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Published on: October 13, 2018
Management of boys with short stature and delayed puberty
A C Couto-Silva1, C Trivin, L Adan
1Université René Descartes Paris V and Unité d'Endocrinologie Pédiatrique, Hôpital Bicêtre, Assistance Publique-Hopitaux de Paris, France.
Insights
Testosterone priming improves growth hormone (GH) secretion in boys with short stature and delayed puberty. The number of testosterone doses impacts priming quality, and careful assessment is crucial for treatment decisions.
Area of Science:
- Pediatric Endocrinology
- Growth Hormone Therapy
- Pubertal Development
Background:
- Short stature and delayed puberty are common concerns in pediatric endocrinology.
- Accurate assessment of growth hormone (GH) secretion is vital for guiding treatment decisions.
- Testosterone priming is a potential strategy to enhance GH assessment and stimulate growth.
Purpose of the Study:
- To review the management of boys with short stature and delayed puberty.
- To evaluate the efficacy of testosterone priming protocols for growth hormone (GH) testing.
- To analyze factors influencing final height in this cohort.
Main Methods:
- Studied 148 boys over 14 years old with height < -2 SDS and constitutional delayed puberty.
- Assessed growth hormone (GH) secretion via arginine-insulin tolerance tests with and without testosterone priming.
- Evaluated final height in 80 boys and correlated with GH secretion and IGF-I levels.
Main Results:
- Testosterone priming improved GH peak response in stimulated tests compared to no priming (25% vs. 41% low GH peak).
- Higher testosterone doses (4x100mg) showed a trend towards better GH response than lower doses (2x100mg).
- Final height was similar regardless of GH peak or testosterone treatment, with a significant proportion falling short of target height.
Conclusions:
- Nocturnal GH secretion is a more reliable indicator than stimulated GH peaks.
- The quality of testosterone priming is dose-dependent.
- Key management aspects include excluding underlying diseases and judiciously initiating testosterone therapy.
Objective:
To review the management of boys with short stature and delayed puberty and the testosterone priming protocol.
Methods:
In 148 boys aged > 14 years seen for height < -2 SDS and constitutional delayed puberty we evaluated growth hormone (GH) secretion and final height (80 boys).
Results:
The GH peak was < 10 microg/l after arginine-insulin tests performed with testosterone heptylate priming in 8/32 (25%) and without in 62/153 (41%), including first and second evaluations. It was low in 7/11 boys given 2 x 100 mg testosterone (14.7 +/- 1.7 microg/l) and in 1/21 given 4 x 100 mg (21.3 +/- 2.0 microg/l, p = 0.04). It was low during sleep in 4/29 (14%) boys, all having basal plasma testosterone below 3.5 nmol/l. The basal insulin-like growth factor (IGF)-I concentration was below -2 SDS in 22% of the boys evaluated. Final height was -0.8 +/- 0.1 SDS. It was similar in those with low (n = 9) and normal (n = 71) GH peak, and in those treated (n = 22) or untreated (n = 58) with testosterone. It was over 1 SDS lower than the target height in 20% and than the predicted height at the initial evaluation in 14% of the boys. Pubertal growth was not correlated with the GH peak or plasma IGF-I.
Conclusions:
The GH peak during the sleep is more frequently normal than the peak after stimulation. The number of testosterone doses influences the quality of priming. The medical problems involved in treating boys with delayed puberty are excluding disease and deciding on testosterone treatment.
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