Waardenburg Syndrome, Type 4a, also known as waardenburg syndrome type 4a, is related to peripheral demyelinating neuropathy, central dysmyelination, waardenburg syndrome, and hirschsprung disease and waardenburg syndrome, type 4c. An important gene associated with Waardenburg Syndrome, Type 4a is EDNRB (Endothelin Receptor Type B), and among its related pathways/superpathways are Tyrosine Kinases / Adaptors and Neural crest differentiation. Affiliated tissues include skin and eye, and related phenotypes are constipation and hearing impairment