns with clinical characteristics of the 13q deletion syndrome, highlighting genetic disorder complexities.

    Area of Science:

    • Genetics
    • Clinical Medicine
    • Pediatrics

    Background:

    • Ring chromosome 13 is a rare chromosomal abnormality.
    • 13q deletion syndrome presents with a spectrum of clinical features.
    • Genetic banding techniques are crucial for identifying chromosomal abnormalities.

    Observation:

    • A male infant presented with a karyotype of 46, XY,r(13)(p12q22), identified via R, D, and G banding.
    • Clinical manifestations included severe mental retardation, microcephaly, frontal bossing, a Greek facial profile, micropthalmia, coloboma, high-arched palate, low-set ears, and genital anomalies.

    Findings:

    • The patient's phenotype closely resembles the first group of 13q deletion syndrome as classified by Niebuhr and Ottosen.
    • The identified ring chromosome 13 (r(13)) encompasses segments from both the short (p12) and long (q22) arms.

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    Implications:

    • This case contributes to the understanding of genotype-phenotype correlations in ring chromosome 13.
    • Further research into the specific breakpoints and their impact on clinical presentation is warranted.
    • The findings highlight the importance of cytogenetic analysis in diagnosing complex genetic syndromes.