Mowat-Wilson syndrome (MONDO_0009341, a Monarch Disease Ontology identifier) (MWS) is a multiple congenital anomaly syndrome characterized by a distinct facial phenotype, intellectual disability, epilepsy, Hirschsprung disease (HSCR) and variable congenital malformations. Also known as: Hirschsprung disease intellectual disability syndrome, Hirschsprung disease mental retardation syndrome, Hirschsprung disease-intellectual disability syndrome, microcephaly, intellectual disability, and distinct facial featrues, with or without Hirschprung disease, microcephaly, mental retardation, and distinct facial featrues, with or without Hirschprung disease.