ESPE Abstracts

Background: NSIAD is a rare genetic cause of hyponatremia, due to activating mutations in AVPR2 gene, encoding the Arginine Vasopressin Receptor Type 2, and located on Xq28. Of the fewer than 30 reported cases, most have been managed with fluid restriction and urea.Objective and hypotheses: Illustration of the presentation of a family with this genetic abnormality and approach to management.Method: The clinical, biochemical and gen...

Background: Congenital hypothyroidism (CH) caused by DUOX2 deficiency has a wide range of clinical presentations and phenotype-genotype correlations are not always straightforward.Objective: To describe four children from Quebec with biallelic DUOX2 variants and widely variable phenotypes.Design/Methods: Case series of four children seen for evaluation of thyroid function at the endocrinology service of two university hospitals in ...

Background and Objectives: Enlargement and cystic changes in ovaries of patients with longstanding overt hypothyroidism has been observed in numerous case reports. But there is limited data about the effect of subclinical hypothyroidism (SH) on ovarian volume and ovarian cyst formation. We evaluated the relationship between serum thyroid stimulating hormone (TSH) level and ovarian volume and sonographic appearance in prepubertal girls with SH.<p class="abs...

In Belgium, neonatal TSH screening for congenital hypothyroidism has been performed between day 3 and 5 of life since the late seventies. In January 2015, a policy of early discharge of healthy neonates was implemented so that the neonatal screening strategy had to be adapted. Between January 2015 and September 2019, dried blood spot sampling was mostly collected at home AFTER discharge at 72 h of life (Newborn Screening Strategy 1 (NBS1)). After October 2019, sampling was mos...

Background: Central hypothyroidism is rare in children. It is often part of multiple pituitary hormone deficiency but can occur in isolation. Isolated central hypothyroidism may be due to mutations in TSHB, TRHR or IGSF1, involved in TRH signalling. We present an adolescent with a novel truncating variant of IGSF1, resulting in delayed puberty, central hypothyroidism and macroorchidism.Case presentation: A 15-year-old ma...

Background: ROHHADNET syndrome is characterised by rapid onset childhood obesity, hypoventilation, variable hypothalamic-pituitary and autonomic dysfunction, and neuroendocrine tumors in 30–40%. Autoimmunity and paraneoplastic syndrome have been proposed as possible pathophysiological mechanisms, but the exact aetiology remains unclear.Objective and hypotheses: We present the clinical course of ROHHADNET syndrome in a 17-year-old girl, with consecut...

Objectives: To evaluate the effect of combined treatment with GnRH analogue (GnRHa) and recombinant human GH (rhGH) on the linear growth in mid/late pubertal girls at great bone ages with central precocious puberty (CPP) or early and fast puberty (EFP). To investigate the relation between C-type natriuretic peptide (CNP) signaling pathway and GH’s effect on linear growth in these girls. Methods 22 girls were diagnosed as CPP or EFP, whose bone ages were older than 11.5 ye...

Background: Persistent Müllerian Duct Syndrome (PMDS) needs to be considered in boys (46, XY) presenting with bilateral cryptorchidism or unilateral cryptorchidism associated with an inguinal hernia. Anti-Müllerian hormone (AMH) gene as well as Anti-Müllerian hormone Receptor (AMHR 2) gene mutations have been identified in PMDS boys.Aim and methods: To report a novel mutation in the AMHR 2 gene in monochorionic d...

Pediatric severe obesity is a major threat to health and longevity. Around 7% of children worldwide have early onset severe obesity before the age of 7. Pediatric obesity is caused by an interplay of multiple factors: lifestyle, environmental, sociocultural, psychological, biological and genetic factors. Endocrine, monogenetic or syndromal causes are rare, but currently underdiagnosed and important to identify for the need of specific treatment. Cardiovascular risk factors and...

This presentation briefly gives an overview of typical gynaecological issues and fertility options of transgender adolescents.Typical gynaecological complaints and treatment options will be addressed: e.g. amenorrhea induction prior to cross-sex hormones, irregular bleeding, dysmenorrhea, vaginal discharge but also the limitations of gynaecological examination in female asssigned adolescents.National and international organizations...