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Related Experiment Videos

Hemifacial microsomia and variants: pedigree data.

B R Rollnick, C I Kaye

    American Journal of Medical Genetics
    |June 1, 1983
    PubMed
    Summary

    This study on hemifacial microsomia (HFM) and Goldenhar syndrome (GS) found that mild ear malformations are common and often run in families, suggesting a shared genetic basis for these related conditions.

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    Area of Science:

    • Genetics
    • Developmental Biology
    • Medical Genetics

    Background:

    • Ear malformations can occur independently or as part of broader congenital anomaly syndromes.
    • Hemifacial microsomia (HFM) and Goldenhar syndrome (GS), also known as oculoauriculovertebral dysplasia (OAV), encompass a spectrum of craniofacial and vertebral anomalies.
    • The etiology of HFM/GS/OAV remains largely unknown, with potential genetic and environmental factors.

    Purpose of the Study:

    • To investigate the inheritance patterns and familial occurrence of ear malformations in individuals with HFM or GS/OAV.
    • To explore the phenotypic spectrum and potential shared etiology of HFM and GS/OAV.
    • To provide data for genetic counseling regarding these conditions.

    Main Methods:

    • Pedigree analysis of 97 propositi with HFM or GS/OAV.
    • Family history data collection, including affected relatives and specific anomalies.
    • Calculation of recurrence risks and assessment of inheritance patterns.

    Main Results:

    • A significant proportion of propositi (44/97) had a family history of similar anomalies.
    • First-degree relatives showed an 8% affection rate (35/433), and 6% of siblings (11/176) were affected.
    • Mild ear malformations, such as preauricular tags or nodes, were the most frequent anomaly observed.

    Conclusions:

    • The familial occurrence and varied presentation suggest a multifactorial or complex genetic basis for HFM/GS/OAV.
    • The wide range of anomalies within families supports the hypothesis that these disorders represent a single, albeit broad, clinical entity.
    • Findings are crucial for accurate genetic counseling and understanding the genetic counseling implications of these craniofacial anomalies.

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