SHANK3 and autism spectrum disorder: Deletions and mutations in the SHANK3 gene have been repeatedly found when screening cohorts of patients assessed for autism spectrum disorder [1–3], for pervasive developmental disorder not otherwise specified (PDD-NOS) [4], for schizophrenia [5], for non-syndromic intellectual disability [6] and for symptomatic continuous spike and waves during slow-wave sleep syndrome [7].