<unk>  is a rare genetic disorder characterized by a range of manifestations including mental retardation and skull and facial anomalies.
Chromosome 2p16.1-p15 deletion syndrome
13q deletion syndrome
22q11.2 deletion syndrome
9q34 deletion syndrome
Lenz-Majewski hyperostotic dwarfism syndrome
Smith-Magenis syndrome
Bardet-Biedl syndrome
Goldberg–Shprintzen syndrome