ESPE Abstracts

Background: Neonatal vitamin D deficiency (VDD) can result in symptomatic hypocalcemia, seizures and cardiomyopathy and has been associated with reduced bone mineralization in childhood, but is potentially preventable with antenatal cholecalciferol supplementation. Single nucleotide polymorphisms (SNP) in the vitamin D metabolism pathway are associated with serum 25-hydroxyvitamin D [25(OH)D] in adulthood. We assessed whether maternal and/or offspring SNPs in ...

Background: In humans, the GHN gene transcription is under the control of a Locus Control Region (LCR) enhancer, HSI, located 14.5 kb 5′ to the hGHN promoter. POU1F1, a pituitary-specific transcription factor, plays an essential role in the specification of the somatotroph, lactotroph and thyrotroph lineages and the activation of GHN, PRL and TSH gene transcription. All POU1F1 mutations so far reported have been linke...

(DPG)-plus syndrome is a rare craniofacial anomaly. It usually occurs in combination with other craniofacial defects. The etiology of this condition remains unknown. Survivors to late childhood have either preserved pituitary function or central precious puberty. Idiopathic infantile hypercalcemia (IHH) is another rare condition that predominantly affects infants. The co-occurrence of (DPG)-plus syndrome and IIH has not been reported previously. We will also present a case rep...

Introduction: 17q12 deletion syndrome is associated with an enlarging phenotype, the most frequent clinical findings being renal and genitourinary malformations, diabetes mellitus (β-cell developmental defect) and exocrine pancreas deficiency, variable cognitive impairment with dysmorphic features.Diabetes, known as MODY 5 (maturity-onset diabetes of the young), is an autosomal dominant monogenic type and the most commonly identi...

Introduction: Legg-Calvé-Perthes disease is an idiopathic osteonecrosis of the femoral head with uncoupling of bone resorption and formation, presenting as unilateral involvement in most children. Symmetric involvement suggests other conditions: skeletal dysplasia, osteonecrotic entities including hypothyroidism, Gaucher's disease, glycogen storage defects, sickle cell anemia.Case presentation: We present a case...

Background: Pseudohypoaldosteronism (PHA) is a rare entity inducing, in case of late or missed diagnosis, life-threatening clinical and biochemical complications.Objective and hypotheses: To report a case of 4-week-old boy with failure to thrive, dehydration, hyponatremia, hyperkalemia, metabolic acidosis. The first diagnosis was congenital adrenal hyperplasia, but in the evolution, the right diagnosis of PHA was retained.Method: T...

Background: Noonan syndrome (NS) is an autosomal-dominant inherited condition defined clinically by a short stature, specific phenotype, congenital heart disease, bleeding and hematologic abnormalities (particularly leukaemia). There is also a genetic heterogeneity, with all mutations involved in the RAS/mitogen-activated protein (MAP) kinase pathway and with PTPN11 gene mutations counting for almost 50% of patients.Objective and hypotheses: To describe ...

Background: Precocious puberty, pubertal development in girls before 8 years, has considerable biological, psychosocial, and long-term health implications. It is classically ascribed to the premature activation of the hypothalamic-pituitary–gonadal axis, and hence an LH response >5 U/l in the LHRH test. Whilst this group of patients is well understood, there is a paucity of literature characterising patients who show pubertal development not driven by LH, atypical pre...

Objective: This project aims to evaluate the effect of two isotopically labelled internal standards on the quantification of 17OHP by liquid chromatography-tandem mass spectrometry (LC-MS/MS) and gas chromatography-tandem mass spectrometry (GC-MS/MS) as an orthogonal technique.Methods: Three LC-MS/MS and one GC-MS/MS laboratories, spanning four countries worldwide, who routinely measure serum17OHP, compared two internal ...

Objective: This project aims to evaluate the effect of two isotopically labelled internal standards on the quantification of 17OHP by liquid chromatography-tandem mass spectrometry (LC-MS/MS) and gas chromatography-tandem mass spectrometry (GC-MS/MS) as an orthogonal technique.Methods: Three LC-MS/MS and one GC-MS/MS laboratories, spanning four countries worldwide, who routinely measure serum17OHP, compared two internal ...