<unk>  is the leading inherited cause of intellectual disorder and autism spectrum disorder with severe behavioral abnormalities . It is an X linked disorder, affecting both males and females. It is a genetic disease caused by CGG trinucleotide expansion (>200 CGG repeats).
Fragile X syndrome
Rett syndrome
Axenfeld syndrome
Foster Kennedy syndrome
Krabbe disease
Joubert syndrome
Zellweger syndrome
Loken Senior syndrome