ESPE Abstracts

Background: Neonatal hypocalcemia is defined when the total calcium levels are under 8 mg/dl (Ionic Ca < 1.1 mmol/l) in the full-term newborn, and under 7 mg/dl (Ionic Ca < 1 mmol/l) in the preterm. The fetus entirely depends on the maternal contributions of 25-OH-vitamin D, whose levels are directly correlated with diet and solar exposure. The largest transfer in calcium and vitamin D occurs in the third trimester of gestation, so prematurity is an important risk fact...

Introduction: We describe a 4 month old term infant of a vitamin D deficient mother who presented with bronchopneumonia and cardiomegaly needed respiratory support. Despite resolution of bronchopneumonia he had persistent normal anion gap metabolic acidosis. In the process of investigating into symptomatic hypocalcaemia revealed rickets with 25-hydroxy-vitamin D (Vit D) deficiency and high parathyroid hormone (PTH) which led to distal renal tubular acidosis. B...

Background: Evidence of the association between vitamin D, insulin resistance and oral disposition index (oDI) in obese children and adolescents is limited.Objective and hypotheses: We investigated serum 25(OH)D levels in obese children and adolescents in Zhejiang, China, and determined the relationship between serum 25(OH)D and glucose metabolism.Method: A cross-sectional design was used. All together 348 obese and 445 non-obese c...

Background: Vitamin D deficiency in children clinically manifests as rickets causing growth impairment and bowing of the long bones, potentially increasing the ratio between crown-rump length and length (CRL:L) or sitting height and height (SH:H).Objective and hypotheses: We investigated whether CRL:L in 19-months-olds and SH:H in 36-months-olds were lower with higher cord 25hydroxyvitamin D (25OHD).Method: Participants were includ...

Background: Vitamin D dependent type 1 rickets is a rare, autosomal-dominantly inherited disorder due to an inactivating mutation in CYP27B1 (25-OH vitamin D-1-α-hydroxylase) gene. It is characterized by early onset of rickets with hypocalcemia. We report a boy admitted with symptoms of hypocalcemia and who carried a novel mutation in CYP27B1 gene.Case: The patient was admitted with tetany at the age of 12 months. When he had his first convulsion, h...

Objective: To determine the prevalence of congenital hypothyroidism (CH) in children with dry bloodspot TSH (b-TSH) between 5 and 10 mIU/l in neonatal screening and evaluate their thyroid function evolution.Methods: Retrospective study of thyroid function in children born from 2003 to 2010 with b-TSH between 5 and 10 mIU/l who were put on treatment in the first two years of life due to serum TSH≥10 mIU/l. The prevalence of CH ...

Introduction: Vitamin D-dependent rickets type I (OMIM # 264700) is a rare autosomical recessive disorder that affects vitamin-D metabolism characterized by severe hypocalcaemia with moderate hypophosphatemia. The most common form is type IA, caused by the mutation of gene coding for 1-alpha-hydroxylase (CYP27B1OMIM * 609506. 12q14) that converts the 25-OH-vitaminD in 1,25-OH-vitaminD.Case report: A 2.3 years female with...

Introduction: Vitamin D (VitD) is a prohormone that is synthesized in the skin after sun exposure. Mandatory lockdown during the COVID-19 Pandemic may have altered the sun exposure time of children.Aim: to evaluate vitD levels in a sample of children and adolescents, and compare between pre-pandemic and pandemic periods.Methoths Children and adolescents, from a Portuguese tertiary ...

Background: Fibroblast growth factor 21 (FGF-21) is a complex molecule involved in lipid and glucose metabolism. FGF-21 shares biochemical pathways and sites of action with thyroid hormones. Current data correlate FGF-21 levels to thyroid function. The aim of the present study was to investigate possible associations among FGF-21 levels, resting metabolic rate (RMR), lipidemic profile and L-thyroxin replacement therapy treatment in children and adolescents wit...

Background: In both asthma and vitamin D deficiency is common. The results from studies examining the relationship between them is contradictory.Objective and hypotheses: The aim of this study was to investigate the relationship vitamin D levels and clinical parameters of asthma in children.Method: One hundred twenty children with asthma, followed up in Pediatric Allergy and Immunology Department were included. Seventy-four childre...