ESPE Abstracts

Magnetic resonance imaging (MRI) of the brain in disorders of sexual development (DSD) is still relatively scarce despite the opportunities it offers for understanding the influence of sex hormones on emotion and cognition. In this talk I will give an update on current structural and functional MRI research in different DSDs such as Klinefelter syndrome, Turner syndrome, Congenital Adrenal Hyperplasia, or Familial Male Precocious Puberty. Finally, parallels will be drawn to cu...

Background: Silver Russell syndrome (SRS) is characterized by low birth weight, severe postnatal short stature and distinctive facies. In ~50% of patients, (epi)genetic alterations can be detected (~40% hypomethylation of H19 on chromosome 11, ~10% maternal uniparental disomy (UPD) 7). As SRS patients are usually born small for gestational age (SGA), they are treated with GH to improve height. However, data on long-term effects of GH treatment in SRS patients are very limited....

Background: Congenital adrenal hyperplasia (CAH) due to 21-hydroxylase deficiency (21-OHD) is worldwide the most common autosomal recessive disorder caused by defects in the CYP21A2 gene.Objective: The main objective of the study was to evaluate CAH in Cyprus over a 10 year period.Methods: All known patients were included in a population retrospective subset analysis of Cypriot patients with confirmed CAH and their clinica...

Introduction: Prohormone convertases are a family of proteins that mediate the processing and activation of peptide hormones and neuropeptide precursors. Homozygous mutations of the PCSK1 gene result in prohormone convertase 1 deficiency that is characterized by diarrhea, hypoglycemia, multiple pituitary hormone deficiency beginning from neonatal period and obesity beginning after infancy.Case: A 35-day-old boy was referred to our hospit...

Background: The SNAP study is a prospective fracture study of children with chronic inflammatory and/or disabling conditions.Objective and Hypotheses: The overall aim of the study is to establish if there is a causal link between measured body-size related bone density and low trauma fracture.Method: 280 children, aged 5–18 years, from seven disease groups namely; acute lymphoblastic leukaemia (ALL), rheumatological disease, i...

Background: Congenital hypothyroidism is primarily due to thyroid dysgenesis (TD). The genes implicated in TD, account for a small number of patients with monogenic forms, less than 5%. Borealin is a major component of the Chromosomal Passenger Complex, an essential regulator of mitosis.Objective and hypotheses: To understand the role of Borealin mutations found in patients with TD.Method: We performed whole exome sequencing (WES) ...

Background: Recently, mutations in the maternally imprinted MKRN3 gene have been associated to familial idiopathic central precocious puberty (iPPC). The clinical phenotype and the frequency of these mutations are poorly described.Objective and hypotheses: Delineate the frequency of MKRN3 mutations in iPPC and perform a genotype–phenotype correlation in MKRN3 mutated patients.Method: 59 index cases with iPPC have been included...

Background: SHOX and enhancer regions on PAR1 disorders have variable phenotypic consequences such as idiopathic short stature (ISS) and Leri-Weill Dyschondrosteosis (LWD).Objective and hypotheses: The aim of this observational multicentric study was to describe phenotypes and genotypes of a large population with mutation on SHOX and adjacent regions and to identify a possible phenotype–genotype correlation.M...

Background: The surgical reconstruction of hypospadias is usually performed during the first 2 years of life but little objective data is available to determine its optimal timing. Whereas the no-early surgery option in DSD management is rising, the results of late genital surgery should be evaluated before advocating this attitude.Objective and hypotheses: To evaluate the outcome of hypospadias surgery according to age and to determine if some complicat...

Background: Vitamin D deficiency can cause rickets and impaired bone growth in infants. In India, randomization to higher vitamin D supplementation doses in pregnancy led to decreased anterior fontanelle and increased head circumference at 0 and 9 months.Objective and hypotheses: To investigate the impact of cord 25-hydroxyvitamin D (25(OH)D) concentrations on cranial measures.Method: In a Danish prospective birth cohort of 2549 mo...