ESPE Abstracts

Background: We have previously shown that estradiol (E2) matrix patches for adults could be cut in smaller pieces to administer low doses for pubertal induction in girls with hypogonadism. With a slow increase of the patch size during a few years, serum E2 levels in normal girls undergoing puberty can be closely mimicked.Objective and hypotheses: To evaluate storage conditions once the patch has been cut.Metho...

Background: The Turner syndrome (TS) Working Group of the ESPE intends to start an international study comparing transdermal estradiol (E2) vs oral E2 in Europe in girls with TS. For this, stable and reliable products for children are needed, for use in different countries with different climates. It has previously been shown that E2 matrix patches for adults can be cut in smaller pieces to administer low doses for pubertal induction in girls. The Turner Working Group plan to ...

Background: In a previous study, we reported that adult height (AH) outcomes in growth hormone treated males with Silver-Russell syndrome (SRS) were negatively correlated with estradiol concentrations before start of puberty and in early puberty. Whether elevated estradiol concentrations originated from adrenal or testicular androgens is unclear. We aimed to describe androgen secretion patterns and investigate correlations between androgen concentrations and A...

Background: We have previously shown radioimmunoassay (RIA) and gas chromatography-tandem mass spectrometry (GC-MS/MS) to be comparable when analyzing estradiol and testosterone concentrations in prepubertal and pubertal children. However, the reliability for steroid hormone determination with RIA in umbilical cord blood is not known. In general, older studies using RIA show higher values of testosterone, than more recent ones using MS/MS.Patients and me...

Background: Children with Silver Russell syndrome (SRS) suffer from severe intrauterine growth retardation. During infancy, short stature and delayed bone maturation are common features. A majority of these children initially have a good growth response to GH treatment. A catch-up period of skeletal maturation is often seen in early puberty. Later in puberty poor height acceleration may be seen.Objective and hypothesis: The objective of this study was to...

Background: Gender differences in sex steroids and IGF1 are well known from pubertal years into adulthood. Few studies report data from pre-school years.Objective and hypotheses: To study gender specific changes in sex steroids and IGF1 at birth and at 5 years of age and correlate these with auxological measurements. There are gender differences in IGF1 levels due to differences in sex steroids already at birth and during pre-school years.<p class="a...

Objectives: In laboratory medicine, external quality assessment (EQA) schemes have become versatile tools for the detection of analytical flaws. However, for pediatric sex steroid levels EQA schemes are lacking. We aimed to investigate the suitability of different estradiol and testosterone immunoassays in a pediatric setting, in comparison with clinical liquid chromatography-tandem mass spectrometry (LC-MS/MS) assays.Methods:</s...

Background: The estimated estradiol (E2) dose required for pubertal induction in hypogonadal girls is about 1/10 of the adult dose. Previous studies have shown that it is possible to provide an individualized and physiological dose for pubertal induction by cutting the patch into smaller pieces. However, the manufacturers do not guarantee stability or utility of cut E2 patches, primarily designed for postmenopausal women, and have no interest in that eval...

Background: Early TS diagnosis permits early GH start and estradiol (E2) supplementation approaching adult height (AH) at normal age and within a normal range. However, higher age at diagnosis is still a challenge.Objective and hypotheses: The hypothesis from our long-term trials will result in knowledge for personalized treatment in order to obtain a psychological acceptable age at onset of puberty and still an attained AH within normal range...

Background: Small for gestational age (SGA) children have reportedly increased DHEAS levels during prepubertal years. However, steroid hormones have not been followed longitudinally in a healthy population compared to body composition.Aims and objectives: To evaluate steroid hormone patterns in prepubertal children correlated to visceral fat measures.Methods: Body composition was investigated with magnetic resonance (MR) of truncal...