Description : Although the phenotypic spectrum and severity of FG syndrome is wide, the cardinal
features include congenital hypotonia, delayed speech development, relative macrocephaly,
dysmorphic facies, and anal anomalies or severe constipation (Unger et al., 2007).;
Inheritance : X-linked;
Molecular basis : Caused by mutation in the filamin A gene (FLNA, 300017.0028);