Cases of SBBYS are not caused by the parents affected genes (unless you choose to marry a cousin) however, they are affected by their own mutation on the KAT6B gene. If a doctor does suspect that a child or patient will suffer from SBBYS they are able to diagnose the individual through genetic testing. Unfortunately, SBBYS has no cure and is hard to treat because of how hard it is to diagnose. SBBYS occurs in les than 1 in a million kids.
Young–Simpson syndrome
Antley–Bixler syndrome
Witteveen–Kolk syndrome
Grisel's syndrome
Havana syndrome
Michels Caskey syndrome
Bogart–Bacall syndrome
Fowler's syndrome