Waardenburg Syndrome, Type 4b, also known as waardenburg syndrome type 4b, is related to sensorineural hearing loss and waardenburg syndrome, type 4a. An important gene associated with Waardenburg Syndrome, Type 4b is EDN3 (Endothelin 3), and among its related pathways/superpathways is Ion channel transport. Affiliated tissues include skin and eye, and related phenotypes are sensorineural hearing impairment and premature graying of hair