hrp0086p1-p900 | Thyroid P1 | ESPE2016

Meta-analysis of Children with Multiple Endocrine Neoplasia (MEN) Type 2A from 1995-2014: Impact of RET Mutation Screening on Age at Thyroidectomy and Frequency of Metastatic Disease

Burckhardt Marie-Anne , Zumsteg Urs , Szinnai Gabor

Background: Medullary thyroid cancer (MTC) in MEN 2A is caused by mutations in RET. Guidelines (2001/2009/2015) recommend prophylactic total thyroidectomy (TT) based on mutation specific risk levels (ATA 2015: high/moderate).Objective: The aim of this study was to analyse changes of age at TT, frequency of metastatic MTC (MMTC), and frequency of TT according to guidelines since introduction of RET testing in 1995....

hrp0092p1-29 | Diabetes and Insulin | ESPE2019

What Hypoglycemia Does to the Heart: Impact of Nocturnal Hypoglycemia on Cardiac Repolarization in Diabetic Children

Bachmann Sara , Auderset Anne , Zumsteg Urs , Szinnai Gabor , Donner Birgit

Background: Hypoglycemia is the most common and most feared complication of insulin treated diabetes. Though mostly asymptomatic, nocturnal hypoglycemia can be fatal in rare cases: sudden nocturnal death is more frequent in diabetic patients than in others. It is postulated that hypoglycemia related QTc prolongation contributes to cardiac arrhythmia and can lead to dead in bed.Objective: To evaluate influence of nocturna...

hrp0082p2-d2-525 | Pituitary (1) | ESPE2014

Challenging Treatment of Gigantism in a Boy with McCune–Albright Syndrome

Hess Melanie , Bachmann Sara , Szinnai Gabor , Zumsteg Urs

Background: McCune–Albright syndrome (MAS) is a complex disorder characterized by the triad of fibrous dysplasia of multiple bones, café-au-lait skin macules and endocrinopathies.Objective and hypotheses: Long-term treatment of a boy with gigantism due to MAS.Method: Case report.Results: We present the clinical course of a now 14 years old boy with MAS and GH excess, clinical signs of precocious pub...

hrp0084p1-130 | Thyroid | ESPE2015

Brain-Lung-Thyroid Syndrome – Update on the Clinical Spectrum of a Heterogeneous Disorder

Lenherr Nina , Vuissoz Jean-Marc , Heinimann Karl , Szinnai Gabor

Background: Brain-lung-thyroid syndrome (BLTS, OMIM# 610978) is caused by mutations in the NK2 homeobox 2 (NKX2-1; TTF1) gene affecting the three NKX2-1 expressing organs brain, lung and thyroid. The syndrome is characterized by benign hereditary chorea (BHC), infant respiratory distress syndrome (IRDS) and congenital hypothyroidism (CH). However, the clinical spectrum and severity of symptoms vary widely. Regarding the increasing number of published mutations and het...

hrp0084p3-592 | Adrenals | ESPE2015

Atypical Prednisone-Metabolism: Pharmacological Studies in a Boy with Classical Adrenal Hyperplasia and Suspected Malcompliance

Hess Melanie , Derungs Adrian , Zumsteg Urs W , Szinnai Gabor

Background: We present a boy with classical adrenal hyperplasia (CAH) and constantly increased 17-OH-progesterone (17-OH-P) values despite multiple dose adjustments of hydrocortisone up to 18 mg/m2 body surface and addition of fludrocortisone. After puberty, therapy was changed from hydrocortisone to prednisone without improvement of the 17-OH-P values. Non-compliance was suspected as cause of the inadequately controlled CAH. Alternatively, an atypical steroid metab...

hrp0089rfc5.6 | Thyroid | ESPE2018

DUOX2 Deficiency in Quebec: From Life-Threatening Compressive Goiter in Infancy to Lifelong Euthyroidism

Dufort Gabrielle , Larrivee-Vanier Stephanie , Eugene Dardye , De Deken Xavier , Heinimann Karl , Szinnai Gabor , Van Vliet Guy , Deladoey Johnny

