A type of reduced stature with normal proportions related to dysfunction of the pituitary gland related to either an isolated defect in the secretion of growth hormone or to panhypopituitarism, i.e., a deficit of all the anterior pituitary hormones.

A deficiency or slowing down of growth pre- and postnatally.

An abnormal enlargement of the sella turcica.

Deficiency of thyroid hormone.

Insufficient responses to growth hormone (GH) provocation tests. GH deficiency is defined as a serum peak GH concentration less than 10 ng/mL on provocation with a combination of at least two separate stimulation tests.