Waardenburg syndrome (MONDO_0018094, a Monarch Disease Ontology id) is a disorder characterized by varying degrees of deafness and minor defects in structures arising from neural crest, including pigmentation anomalies of eyes, hair, and skin. WS is classified into four clinical and genetic phenotypes. Also known as: Waardenburg Shah syndrome, Waardenburg's syndrome, van der Hoeve Halbertsona Waardenburg syndrome.