Incidence of<unk>  varies geographically, with approximately 1 case per 280,000 live births in Northern Ireland, 1 per 66,000 in Australia, and 1 per 50,000 in the Netherlands. The Australian study estimated the following incidences for each subtype of<unk> :<unk>  type Approximate incidence Percentage of cases Age of onset A 1 in 100,000 60% 1.5-4 B 1 in 200,000 30% 1-4 C 1 in 1,500,000 4% 3-7 D 1 in 1,000,000 6% 2-6
Sanfilippo syndrome
Autism spectrum
DeSanto-Shinawi syndrome
Filippi Syndrome
Treacher Collins syndrome
Pelger–Huët anomaly
Van der Woude syndrome
Van Gogh syndrome