<unk>  affects males and females in the same numbers. About 30 cases have been reported in medical literature. The disorder can be underdiagnosed causing no true frequency in the population.
Weissenbacher–Zweymüller syndrome
Smith–Magenis syndrome
Schinzel–Giedion syndrome
Marshall–Smith syndrome
Smith–Lemli–Opitz syndrome
Goldberg–Shprintzen syndrome
Bardet–Biedl syndrome
Kapur–Toriello syndrome