ESPE Abstracts

Background: Beckwith–Wiedemann syndrome (BWS) is an overgrowth syndrome with an increased risk of embryonic tumors during early childhood. About 80% of patients with BWS show a molecular defect in the 11p15 imprinted region. Loss of methylation at the imprinting control region 2 (ICR2) is the most frequent defect which leads to a loss of expression of the CDKN1C gene, increasing cell proliferation. These epigenetic defects occur mostly as a mosaic event.<p cl...

Background: Severe diazoxide unresponsive hyperinsulinism (DUHI) is most often caused by autosomal recessive variants in the KATP channel genes. Because of the limited medical treatments available, many patients are treated with 98% pancreatectomy. This results in a high rate of diabetes by the age of 15 years. Many centers now try to avoid surgery to prevent the inevitable transition to post-surgical diabetes.Objectives:</strong...

Hypomethylation of the ICR1 in 11p15 is the epigenetic alteration causing Silver Russel Syndrome (SRS) in over 50% of the patients. It is reported that 7-38% of SRS patients have multi-locus imprinting disturbance (MLID). MLID has been suggested to result from maternal mutations affecting the acquisition or maintenance of imprints. We report on a patient with MLID who presented with features of SRS and Temple syndrome in addition to severe 46 XY hypovirilisation, pseudohypopar...

The SRD5A2 gene (MIM607306) codes for the type 2 5α-reductase enzyme that catalyzes the conversion of testosterone to its active metabolite, dihydrotestosterone (DHT), essential for the development of the male external genitalia. Pathogenic variants in homozygosis or compound heterozygosis may be responsible for a 46XY Disorder of Sex Development.Case: A 5-year-old girl who was referred to us after the mother noticed lumps on both ...

Introduction: Type 1 diabetes (T1D) is a chronic autoimmune disease characterized by the presence of pancreatic-autoantibodies, which are diagnostic biomarkers. The detection of autoantibodies in first-degree relatives of patients with T1D is considered a risk factor for developing the disease; however, there is little information on how long it takes from the detection of autoimmunity to the clinical onset of T1D.Objectives:</st...

Introduction: CPHD is characterized by GH and at least one other pituitary hormone deficiency. Mutations in genes expressed in the developing head, hypothalamus, and/or pituitary cause CPHD. To date around 30 genes have been identified to be related to CPHD, however the 85% of the cases remain with unknown aetiology. Whole Exome Sequencing (WES) enables parallel searching for pathogenic variants of CPHD in targeted known gene panels as well as the identifi...

Background: Silver-Russell syndrome (SRS) (mainly secondary to 11p15 molecular disruption) and Temple syndrome (TS) (secondary to 14q32.2 molecular disruption) are imprinting disorders with very close phenotypic (prenatal and postnatal growth retardation, early feeding difficulties, early puberty) and molecular anomalies. Our objective was to describe the clinical overlap between SRS and TS and to extensively study the molecular aspects of patients with 14q32.2 molecular disru...

Type 1 diabetes (T1DM) in childhood is a highly prevalent disease, with incidence oscillating around 17.6/100000. However, incidence is higher in some communities (25.5/100,000), as it is in the case that concerns us. Diabetic ketoacidosis (DKA) is a complication usually recorded in 25–40% of cases but has been as high as 55% in studies of children under 5 years old. (T1DM) is an associated autoimmune disease to other precursor autoimmune pathologies.<p class="abstext...

Background: We present a patient with co-existence of two rare conditions 3β-Hydroxysteroid dehydrogenase type 2 deficiency (HSD3B2) the rarest form of Congenital Adrenal Hyperplasia (CAH) and Bartter’s Syndrome (hypokalaemic alkalosis secondary to hyperaldosteronism).Case Report: A female infant (46XX) born at 34/40 weeks weighing 2.67 kg to non-consanguineous parents presented on day four of life with significant weight loss. Subsequent inves...

Background: The usefulness of corticotrophin (ACTH) test in diagnosis of 21-hydroxylase deficiency and/or other enzymic defects in children and adolescents with serum levels of 17-OHP (before 2000 h) >2 ng/ml is known.Objective and hypotheses: To evaluate the usefulness of ACTH test in diagnosis of non-classical congenital adrenal hyperplasia (NCCAH) and heterozygosity of CYP21 gene molecular defects in children and adolescents with clinical hyperand...