Mowat-Wilson Syndrome, also known as microcephaly, mental retardation, and distinct facial features, with or without hirschsprung disease, is related to muckle-wells syndrome and marden-walker syndrome, and has symptoms including constipation, seizures and vomiting. An important gene associated with Mowat-Wilson Syndrome is ZEB2 (Zinc Finger E-Box Binding Homeobox 2). Affiliated tissues include heart and colon, and related phenotypes are intellectual disability and abnormal facial shape