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  • Title: Comparison of spontaneous growth hormone secretion during daytime and sleep in children with short stature.
    Author: Sanz MT, Rochiccioli P.
    Journal: Horm Res; 1985; 22(1-2):17-23. PubMed ID: 4040883.
    Abstract:
    The authors compared diurnal growth hormone (GH) secretion with GH secretion during sleep in 24 children with delayed growth. In group I (children with normal response to provocative tests), the level of daytime secretion was lower than that of nocturnal secretion. In 3 of 9 cases, daytime secretion was abnormal, whereas nocturnal secretion was normal. In 2 cases, both diurnal and nocturnal secretion were abnormal, but response to provocative stimuli was normal. In group II (children with a false partial GH deficiency, i.e. with inadequate response to provocative tests, GH peak less than 11 ng/ml and normal nocturnal secretion), the results were comparable with those of group I, with extremely low diurnal secretion in 6 of 9 cases. In group III (children presenting true partial GH deficiency, i.e. GH less than 11 ng/ml in response to provocative tests together with abnormal nocturnal secretion), both diurnal and nocturnal GH secretion were insufficient, with nonexistent diurnal secretion in 5 of 6 cases. Diurnal secretion does not seem to be a reliable indicator of 24-hour spontaneous secretion.
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