ESPE Abstracts

Introduction: Central Diabetes Insipidus (CDI) is characterized by polyuria, polydipsia and weight loss, resulting from impaired secretion of Antidiuretic Hormone (ADH) in response to serum osmolarity changes. Langerhans Cell Histiocytosis (LCH)is an inflammatory myeloid neoplasm that can affect all organ systems, with central nervous system involvement frequently localized in the posterior pituitary. This report presents a case of pituitary stalk thickening d...

Children diagnosed with adrenocortical tumors (ACT) have variable prognosis depending on disease presentation at diagnosis. Available therapeutic options render excellent outcome for a subset of patients, but limited improvement in the survival of those diagnosed with non-localized/advanced disease. ACT DNA methylation was recently demonstrated to be a robust and independent prognostic biomarker. Aiming to identify potential therapeutic targets for these children, we compared ...

Background: Thyroid cancers are rare in childhood. ATA guideline (Pediatric section) has been applied in daily practice since 2015. It is very significant to accurately predict the risk in the management of differentiated thyroid cancer(DTC). For this purpose, we shared our single center-20-year-experience about the follow-up features and management of childhood and adolescent thyroid cancer. We aimed to evaluate the dynamic risk stratification (DRS) and the o...

Background: The sonic hedgehog pathway (SHH) regulates CNS development and mutations or abnormal expression of the SHH pathway genes have been identified in epithelial tumors. SHH pathway interacts with Wnt/β-catenin signalling. To date, CTNNB1/β-catenin mutations are the sole molecular abnormality found in adamantinomatous craniopharyngiomas (ACPs).Objective and Hypotheses: To analyze the expression pattern of SHH pathway genes in ACPs and its...

Background: overexpression of the oncogene Yes-associated protein 1 (YAP1), a Hippo pathway target, associates with increased cell proliferation in some human cancers. There is not data on adrenocortical tumors (ACT). YAP1 is a potential target of Wnt/β-catenin pathway, which plays an important role in ACTs.Objective and hypotheses: to evaluate the role of YAP1 and its interaction with the Wnt/β-catenin pathway in ACT.Met...

Abnormal DNA methylation contributes to tumor progression and is emerging as a prognostic marker in several types of cancers. To investigate whether DNA methylation is associated with pediatric adrenocortical tumor (pACT) presentation and patient prognosis, we analyzed the methylation profile of 57 tumors (MethylationEPIC BeadChip Array-Illumina) and patients’ clinicopathological features and outcome. The study comprehended 40 girls and 17 boys, with median age at diagnos...

Aim: To uncover a feasible tumor expression prognostic signature and potential therapeutic targets for children with pACT.Methods: Tumor RNAseq from 53 pACT children (70% girls, median age: 1.7yrs) was performed (Illumina). Using a robust, state-of-the-art, differential gene expression analysis pipeline, differentially expressed genes (DEGs: adjusted P<0.05 and |log2 fold-change|>1) were identified (DESeq2...

Background: GNAS activating mutations are the genetic basis of McCune-Albright syndrome (MAS). Peripheral precocious puberty (PPP) due to functional ovarian cysts, with or without MAS features, denotes a potential GNAS -related disorder.Aim: To explore GNAS somatic mutations (p.R201C/H) in peripheral leukocyte DNA using ddPCR in girls with ovarian-origin PPP with or without MAS.<p class="ab...

Introduction: In the last 10 years, blue light (BL) sources such as tablets and phones has increased in every age group. Especially due to the Covid-19 pandemic, screen exposure has also increased in childhood. However, the effects of BL exposure in the puberty process aren’t clear. We aimed to examine the effect of BL exposure and exposure time on pubertyMethods: Immature eighteen 21-day-old female Sprague Dawley ...

Purpose: Therapeutic goals in the adolescent male with hypogonadotropic hypogonadism(HH) are virilization, optimal adult height, normal bone mass, body composition, psychosocial development, and fertility. Until recently, only testosterone was used to treat adolescent males with HH. However, this treatment did not cover all treatment goals and adverse effects on fertility were reported. Therefore, gonadotropin therapy can be used in addition to testosterone in...