Cranial irradiation for cerebral and nasopharyngeal tumours in children: evidence for the production of a hypothalamic defect in growth hormone release.
A synthetic 29-amino acid analogue of human pancreatic GH-releasing hormone (GHRH(1-29)NH2) has recently been shown to stimulate the release of GH in normal subjects. We have studied the GH response to GHRH(1-29)NH2 in nine children irradiated for brain and nasopharyngeal tumours, who were not growing and were deficient in GH as assessed by insulin-induced hypoglycaemia. Serum GH rose in response to GHRH(1-29)NH2 in all the children, and in five the peak serum GH response was greater than 20 ...Expand abstract
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