ESPE Abstracts

Background: Newborn (NB) screening programs show a wide variation in congenital hypothyroidism (CH) incidence along the years.Objective and hypotheses: To describe CH incidence, etiology, associated malformations and Down Syndrome (DS) in children detected by our NB Screening Program. To search differences between permanent CH (PCH) and transient forms (TCH).Method: We analyzed NB with positive screening results referred between A...

Background: Insulin/IGF1 signaling plays a critical role in central glucose bioavailability and lipid metabolism. An increase in glucose disposal can generate reducing agents through the pentose-phosphate pathway necessary for the synthesis of free fatty acids (FFA). Disturbances in lipid synthesis are related to the appearance of insulin resistance and diabetes. The insulin receptor substrate 2 (IRS2) deficient mice (IRS2−/−) is an excellent model to st...

Background: Androgen insensitivity syndrome in its complete form (CAIS) is a disorder of hormone resistance characterised by a female phenotype in an individual with an XY karyotype and testes producing age-appropriated normal concentrations of androgens. Pathogenesis is the result of mutations in the x-linked androgen receptor (AR) gene, which encodes for the ligand-activated AR. We report the clinical, biochemical and molecular features of two affected sisters in whom a nove...

Introduction: Thyroid dyshormonogenesis (TD) is a heterogeneous group of genetic diseases caused by the total or partial defect in the synthesis or secretion of thyroid hormones. It presents clinical heterogeneity, from subclinical hypothyroidism (SH) to goitre. The clearer understanding of the pathways and enzymatic activities involved in the synthesis of thyroid hormones has allowed us to identify an important number of causal genes. Defective organification...

Introduction: The thyrotropin receptor (TSHR) has a key role in the thyroid gland. It is involved in folliculogenesis, differentiation, organogenesis, and thyroid hormone synthesis and production. Its genetic defects can cause poor differentiation (thyroid dysgenesis) and/or thyroid malfunction (thyroid dyshormonogenesis, TD). Therefore, its phenotype spectrum is wide, ranging from severe congenital hypothyroidism (CH) to mild hyperthyrotropinemia. Some hetero...

Background: The MAMLD1 gene (Xp28) is thought to cause disorder of sex development (DSD) in 46, XY patients, mostly presenting with hypospadias, and, recently, also gonadal dysgenesis. However, there is some controversy about the role of MAMLD1 in sex development because i) some MAMLD1 variants are also detected in normal individuals, ii) others are not present in all affected DSD individuals of the same family; iii) several MAMLD1 mutations...

Introduction: Subclinical hypothyroidism (SH) is a biochemical condition characterized by serum levels of TSH above the reference range upper limit (4,5μUI/mL), with normal concentrations of thyroid hormones. In cases of non-autoimmune subclinical hypothyroidism (NASHT), genetic defects have been described and can determine disorders in the biosynthesis process of thyroid hormones, such as heterozygous mutations in the TSH receptor gene (TSHR) and ...

Background: IGF1 resistance syndrome (IGF1RS) is characterized by intrauterine and postnatal growth deficit with normal or supranormal IGF1 levels. Additional features may include intellectual deficit, microcephaly and dysmorphisms. IGF1RS may be caused by genomic or genetic defects affecting the IGF1R locus (15q26.3).Objective and hypotheses: To investigate the frequency of IGF1R mutations in a cohort of patients with pre- and/or postn...

Introduction: Dumping Syndrome (DS) has been recognized as a major complication of Nissen fundoplication in young children. Althougth other causes have been recognized. We describe a children with esophageal atresia who presented with late DS caused by a surgical complication, Dumping and Horner syndrome were diagnosticated after his surgery.Case description: A male newborn with prenatal diagnosis of right Aortic Arch was born by vaginal delivery, radiol...

Introduction: Growth hormone deficiency (GHD) is the most frequent endocrine deficit in childhood survivors of brain tumours. However, there is insufficient evidence to guide the timing of growth hormone replacement (GHR). At Great Ormond Street Hospital timing is based on clinical need rather than in relation to oncological treatment. Therefore, sufficient variability in GHR timing is available to analyze its effect on tumour progression and recurrence.<p...