KAT6A and autosomal dominant intellectual disability-craniofacial anomalies-cardiac defects syndrome: Arboleda-Tham syndrome (ARTHS; OMIM: 616268), alternatively termed KAT6A syndrome, is recognized as a rare autosomal dominant neurodevelopmental disorder caused by variants in the KAT6A gene (OMIM: 601408) located on chromosome 8p11.21 (Arboleda et al., 2015).