Epidemiology
The overall incidence is ~1/42,000 to 1/50,000 people. Types I and II are the most common types of the syndrome, whereas types III and IV are rare. Type 4 is also known as WaardenburgâShah syndrome (association of Waardenburg syndrome with Hirschsprung disease).
Type 4 is rare with only 48 cases reported up to 2002.
About 1 in 30 students in schools for the deaf have Waardenburg syndrome. All races and both sexes are affected equally. The highly variable presentation of the syndrome makes it difficult to arrive at precise figures for its prevalence.
Read more about this topic: Waardenburg Syndrome