In spite of the scarcity of reports on the association between PCDH19 and autism, the link between these two comes as no surprise as prior genetic analyses of patients with neurodevelopmental disorders such as ASD or schizophrenia have revealed mutations in other members of the protocadherin family, such as PCDH15 [42,43,44,45,46]. This evidence concerns the gene PCDH11X and neurodevelopmental disorder.