ESPE Abstracts

Background: NR5A1 mutations in 46,XY patients lead to various degrees of disorders of sex development (DSD). Familial cases have been described where the mother (heterozygous for the mutation) presented primary ovarian failure. Little is known about testicular function at puberty but most patients have biological markers of gonadal dysgenesis, raising fears of infertility.Objective and hypotheses: To describe a familial form of DSD due to NR5A1 mutation ...

Background: Chromosome analysis is always indicated in disorders of sex development (DSD), but the need for karyotyping in gender dysphoria (GD) is less clear.Aims and objectives: We therefore aimed to review the place of routine chromosome analysis in the management of GD in children and adolescents.Patients and methods: 490 children and adolescents with GD have been referred to the two endocrine clinics forming part of the joint ...

Background: Leydig-cell tumours in children are rare, comprising only 4 to 9% of all primary testis tumours in prepubertal males. These boys present with isosexual precocious pseudopuberty characterized by increased testosterone and low gonadotropin levels. We describe two cases and will discuss differential diagnosis and pathogenesis.Case 1: C. was first referred at 8 years old for pubertal development with accelerated growth since 4 years of age. His v...

The aim of this study was to assess the impact of meal size on glycemic control for T1D adolescent patients equipped with Diabeloop’s Closed Loop, DBLG1 System[1], based on data from the clinical trial NCT04190277. Among this dataset we isolated 37 adolescents. Only days with ≥70% available CGM data and >50% of time in closed-loop were included in the analysis, resulting in an average duration of 18 days per patient for a total of 668 days of treatment. To asses...

Recently, pathogenic biallelic variants in the gene encoding DNA polymerase epsilon catalytic subunit 1 (POLE1), have been described in 15 individuals from 12 families, including members of 3 Irish families. These loss-of-function mutations cause POLε deficiency, thus impairing DNA replication. All reported cases share the same heterozygous intronic variant (c.1686þ32C>G) as part of a common haplotype, in addition to a different loss-of-function variant in the ot...

Background: Many children with short stature (defined as height SDS <−2S.D.) have no identified cause for their growth impairment and are classified as either small for gestational age or idiopathic short stature depending on birth size. Whole exome sequencing (WES) is a useful tool to identify new genetic diagnoses in this group. Here we describe a recurrent NDUFB3 mutation in children with intra-uterine growth retardation, short stature and ...

Background: Endocrine disrupting chemicals (EDCs), such as phthalates and bisphenol A (BPA), have been associated with insulin resistance (IR) and type 2 diabetes (T2D) in non-pregnant adults. By contrast, recent pilot studies of pregnant women found negative associations between phthalates and blood glucose, and a lack of association with BPA. No studies have examined gestational IR or secretion in relation to EDC exposure.Objective: To confirm these re...

Introduction: About 15% of children born small for gestational age (SGA) do not reach final height within normal range. Recombinant human growth Hormone (rhGH) has shown to be effective in catching up growth velocity and height in children born SGA.The objective of our study is to identify the predictive factors of final height in children born SGA treated with rhGH.Materials and Methods: Monocentric, retrospective s...

Mineralization defects and paradoxical mineralizing enthesopathies are hallmarks of X-linked Hypophosphatemia (XLH), a rare skeletal disease caused by inactivating mutations in the PHEX gene (Phosphate-regulating endopeptidase homolog, X-linked). The current medical treatment, which consist in oral phosphorus supplementation and active vitamin D analogues, aimed at counteracting consequences of FGF23 excess and is commonly prescribed from early childhood to the end of...

Background: Prenatal androgen exposure can lead to variable virilization of external female genitalia. The lack of a consensus definition of clitoromegaly and the limited data available on normal steroid levels in female neonates makes its diagnosis difficult.Objective and hypotheses: The aims of this study were (i) to define reference sizes for external female genitalia in term and preterm neonates as a function of gestational age and birth weight; and ...