ESPE Abstracts

Background and aim: Per- and polyfluoroalkyl substances (PFAS) are a group of synthetic chemicals found in everyday consumer products. These chemicals are considered endocrine disruptive. However, their effect on pubertal onset and development is still unclear. The aim of the current study was therefore to explore the relationship between PFAS exposure and pubertal development using novel objective pubertal phenotyping, e.g., ultrasound-determined testicular v...

Purpose: X-linked hypophosphatemia (XLH) is the most common hereditary cause of hypophosphatemic rickets. Elevated circulating levels of fibroblast growth factor 23 (FGF23) caused by mutations in the PHEX gene lead to renal phosphate wasting and rickets. Conventional treatment with phosphate salts and active vitamin D is associated with nephrocalcinosis in XLH patients. Mice on a high phosphate diet develop proximal tubular injury. Detailed analysis on kidney ...

Objective: To study the effect of orexin deficiency on metabolic and pubertal characteristics in narcoleptic children, we compared the metabolic and pubertal alterations between 15 children with narcolepsy with cataplexy (NC) and 15 control children matched for age, body mass index (BMI) z score.Method: Narcoleptic data were collected from the Reference Center for Narcolepsy and control common obese data from the department of pediatric endocrinology in ...

Introduction: Thyroid dyshormonogenesis (TD) is a heterogeneous group of genetic diseases caused by the total or partial defect in the synthesis or secretion of thyroid hormones. It presents clinical heterogeneity, from subclinical hypothyroidism (SH) to goitre. The clearer understanding of the pathways and enzymatic activities involved in the synthesis of thyroid hormones has allowed us to identify an important number of causal genes. Defective organification...

Background: Gonadal hyperfunction is the most frequent endocrine dysfunction in females with McCune–Albright syndrome (MAS), and precocious puberty (PP) is usually the first manifestation of MAS in children.Objective and hypotheses: The optimal pharmacologic treatment of PP in girls with MAS has not been yet identified and new therapeutic options like anti-estrogen should be taken under consideration especially in patients with extreme high estradio...

Background: One of the crucial aspects of the management of disorders of sex development is the assessment of the risk of malignant transformation of a dysgenetic gonad.Objective and hypotheses: The PCR analysis of germ-cell risk factors as the presence of the TSPY gene may be helpful in decision making of an early gonadectomy.Results: We report a 46,Xdel(Y)p11.3 girl with gonadal dysgenesis, that was referred to the Depar...

Background and Aims: Central Precocious Puberty (CPP) caused by the early activation of the hypothalamic-pituitary-gonadal axis is a rare affection that occurs in 0.2% in girls. Clinical signs are suggestive and LHRH-test could be sometimes difficult to use and not always contributive. Gonadotropin assay in twenty-four hours-urinary collection could be an interesting option. The present work intended to evaluate the diagnostic interest of 24-hour urinary gonad...

Management of patients presenting a chronic endocrine or metabolic disease during transition period is a challenge for multiple reasons. The department of Adult Endocrinology and Reproductive Medicine in Pitie Salpêtrière Hospital, Paris has been involved in the management of such patients for many years. However, in our own experience, 81% of patients are still followed-up after 1 year, 71% after 3 years and only 49% after 5 years. Based on such experience, we decid...

Introduction: Subclinical hypothyroidism (SH) is a biochemical condition characterized by serum levels of TSH above the reference range upper limit (4,5μUI/mL), with normal concentrations of thyroid hormones. In cases of non-autoimmune subclinical hypothyroidism (NASHT), genetic defects have been described and can determine disorders in the biosynthesis process of thyroid hormones, such as heterozygous mutations in the TSH receptor gene (TSHR) and ...

Background: In a large fraction of patients with clinically presumed Androgen Insensitivity Syndrome, no mutation of the Androgen Receptor gene can be detected. However, established Sanger sequencing techniques of the AR gene are often limited to the coding region.Objective and Hypotheses: To set up a next generation sequencing (NGS) approach of the entire AR locus (including UTRs, exons, introns, up- and downstream regions) for a comprehensive ...