According to the DDD study the most commonly mutated genes in their cohort are ARID1B (Coffin-Siris syndrome), SCN2A, ANKRD11 (KBG syndrome), SATB2 (Glass syndrome), SYNGAP1, DYRK1A, MED13L, STXBP1, CTNNB1, KCNQ2, KMT2A (Wiedemann-Steiner syndrome), FOXP1, PACS1 (Schuurs-Hoeijmakers syndrome), SMARCA2 (Nicolaides-Baraitser syndrome) and WDR45 [11], all autosomal dominant genes besides WDR45. Here, WDR45 is linked to chromosome 2q32-q33 deletion syndrome.