Phenotype details |
typical facial dysmorphisms (microbrachycephaly, arched eye brows, synophrys, ptosis, long philtrum, low posterior hairline, short neck), single palmar creases, hirsutism, mental retardation, seizures, growth retardation (height and weight below 3rd centiles); small hands, no structural limb abnormalities, severe form megacolon |