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Loss‐of‐Function Mutations in KIF15 Underlying a Braddock–Carey Genocopy

Braddock–Carey Syndrome (BCS) is characterized by microcephaly, congenital thrombocytopenia, Pierre–Robin sequence (PRS), and agenesis of the corpus callosum. BCS has been shown to be caused by a 21q22.11 microdeletion that encompasses multiple genes. Here, we report a BCS genocopy characterized by congenital thrombocytopenia and PRS that is caused by a loss‐of‐function mutation in KIF15 in a consanguineous Saudi Arabian family. Mutations of mitotic kinesins are a well‐established cause of microcephaly. To our knowledge, KIF15 is the first kinesin to be associated with congenital thrombocytopenia.