ESPE Abstracts

Background: Hereditary hypophosphatemic rickets with hypercalciuria(HHRH; OMIM: 241530) is a rare autosomal recessive disorder,which is the result of loss-of-function mutations in the sodium-phosphate-cotransporter NPT2c.This disorder is characterized by renal phosphate(Pi) wasting,hypercalciuria,increased 1,25 (OH)2-D levels and decreased parathormone(PTH) levels.Here we report the clinical features of two siblings with HHRH,confirmed with molecula...

Background/Aim: Gender identity disorder (GID) is a condition, which is characterized by incongruence between experienced gender and the natal-sex, which also causes deterioration of functionality. After psychiatric evaluations, medical treatment for adolescents with GID consists of 3 phases. First phase is the suppression of puberty with GnRH-analogues, which may be considered to be supporting the diagnostic process. In the second phase, cross-sex steroid hor...

Introduction: Short stature is a multifactorial condition caused by both genetic and environmental factors. Genetic causes include chromosomal disorders and diseases inherited by monogenic and multifactorial inheritance. The purpose of genetic evaluation in short stature is not only for diagnosis, but also to provide additional information to the patients and their families about prognosis of the disease, treatment approaches and genetic counseling.<p clas...

Background: Congenital hypothyroidism(CH) is the most common neonatal endocrinological disorder in the world. Although most of the CH is sporadic, some genetic defects are responsible from the etiology. The aim of this study was to determine the genetic and etiological factors of CH.Methods: 49 patients(female;n=24), from 24 families were included in the study. The data, collected retrospectively, consisted ...

Background: Monogenic defects are among the significant causes of early-onset non-syndromic severe obesity in childhood. Identifying the genetic cause of obesity can guide for treatment. The aim of our study is to investigate the clinical and biochemical features of patients with early-onset severe obesity and evaluate the underlying molecular diagnosis.Materials and Methods: A total of 39 patients (M/F: 22/17) with non-...

Background: Desert Hedgehog (DHH) gene acts on early testicu-lar development, testis cord formation and differentiation of fetal Leydig cells. It also has a role in nerve sheath formation. DHH gene mu-tations is a very rare cause of 46,XY gonadal dysgenesis (GD). Gonadal tumors and peripheral neuropathy have been associated with DHH mutations.Aim: To present three patients with 46,XY GD due to novel homozygous DHH muta...

Background: 17β-Hydroxysteroid Dehydrogenase3 (17b-HSD3) deficiency is a rare autosomal recessive disorder, caused by a mutation of the HSD17B3 gene. The phenotypic spectrum ranges from normal-appearing female external genitalia to microphallus with hypospadias and variable degrees of genital ambiguity. 17b-HSD3 deficiency phenotype is variable, leading to misdiagnosis especially with partial androgen insensitivity syndrome and 5alfa reductase deficiency.<p c...

Background: The most common reason for the increased mortality and morbidity in TS, which results from partial or complete deficiency of an X chromosome in a female, is acquired cardiovascular disease, which is the result of endothelial dysfunction that causes atherosclerosis. Endocan, an inflamatory marker, has been found elevated in several diseases with endothelial dysfunction (ED). There is no study of endocan levels in TS.Ob...

Background: Osteoporosis-pseudoglioma syndrome (OPPG), rare autosomal recessive entity, is characterized by juvenile osteoporosis, bone deformities, neuromotor retardation, and congenital blindness. This syndrome is due to the loss-of-function mutation in LRP5 (Low-density lipoprotein receptor-related protein 5). Here report four cases from three families, with confirmed molecular diagnosis who showed improvement of osteoporosis improved with biphosphonate therapy.<p class...

Introduction: Growth hormone (GH) treatment is used to accelerate growth in patients with Turner syndrome (TS). During treatment, evaluation of IGF-1 is strongly recommended for efficacy and safety. Some patients, despite optimum GH doses, have persistent high IGF-1 levels. In this study, we aimed to evaluate the relationship between IGF-1 levels, IGF1R and growth responses of TS patients on GH treatment.Method: 54 patie...