ESPE Abstracts

Background: The pituitary set-point for TSH synthesis and secretion is known to be an individual parameter with a strong genetic influence. Type II iodothyronine deiodinase is a pituitary enzyme involved in local deiodination of T4 and negative feed-back loop for TSH secretion. Defects in DIO2 have not been reported in humans; however, Dio2 knockout mouse has pituitary resistance to T4 with elevated TSH, T4 and TSH/T4 ratio, with nor...

Background: Iodotyrosine deiodinase (DEHAL1) is a thyroidal enzyme that deiodinates mono- and diiodtyrosines (MIT, DIT) and recycles iodine, essential for synthesis of thyroid hormone. Iodotyrosine deiodinase deficiency leads to hypothyroidism, goiter and variable mental retardation. The age for clinical onset was reportedly very diverse, allegedly related to individual iodine nutrition.Clinical case: We report on a boy, offspring of consanguineous paren...

Objectives: -To determine children diagnosed with central congenital hypothyroidism (CCH) by a screening program using TSH and total T4 between May 2016 and January 2019.-To analyze the characteristics of the disease in these children.Material and Methods: During the time of the study, 14.743 newborns have been screened. Cut-off points are used for TSH ≥10MU/ml and T4 6 and 20 mg/dl as lower ...

Background: HABP2 is an extra-cellular matrix protein involved in cell proliferation. Recently, HABP2 was proposed as responsible for the familial clustering of Differentiated Thyroid Carcinoma (FDTC). However, its involvement was questioned by subsequent studies revealing high prevalence HAPB2 polymorphisms (SNPs) in the general population, leaving its pathogenic role uncertain.Objective and hypotheses: To identify genetic HABP2</e...

Background: Genetic defects in NKX2.1 (chromosome 14q13) are associated with hypothyroidism, choreo-athetotic movements and respiratory distress, known as the “Brain-Lung-Thyroid syndrome”.Objective and hypotheses: To identify the genetic basis of a disorder compatible with the “NKX2.1 syndrome” and extra features outside the typical triad.Patients and methods: 10-year old girl with congenital ...

Background: The inheritable component of familial Papillary Thyroid Cancer (fPTC) was recently attributed to monogenic defects in a reduced number of genes including DICER1. DICER1 codes for a ribonuclease of the RNaseIII family essential for the biogenesis of microRNAs.Objective and hypotheses: We aimed to identify germline and/or somatic mutations in DICER1 in a familial pedigree with PTC, multinodular goiter (MNG) and other ...