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Autosomal recessive nonsyndromal microcephaly with normal intelligence.

A S Teebi, S A Al-Awadi, A G White

    American Journal of Medical Genetics
    |February 1, 1987
    PubMed
    Summary

    Autosomal recessive microcephaly typically causes intellectual disability. This study identifies a variant presenting with microcephaly and normal intelligence in an Arab kindred, suggesting a distinct genetic condition.

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    Area of Science:

    • Genetics
    • Pediatrics
    • Neurology

    Background:

    • Autosomal recessive microcephaly is commonly linked to moderate to severe intellectual disability.
    • A recently described disorder includes microcephaly, distinct facial features, normal intelligence, immunodeficiency, and malignancy risk.

    Purpose of the Study:

    • To describe a large Arab kindred with microcephaly, peculiar facies, and normal intelligence.
    • To investigate the characteristics and potential genetic basis of this variant.

    Main Methods:

    • Clinical observation and documentation of eight affected individuals across five sibships.
    • Review of medical history, including cause of death for two individuals.
    • Immunological and chromosomal studies on three affected living individuals.

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    Main Results:

    • Eight cases presented with microcephaly, peculiar facies, and normal intelligence.
    • Two cases died from lymphoreticular malignancy or bronchopneumonia.
    • Immunological and chromosomal analyses in affected individuals were normal.

    Conclusions:

    • The findings support the existence of an autosomal recessive nonsyndromal microcephaly variant with normal intelligence.
    • This variant is distinct from previously described microcephaly syndromes.
    • Further research is needed to elucidate the genetic underpinnings of this condition.