ESPE Abstracts

Background: Isolated GH deficiency (IGHD) may be due to several different causes. Mutations in the GHRH receptor (GHRHR) gene are a relatively rare cause of IGHD.Objective and hypotheses: To understand the molecular cause of severe short stature in a large highly consanguineous family with IGHD.Method: Affected patients were evaluated for GH secretion and other anterior pituitary function. Anterior pituitary size was measu...

Background: Congenital hyperinsulinism (CHI) causes severe hypoglycaemia in children, due to dysregulated insulin secretion from pancreatic β-cells. Glucagon, secreted from the pancreatic α-cells, is critical for blood glucose homeostasis. Somatostatin is secreted by Δ-cells of the islets and by extraislet neuroendocrine cells. Exogenous somatostatin potently inhibits insulin and glucagon release from pancreatic islets. Under normal physiological conditions, low...

Background: 17β-Hydroxysteroid dehydrogenase type 3 (17β-HSD3) deficiency is a rare cause of 46,XY sex reversal due to a defect in conversion of androstenedione to testosterone. It is autosomal recessively inherited and caused by mutations in 17HSD3.Objective and hypotheses: To define clinical and laboratory characteristics of 17β-HSD3 deficiency during neonatal period.Method: An 8-day-old newborn with female externa...

Background: Type 1 diabetes mellitus (T1DM) is a common autoimmune condition in childhood and may be complicated by episodes of diabetic ketoacidosis (DKA). DKA is a state of severe insulin deficiency, resulting in hyperglycemia, ketonemia, acidemia, and systemic inflammation. This is predominantly attributable to intracerebral complications. We report a girl with a newly diagnosed T1DM who presented with DKA and cerebral infarction.Case: A 13-year-old p...

Aim: Osteopetrosis is caused by autosomal mutations occurring in nine genes (TNFRSF11A, TNFSF11, TCIRG1, CLCN7, OSTM1, SNX10, PLEKHM1, CA2, and LRP5). Detecting the aetiology and providing genetic counselling via individual mutation analysis of all these genes is expensive and time consuming. Whole exome sequencing is currently increasingly used given that the cost and the time needed are similar to that of single gene sequencing analysis. Here, two newborns,...

Background: Vitamin D dependent rickets type I (VDDR1) is an autosomal recessive disorder caused by mutations in the 25-Hydroxyvitamin-D3 1-α-hydroxylase gene(CYP27B1).Objective and hypotheses: To evaluate clinical characteristics and molecular genetic analysis of the pediatric patients with VDDR1 who were being followed at Diyarbakir Children’s State Hospital, Turkey.Method: VDDR1 diagnosis was consid...

Background: 46,XY DSD occurs as a result of testicular developmental disorders, defect in androgen synthesis or action. Nowadays, the diagnosis of DSD is quite costly and it takes a considerable amount of time due to lengthy hormonal and genetic analysis.Objective and hypotheses: The use of targeted next-generation sequencing of all known genes associated with 46 XY DSD for a fast molecular genetic diagnosis in patients in whom underlying defect of DSD w...

Background: There are limited data on differences in height, bone mineral density (BMD) and pubertal delay between homozygous and heterozygous carriers of IGFALS defects.Objective and hypotheses: To describe clinical and laboratory features and BMD of homozygous and heterozygous carriers of a novel IGFALS mutation in a large Kurdish family.Method: Index cases were two first degree cousins presenting with short stature, low IGF1, ve...

Introduction: Steroidogenic factor-1 (SF1/NR5A1) is a nuclear receptor, which regulates genes that have functions in the development of adrenal glands and gonads, reproduction, and other metabolic functions.Case presentation: A 20-day-old infant was admitted due to ambiguous genitalia. Physical examination revealed a 2×1 cm phallus, bifid scrotum, and hypospadias. Both gonads were palpable in the inguinal canal. Serum levels of adrenal androgens (17...

Background: Androgen insensitivity syndrome is the most common cause of 46,XY disorders of sex development. This condition is inherited in an x-linked recessive pattern and the most common causes are inactivating mutations in the androgen receptor (AR) gene.Objective and hypotheses: In this study, we report a novel AR gene mutation in an adolescent patient presenting with primary amenorrhea.Method: A 16-year-old p...