Abstract
AbstractWe describe a clinicoautopsy phenotype of an occipital skull defect, ventriculomegaly, agenesis of corpus callosum and Dandy Walker Malformation (DWM) with a novel single base insertion in the TMEM5 gene, known to cause Walker Warburg syndrome. The clinical features of DWM extends the phenotype, while the pathogenic variant observed expands the mutational spectrum of the syndrome. This case highlights the importance of detailed postnatal phenotyping after a pregnancy is discontinued for an antenatallly detected malformation. Fetal samples must also be preserved for genetic tests to allow an etiological diagnosis in these situations. It is important for the fetal medicine specialists to remember to test for single gene disorders, after a normal chromosomal microarray especially in case of recurrence of a disease in a family.
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