Isolated Growth Hormone Deficiency, Type Iii, with Agammaglobulinemia, also known as fleisher syndrome, is related to panhypopituitarism, x-linked and isolated growth hormone deficiency type iii. An important gene associated with Isolated Growth Hormone Deficiency, Type Iii, with Agammaglobulinemia is BTK (Bruton Tyrosine Kinase). Affiliated tissues include b cells and bone, and related phenotypes are delayed skeletal maturation and short stature