ESPE Abstracts

Background: Hypospadias is a common characteristic of Disorders of Sex Development (DSD). At the present time a molecular diagnosis is not reached in over 50% of cases. The DDD Study represents a useful resource of large molecular and phenotypic datasets obtained from individuals with an undiagnosed developmental abnormality including DSD.Objective: To review associated features and identify likely pathogenic variants in previously undiagnosed DDD partic...

Background: Collaborative project to review the phenotypic and genotypic data from children recruited to the UK wide deciphering developmental disorders (DDD) study.Objective and hypotheses: To report the frequency and range of disorders of sex development (DSD) phenotypes observed in DDD participants who have one or more associated ‘neurodevelopmental delay’ diagnostic human phenotype ontology (HPO) term.Method: Retrospe...

Background: Silver-Russell syndrome (SRS) is a clinically and genetically heterogeneous syndrome, characterized by pre- and postnatal growth restriction among other features. Pathogenic variants in genes involved in the HMGA2-PLAG1-IGF2 pathway have been found to cause an SRS phenotype. Here we present four individuals with variants in the PLAG1 gene, exhibiting features of SRS. Two siblings of the same family inherited the PLAG1 variant from...

Introduction: Complications are frequently reported post hypospadias repair and there is a need to understand the factors that influence their occurrence.Aim: The aim of this study was to identify the occurrence of complications in boys with hypospadias that are in the I-DSD Registry.Methods: Data from boys born with hypospadias between 2010-2020 were obtained from the I-DSD regist...

Background: Testicular and ovo-testicular 46,XX-DSD are very rare conditions that have a variable presentation and often pose challenging questions regarding long-term outcome of gonadal function.Methods: Eligible cases were identified in the I-DSD Registry and centres were asked to update the clinical dataset to their last available assessment. The cases were categorised by assigned sex and age categories. Elevated and ...

Background/Aims: 46,XY gonadal dysgenesis (GD) is classified as complete (CGD) or partial (PGD) depending on gonadal morphology and function. In contrast to the typical female external genitalia in CGD, the phenotype of PGD is variable depending on androgen production. A diagnosis of PGD is based on clinical/biochemical features, gonadal histology and genetic findings. The aim of this study is to characterise these features, particularly histological, in a lar...

Introduction: Data on BP in children with classic congenital adrenal hyperplasia (CAH) is inconsistent.Aim: To assess the trend in BP throughout childhood using data from the International CAH registry and compare this to normative data from the American Academy of Paediatrics (AAP).Method: This retrospective multi-centre study included 37 centres from 20 countries. BP data was ana...

Background: The International Congenital Adrenal Hyperplasia (CAH) Registry provides rich longitudinal data from CAH patients with 21 Hydroxylase deficiency. We estimated the average total causal effect of fludrocortisone on blood pressure in patients with CAH by modelling within a causal inference framework.Methods: We constructed a directed acyclic graph (DAG) with domain experts (using Dagitty.net) to establi...

Background: Alterations in blood pressure in treated CAH due to 21 hydroxylase deficiency is contentious, with studies reporting different effects. We used data from young adults entered into the I-CAH registry to assess the change in blood pressure readings recorded within patients over time.Methods: We used longitudinal mixed effects modelling (LMEM) in R to account for repeated measures in two levels within patients a...

Introduction and Objective: Previous evidence from the I-CAH registry showed wide variation of glucocorticoid (GC) replacement between different countries and centres. We wanted to explore the impact of different GC doses on height and weight in children and young people with CAH.Methods: We analysed data from patients under 18 years with 21-hydroxylase deficiency recorded in the I-CAH registry from assessments since 200...