A novel heterozygous missense mutation G316D of SIX3 gene in a Brazilian patient with holoprosencephaly-like phenotype and Langerhans cell histiocytosis

Abstract

Here we report on a Brazilian female patient with the clinical manifestations of the holoprosencephaly-like phenotype who also presented with a retroocular granuloma diagnosed as Langerhans cell histiocytosis in early infancy. Mutation analysis showed a missense mutation (G316D) in the exon 2 of SIX3 gene, which was predicted as damaged by the PolyPhen program. We discuss the clinical and genetic aspects of this unusual case.