Children with<unk>  types 2 and 3 "have a higher risk for neurodevelopmental disorders and a reduced life expectancy" than children with<unk>  type 1, but if treated, favorable outcomes are possible. In severe cases, respiratory and neurological complications often lead to early death.
Pfeiffer syndrome
Zechi-Ceide syndrome
Johanson–Blizzard syndrome
Gómez–López-Hernández syndrome
Sanjad-Sakati syndrome
Adams–Nance syndrome
Lucey–Driscoll syndrome
Twiddler's syndrome