Growth Hormone Insensitivity Associated with a<i>STAT5b</i>Mutation

Abstract

This report documents that the syndrome of growth hormone insensitivity (severe short stature, increased secretion of growth hormone, but low serum concentrations of insulin-like growth factor I [IGF-I] and IGF–binding protein 3) in a teenage girl was due to a homozygous missense mutation in the gene for STAT5b, an essential component of the actions of growth hormone, as well as many other cytokine-induced functions.