Coffin-Siris Syndrome 2, also known as mrd14, is related to ovarian small cell carcinoma and spinal canal and spinal cord meningioma. An important gene associated with Coffin-Siris Syndrome 2 is ARID1A (AT-Rich Interaction Domain 1A), 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 heart and bone, and related phenotypes are intellectual disability and ptosis