Background: Congenital hypothyroidism (CH) caused by DUOX2 deficiency has a wide range of clinical presentations and phenotype-genotype correlations are not always straightforward.Objective: To describe four children from Quebec with biallelic DUOX2 variants and widely variable phenotypes.Design/Methods: Case series of four children seen for evaluation of thyroid function at the endocrinology service of two university hospitals in ...

hrp0092fc7.2 | Diabetes and Insulin Session 2 | ESPE2019

Copeptin Kinetics and its Relationship to Osmolality During Rehydration for Diabetic Ketoacidosis in Children: An Observational Study

Burckhardt Marie-Anne , Beglinger Svetlana , Gotta Verena , Renggli Luzia , Bachmann Sara , Hess Melanie , Rentsch Katharina , Koch Gilbert , Zumsteg Urs , Jones Timothy , Pfister Marc , Szinnai Gabor

Background: Copeptin is a surrogate marker for arginine vasopressin (AVP) release in response to hyperosmolal stimuli such as diabetic ketoacidosis (DKA). We aimed to characterize the temporal course (kinetics) of serum osmolality and copeptin during rehydration and insulin therapy in children with type 1 diabetes (T1D) and DKA, and the relationship between both (dynamics).Methods: An observational multi-center study was...

hrp0094fc4.3 | Diabetes | ESPE2021

Aldosterone and pro-atrial natriuretic peptide kinetics in response to rehydration in children with diabetic ketoacidosis

Burckhardt Marie-Anne , Otto Marije , Gotta Verena , Beglinger Svetlana , Bachmann Sara , Hess Melanie , Rentsch Katharina , Koch Gilbert , Davis Elizabeth , Zumsteg Urs , Jones Tim , Pfister Marc , Szinnai Gabor ,

Background: Diabetic ketoacidosis (DKA), a frequent complication of type 1 diabetes (T1D), is characterized by hyperosmolar hypovolemia. The response of water-regulating hormones to DKA treatment in children is not well known. While arginine vasopressin (AVP) is thought to respond to changes in osmolality, aldosterone and atrial natriuretic peptide (ANP) are expected to respond to volume changes (dehydration and overhydration, respectively). The objective of t...

hrp0094p2-453 | Thyroid | ESPE2021

Kinetics of FT4 serum concentrations in newborns and infants with congenital hypothyroidism during follow-up differ in the three severity groups

Steffens Britta , Gächter Pascal , Koch Gilbert , l'Allemand Dagmar , Janner Marco , Konrad Daniel , Welzel Tatjana , Pfister Marc , Szinnai Gabor

Background: The goal of congenital hypothyroidism (CH) treatment is rapid normalization and maintenance of TSH and FT4 in the reference range. Recommended starting dose of levothyroxine (LT4) ranges from 10-15 mg/kg/d. Hyperthyroxinemia can be accepted in the context of normal TSH and LT4 should only be reduced in case of symptoms or repeatedly increased FT4. The aim of this study was to quantify duration and maximum peak of FT4 levels outside the reference range for each CH s...

hrp0089fc5.1 | Thyroid | ESPE2018

Beta1-Tubulin Gene (TUBB1) Mutations Cause Thyroid Dysgenesis Associated to Abnormal Platelet Morphology and Hyper-Aggregation

Carre Aurore , Stoupa Athanasia , Adam Frederic , Kariyawasam Dulanjalee , Strassel Catherine , Gawade Sanjay , Szinnai Gabor , Kauskot Alexandre , Lasne Dominique , Janke Carsten , Natarajan Kathiresan , Schmitt Alain , Bole-Feysot Christine , Nitschke Patrick , Leger Juliane , Jabot-Hanin Fabienne , Tores Frederic , Michel Anita , Munnich Arnold , Besmond Claude , Scharfmann Raphael , Lanza Francois , Borgel Delphine , Polak Michel , Federation Parisienne pour le Depistage et la Prevention des Handicaps de l'Enfant FPDPHE Michel

Background: Congenital hypothyroidism (CH) is the most common neonatal endocrine disorder, with an incidence of 1:3000 neonates, and one of the most frequent preventable causes of mental retardation worldwide. Most (65%) cases of primary permanent CH are due to thyroid dysgenesis (TD). However, a genetic cause is identified in less than 5% of CH due to DT.Methods: We performed WES (Whole Exome Sequencing) for siblings with childhood-onset TD and we analy...