Caused by mutation in the TWIST transcription factor gene (TWIST, 601622.0001) [MOLECULAR BASIS] Phenotypic overlap with Muenke syndrome (602849) due to a mutation in the FGFR3 gene (P250R, 134934.0014) [MISCELLANEOUS] Few patients with mild to moderate mental retardation [MISCELLANEOUS] Incidence of 1 in 25,000 to 1 in 50,000 newborns [MISCELLANEOUS] Variable expressivity [MISCELLANEOUS]
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