ESPE Abstracts

Background and hypothesis: The neonatal period is characterized by high urinary sodium loss, most notably in preterm infants that questions the ability of the mineralocorticoid pathway to maintain sodium homeostasis.Results: We have demonstrated that neonatal sodium wasting is associated with a physiological renal aldosterone resistance in relation to a low renal mineralocorticoid receptor (MR) expression at birth in full-term infants, both in humans and...

Background: Unlike term neonates, known to exhibit a physiological pseudohypoaldosteronism, very preterms (VPT) display a high sodium waste at birth with partial aldosterone deficiency. This context, combined with a low aldosterone/renin ratio is highly suggestive of a defect in mineralocorticoid biosynthesis.Objectives and hypotheses: To investigate mineralocorticoid and glucocorticoid pathways in newborns, and to clarify the impact of prematurity upon ...

Background: Neonatal Cushing syndrome is a rare and severe condition, mostly associated with the McCune-Albright (MCA) syndrome. Management options include medical treatment (with ketoconazole or metyrapone resulting in 11-beta-hydroxylase blockade) and radical treatment with bilateral adrenalectomy. Spontaneous regression in late infancy has been reported.Objective and hypotheses: To report on the outcome of a 14 month-old girl with severe neonatal Cush...

Background: Hyponatremia is one of the most common electrolyte disorders in hospitalized children and early diagnosis and management are crucial to prevent morbidity and mortality. Because of the physiological resistance to aldosterone under 3 months of age, the mechanisms leading to hyponatremia are often misunderstood.Objective and hypotheses: To assess the prevalence of hyponatremia in hospitalized infants younger than 100 days and evaluate the mechan...

Background: Boys with delayed puberty represent one of the main cause for pediatric endocrine referrals. Although the majority of them have constitutional delay of growth and puberty (CDGP), it is important to identify isolated hypogonadotropic hypogonadism (IHH) for optimal management.Objective and hypotheses: The aim of the study was to evaluate the usefulness of inhibin B and AMH as biological markers for distinguishing between CDGP and IHH.<p cla...

Background: Brain MRI is an essential tool in the diagnosis of neuroendocrine disorders and aims at detecting anatomical abnormalities and tumors. However, it may lead to the identification of unrelated or questionably related abnormalities in the hypothalamic-pituitary region and/or the rest of the brain parenchyma.Objective and hypotheses: To establish the prevalence of causal lesions on brain MRI of children evaluated for hypopituitarism, assess the f...

Background: Tubular immaturity, responsible for sodium wasting, is critical during the neonatal period, particularly in preterm neonates. This relates to partial renal aldosterone resistance (Martinerie, Ped Res 2009), coincident with low tubular expression of the mineralocorticoid receptor in newborns (Martinerie, Endocrinology 2009).Objective and methods: Our clinical trial (NCT01176162) aimed to assess aldosterone resistance in neona...

Context: Newborns with Congenital hypogonadotropic hypogonadism (CHH) have an impaired postnatal activation of the gonadotropic axis. Substitutive therapy with recombinant gonadotropins can be proposed to mimic physiological male mini-puberty during the first months of life.Objective: To retrospectively compare the clinical (penile size, volume and testicular descent) and biological efficacy (serum concentrations of test...

Introduction: Prematurity, a worldwide health issue, is often associated with renal tubular immaturity leading to major salt loss, whose mechanisms remain poorly understood. Moreover, these premature infants are prone to develop hypertension early in adulthood.Objective: To study the ontogenesis of renal mineralocorticoid and glucocorticoid signaling pathways in preterm infants and to evaluate their respective role during neonatal adaptation and in the e...

Background: For adult patients who do not meet indications to surgery, the calcimimetic cinacalcet is approved for primary hyperparathyroidism (HPT), decreasing calcium and parathyroid hormone (PTH) levels. This drug is largely used in adults, but may be a challenge in daily practice in children, because of the risk of hypocalcemia, increased QT interval and drug interactions. A few pediatric cases have highlighted its potential interest in children with HPT; ...