ESPE Abstracts

Background: Primary hypothyroidism is frequently associated with delayed puberty. However, precocious puberty is known to occur in some rare cases of hypothyroidism untreated for a long time. Differently from the cases suffering from precocious puberty due to other causes, linear growth and bone age are retarded in children developing precocious puberty associated with hypothyroidism. There are no definite data about the incidence of precocious puberty associated with hypothyr...

Background: Hypophosphatemic rickets is a clinical picture with inadequate bone mineralization that develops following renal phosphate loss. One of the most common complications in this group of patients is nephrocalcinosis. However, the mechanisms causing nephrocalcinosis are not clear.Objective and hypotheses: The aim of our study was to define the risk factors affecting the development of nephrocalcinosis, which is reported to be seen at a rate of 50%...

Background: 17β-Hydroxysteroid dehyrogenase type 3 (17βHSD-3) deficiency is an autosomal recessive form of 46,XY disorder of sex development (DSD). 17βHSD-3 is present almost exclusively in the testes and converts androstenedione to testosterone. The diagnosis can be easily missed in early childhood as the clinical presentation may be subtle. The most frequent presentation of 17βHSD-3 deficiency is a 46,XY individual with female external genitalia, labial f...

Introduction: Complete androgen insensitivity syndrome (CAIS) is a sexual development disorder due to mutations that cause function loss in androgen receptors in 46, XY individuals. The risk of malignancy development until the age of 25 years in CAIS is 5–10%. We present a CAIS case where a Sertoli cell tumour was found, together with the USG and MR findings.Case: A 17-year-old female presented to our department complaining of amenorrhoea. She had a...

Introduction: Brain-lung-thyroid syndrome (BATS) is a rare autosomal dominant inherited syndrome that develops due to mutations in the NKX2-1 gene, which is a thyroid transcription factor, and is characterized by respiratory distress in the neonatal period, congenital hypothyroidism, and choreatetosis. Approximately half of affected patients have the complete triad, with 30% affected by the neurological phenotype (motor developmental delay, gait difficulties, choreatetosis, hy...

Introduction: Congenital adrenal hyperplasia (CAH) is an autosomal recessive disorder. Diagnosis, monitoring of treatment, adjustment of drug doses are important for height, puberty and psychologic status of patients and their families.Materials & Methods: Patients with classical CAH due to 21-hydroxylase deficiency who were followed regularly in pediatric endocrinology clinic between 1994 and 2019 were included in this study. Inform...

Introduction: Steroid hormone biosynthesis is initiated by the cholesterol side-chain cleavage enzyme (P450scc), which converts cholesterol to pregnenolone, the precursor of all steroid hormones. This enzyme is encoded by the CYP11A1 gene and is responsible for glucocorticoid, mineralocorticoid and sex steroid synthesis in the adrenal glands, gonads and placenta. Early or late onset adrenal insufficiency, 46, XY sex development disorder, and hypergonadotropic ...

Background: Heterozygous inactivating mutations in the calcium sensing receptor (CaSR) gene cause mild hypercalcemia, normal to slightly elevated parathormone (PTH) levels and may vary from an asymptomatic clinical picture to a mild course. This clinical picture is also called familial hypercalcemic hypocalciuria. In this study, it is aimed to present two sibling cases due to CaSR mutation with interesting features.Case...

Background: Glucose 6 phosphate dehydrogenase (G6PD) is expressed in all tissues and is necessary for the oxidant stress capacity of cells. G6PD deficiency is the most common enzymopathy in humans; it is among the important causes of hemolytic anemia. It has been reported that severe hemolytic anemia due to G6PD deficiency may develop in newly diagnosed diabetes, especially during the correction of hyperglycemia. To date, 9 cases have been described in the lit...

Introduction: Noonan Syndrome (NS) is a heterogeneous group of diseases with a genetic etiology affecting the RAS/MAPK signaling pathway known as RASopathy. Genes known to cause NS are PTPN11, KRAS, SOS1, RAF1, BRAF, SHOC2 and RIT1. There are sufficient studies indicating that recombinant growth hormone (rhGH) therapy can be given without increasing risk of developing cancer in NS cases with PTPN11 mutations from different centers. In this study, it was aimed ...