open access

Vol 58, No 3 (2007)
Original papers
Published online: 2007-09-19
Submitted: 2013-02-15
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Partial growth hormone deficiency (GHD) in children has more similarities to idiopathic short stature than to severe GHD

Joanna Smyczyńska, Andrzej Lewiński, Maciej Hilczer, Renata Stawerska, Michał Karasek
Endokrynologia Polska 2007;58(3):182-187.

open access

Vol 58, No 3 (2007)
Original papers
Published online: 2007-09-19
Submitted: 2013-02-15

Abstract

Introduction: Assessment of growth hormone (GH) secretion is based on stimulation tests. Low GH peaks in stimulation tests, together with decreased insulin-like growth factor-I (IGF-I) secretion, confirm a diagnosis of GH deficiency (GHD). However, limitations in interpreting the test results and discrepancies between GH and IGF-I secretion in particular patients have both been reported. GH therapy should improve the prognosis of adult height (PAH). The aim of the study was to compare the deficit of height at diagnosis, IGF-I secretion and PAH in children with either decreased (in varying degrees of severity) or normal GH secretion in stimulation tests.
Material and methods: The analysis comprised 540 short children (373 boys, 167 girls), aged 11.7 &plusmn; 3.2 years. In all the patients two GH stimulation tests were performed, IGF-I serum concentration was measured, bone age was assessed and PAH was calculated. According to the GH peak in the two stimulation tests, the patients were classified into the following groups: severe GHD (sGHD) - GH peak < 5 ng/mL (n = 44), partial GHD (pGHD) - GH peak 5&#8211;10 ng/mL (n = 190), idiopathic short stature (ISS) - GH peak at least 10 ng/mL (n = 306).
Results: A significantly greater deficit of height, lower IGF-I secretion and worse PAH were observed in sGHD than in both remaining groups, while all the differences between pGHD and ISS in the parameters analysed were insignificant.
Conclusion: The results obtained indicate the necessity of applying another methods of qualifying short children for GH therapy other than GH stimulation tests with a cut-off value at a level of 10 ng/mL. (Pol J Endocrinol 2007; 58 (3): 182-187)

Abstract

Introduction: Assessment of growth hormone (GH) secretion is based on stimulation tests. Low GH peaks in stimulation tests, together with decreased insulin-like growth factor-I (IGF-I) secretion, confirm a diagnosis of GH deficiency (GHD). However, limitations in interpreting the test results and discrepancies between GH and IGF-I secretion in particular patients have both been reported. GH therapy should improve the prognosis of adult height (PAH). The aim of the study was to compare the deficit of height at diagnosis, IGF-I secretion and PAH in children with either decreased (in varying degrees of severity) or normal GH secretion in stimulation tests.
Material and methods: The analysis comprised 540 short children (373 boys, 167 girls), aged 11.7 &plusmn; 3.2 years. In all the patients two GH stimulation tests were performed, IGF-I serum concentration was measured, bone age was assessed and PAH was calculated. According to the GH peak in the two stimulation tests, the patients were classified into the following groups: severe GHD (sGHD) - GH peak < 5 ng/mL (n = 44), partial GHD (pGHD) - GH peak 5&#8211;10 ng/mL (n = 190), idiopathic short stature (ISS) - GH peak at least 10 ng/mL (n = 306).
Results: A significantly greater deficit of height, lower IGF-I secretion and worse PAH were observed in sGHD than in both remaining groups, while all the differences between pGHD and ISS in the parameters analysed were insignificant.
Conclusion: The results obtained indicate the necessity of applying another methods of qualifying short children for GH therapy other than GH stimulation tests with a cut-off value at a level of 10 ng/mL. (Pol J Endocrinol 2007; 58 (3): 182-187)
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Keywords

short stature; growth hormone deficiency; stimulation tests; insulin-like growth factor-I; predicted adult height

About this article
Title

Partial growth hormone deficiency (GHD) in children has more similarities to idiopathic short stature than to severe GHD

Journal

Endokrynologia Polska

Issue

Vol 58, No 3 (2007)

Pages

182-187

Published online

2007-09-19

Bibliographic record

Endokrynologia Polska 2007;58(3):182-187.

Keywords

short stature
growth hormone deficiency
stimulation tests
insulin-like growth factor-I
predicted adult height

Authors

Joanna Smyczyńska
Andrzej Lewiński
Maciej Hilczer
Renata Stawerska
Michał Karasek

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