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Related Experiment Videos

A second family with Micro syndrome.

G Rodríguez Criado1, M Rufo, I Gómez de Terreros

  • 1Unidad de Dismorfología, Infantil Universitario Virgen del Rocio, Sevilla, Spain. german@cica.es

Clinical Dysmorphology
|October 26, 1999
PubMed
Summary

This study details a rare genetic syndrome in two sisters, featuring severe developmental delays, brain abnormalities like microcephaly and cortical dysplasia, and distinct eye defects. Further research is needed to understand this condition and differentiate it from similar syndromes.

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Area of Science:

  • Genetics
  • Neurology
  • Ophthalmology

Background:

  • Two sisters presented with a complex clinical syndrome.
  • Parents were healthy and non-consanguineous, ruling out simple Mendelian inheritance.
  • The syndrome shares features with previously described conditions but has unique characteristics.

Purpose of the Study:

  • To describe a novel or variant clinical syndrome in two affected siblings.
  • To highlight the key clinical features and neurological, ophthalmological, and developmental aspects.
  • To differentiate the syndrome from Micro syndrome and other related disorders.

Main Methods:

  • Clinical case description and detailed phenotyping.
  • Exclusion of metabolic and chromosomal abnormalities through standard testing.

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  • Comparison with existing literature, particularly Warburg et al.'s description of Micro syndrome.

    • Main Results:

    • The sisters exhibited microcephaly, cortical dysplasia, ventriculomegaly, corpus callosum hypoplasia, cerebellar vermis hypogenesis, cataracts, microphthalmia, optic nerve atrophy, and retinal coloboma.
    • Severe global developmental delay was evident, including profound intellectual disability, inability to sit, lack of speech, and spastic tetraparesis.
    • Growth parameters (weight and height) were below the 3rd percentile, and no metabolic or chromosomal anomalies were detected.

    Conclusions:

    • The described clinical presentation represents a severe neurodevelopmental disorder with significant syndromic features.
    • While similar to Micro syndrome, distinct features warrant further investigation for precise classification.
    • The findings underscore the genetic heterogeneity of severe developmental brain malformations and associated ocular anomalies.