| Variable intrauterine and postnatal growth retardation and elevated serum IGF-I levels. Additional features include variable degrees of intellectual deficit, microcephaly and dysmorphism (broad nasal bridge and tip, smooth philtrum, thin upper and everted lower lips, short fingers, clinodactyly, wide-set nipples and pectus excavatum). Prevalence is unknown, may be caused by a variety of genetic defects. |
