ESPE Abstracts

Background: There is no agreement on the optimal treatment of children with vitamin D deficiency or insufficiency without obvious signs of rickets.Objective and hypotheses: To compare the efficacy and side effects of two different stoss therapy regimens (10 000 IU/kg and 300 000 IU vitamin D3) in children with vitamin D deficiency or insufficiency without rickets.Method: A total of ...

Background: Increased glycaemic variability (GV) (short-term fluctuations in blood glucose level) is associated with increased oxidative stress, vascular complications and mortality in diabetic and prediabetic patients.Objective and hypotheses: To investigate the relationship between GV and inflammatory markers in obese children with metabolic syndrome (MS) and insulin resistance (IR).Method: Fifty obese adolescents with insulin re...

Background: Subclinical hypothyroidism (SH) has an incidence of 3.2–22.2% in obese children. The etiology of increased prevalence of SH is still unclear in obese individuals.Objective and hypotheses: To investigate the relation of SH with iodine deficiency, serum leptin levels and metabolic parameters in obese children and adolescents.Method: One hundred and fifty nine obese and 54 healthy children and adolescents were include...

Background: Swyer syndrome (46,XY pure gonadal dysgenesis) is a rare disorder, which is characterized by female phenotype, female internal genitalia and fibrotic and primitive gonads. Classically, breast development and menstruation are absent due to hypergonadotropic hypogonadism.Objective and hypotheses: To our knowledge, three cases of Swyer syndrome with spontaneous breast development have been reported so far. In these reports, breast development wa...

Background: STAT5B deficiency is characterized by severe postnatal growth failure, low IGF1, elevated levels of GH and prolactin, and immunodeficiency. To date, only ten patients with seven different mutations have been described.Objective and hypotheses: Describe clinical characteristics of a novel homozygous frameshift mutation in STAT5B.Results: A 17-year-old female was referred for proportionate short stature and prima...

Background: Partial androgen insensitivity syndrome (PAIS) typically presents with micropenis, penoscrotal hypospadias, bifid scrotum with descending or undescending testes and gynecomastia. It is x-linked recessive disease resulting from mutations in androgen receptor (AR) gene.Objective and hypothesis: To present clinical characteristics of a novel mutation in the AR gene in an adolescent boy with PAIS who presented with gynecomastia ...

Introduction: Parathormone-related peptide (PTHrP) regulates tissue calcium concentration by acting in paracrine or autocrine ways. It is mostly responsible for paraneoplastic hypercalcemia seen in adults. Paraneoplastic hypercalcemia in children is rarely reported in cancers such as ALL, medulloblastoma and hepatoblastoma (0.4–0.7%). In experimental studies, PTHrP is shown to be synthesized apart from neoplastic tissue (glomerulus and tubule cells).<p class="abstext"...

Background and objective: The first and rate-limiting step of steroidogenesis is the conversion of cholesterol to pregnanolone which is catalyzed by the P450scc side chain cleavage enzyme (encoded by CYP11A1 gene-SCC). Homozygous recessive mutations of the CYP11A1 gene cause a global steroid hormone deficiency thereby disorders of sexual development in 46, XY individuals with a variable phenotype depending on the mutation characteristics. About 60 cases of SCC...

Background: There exists limited data regarding genetic etiology of hypophosphatemic rickets in Turkey.Objective and hypotheses: To investigate the type of genetic defect in 16 index children and their families (12 unrelated, 1 related).Method: Following clinical and laboratory assessment, PHEX analysis was made initially unless a mutation in another gene was suspected. If negative, FGF23, SLC34A3, SL...

Background: Recently, the first patients with resistance to thyroid hormone (RTHα) due to inactivating mutations in TRα1 have been identified. These patients are characterized by growth retardation, delayed bone development, mild cognitive defects, delayed motor development and abnormal thyroid function tests.Objective and hypotheses: We hypothesized that the phenotype of a TRα mutation depends on its location, e.g. if it is present only i...