Coffin-Siris Syndrome 4, also known as mrd16, is related to coffin-siris syndrome 1 and contractures, pterygia, and spondylocarpotarsal fusion syndrome 1a. An important gene associated with Coffin-Siris Syndrome 4 is SMARCA4 (SWI/SNF Related, Matrix Associated, Actin Dependent Regulator Of Chromatin, Subfamily A, Member 4), and among its related pathways/superpathways is RUNX1 interacts with co-factors whose precise effect on RUNX1 targets is not known. Affiliated tissues include heart and bone, and related phenotypes are intellectual disability and global developmental delay