X-linked lissencephaly with absent corpus callosum and ambiguous genitalia

William B. Dobyns, Elizabeth Berry-Kravis, Nancy J. Havernick, Kenton R. Holden, David Viskochil

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Lissencephaly has been described in over 10 distinct malformation syndromes. Recently, we have recognized 5 children from four unrelated families with an almost identical disorder comprising lissencephaly with a posterior-to-anterior gradient and only moderate increase in thickness of the cortex, absent corpus callosum, neonatal-onset epilepsy, hypothalamic dysfunction including deficient temperature regulation, and ambiguous genitalia in genotypic males. Our observation of 5 affected males in one of these families is consistent with an X-linked pattern of inheritance. However, it differs in many regards from the X-linked form of isolated lissencephaly sequence that is associated with mutations of the XLIS (DCX) gene. Therefore, we propose that this disorder comprises a new X-linked malformation syndrome, which we refer to as X-linked lissencephaly with ambiguous genitalia (XLA-G).

Original languageEnglish (US)
Pages (from-to)331-337
Number of pages7
JournalAmerican Journal of Medical Genetics
Issue number4
StatePublished - 1999
Externally publishedYes


  • Agenesis of the corpus callosum
  • Ambiguous genitalia
  • Lissencephaly
  • Malformation
  • Neuronal migration
  • X chromosome
  • X-linked


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