Intellectual Disability-Hypoplastic Corpus Callosum-Preauricular Tag Syndrome, also known as da silva syndrome, is related to microcephaly and corpus callosum, agenesis of. An important gene associated with Intellectual Disability-Hypoplastic Corpus Callosum-Preauricular Tag Syndrome is ARID1B (AT-Rich Interaction Domain 1B), and among its related pathways/superpathways are Chromatin Regulation / Acetylation and RUNX1 interacts with co-factors whose precise effect on RUNX1 targets is not known. Affiliated tissues include skin, and related phenotypes are delayed skeletal maturation and microcephaly