hrp0097p1-550 | Pituitary, Neuroendocrinology and Puberty | ESPE2023

The endocrine phenotype of SWI/SNF-associated Coffin-Siris syndrome includes pituitary endocrinopathies, pituitary hypoplasia, and septo-optic dysplasia

M McGlacken-Byrne1 Sinead , Wakeling Emma , Gaston-Massuet Carles , Peters Catherine , Dattani Mehul

Introduction: Coffin-Siris Syndrome (CSS) is a rare multisystem genetic disorder which arises from genetic abnormalities within genes encoding for the SWI/SNF complex (ARID1A, ARID1B, DPF2, SMARCA4, SMARCB1, SMARCA2, SMARCE1). Endocrinopathies have been associated with CSS, including idiopathic short stature, hyperinsulinism, obesity, growth hormone deficiency, and cryptorchidism. Here, we describe the endocrine features of a series of children with S...

hrp0094p1-50 | Sex Endocrinology and Gonads A | ESPE2021

Pathogenic variants in the human m6A reader YTHDC2 are associated with primary ovarian insufficiency

McGlacken-Byrne Sinead M , Torres Ignacio Del Valle , Stabej Polona Le Quesne , Belutti Laura , Ocaka Louise , Ishida Miho , Suntharalingham Jenifer P , Genomics UCL , Discovery GOSgene , Resource Human Developmental Biology , Dattani Mehul T , Kelberman Dan , Lagos Carlos F , Livera Gabriel , Conway Gerard S , Achermann John C ,

Background: Primary ovarian insufficiency (POI) is genetically mediated in up to 30% of cases. Many genes associated with POI have roles in early ovary developmental processes, including meiosis.Objectives: We investigated the genetic mechanism underlying early-onset POI in three young women presenting with absent puberty: two sisters from a consanguineous pedigree and a third unrelated proband.<st...

hrp0089p3-p356 | Sex Differentiation, Gonads and Gynaecology or Sex Endocrinology P3 | ESPE2018

Paediatric Doctors’ Experience and Knowledge of the Initial Management of Neonatal Ambiguous Genitalia

McGlacken-Byrne Sinead , Byrne Kathryn , O'Rahelly Mark , Ryan Ethel

Introduction: Neonatal ambiguous genitalia can herald sensitive, time-critical, and life-threatening diagnoses and thus paediatric doctors must be competent in their management. However, ambiguous genitalia are rare, limiting clinical exposure. We assessed paediatric doctorsÂ’ experience of, knowledge of, and confidence in managing this condition.Methods: A questionnaire was circulated to paediatric doctors at two tertiary and four secondary level pa...

hrp0097p1-307 | Growth and Syndromes | ESPE2023

A unique combination of Klinefelter syndrome and Three M Syndrome in a boy with short stature

Lee Mi-Seon , Lee Rosie , Lee Sang-Eun , Kwak Na-eun , Kwon Soon-Hak , Moon Jung-Eun

Introduction: Klinefelter syndrome (KS) is most common sex chromosomal aneuploidy in males. The typical clinical features are tall stature with long extremities, small testis, and learning disabilities. Three M syndrome is an extremely rare genetic disorder characterized by short stature, craniofacial abnormality and skeletal malformations. We report a unique case of short stature in KS due to three M syndrome.Case: A 9-...

hrp0095p1-143 | Pituitary, Neuroendocrinology and Puberty | ESPE2022

Use of the 100,000 Genomes Project to identify the molecular basis of rare endocrine disorders within a tertiary paediatric endocrinology centre

M McGlacken-Byrne Sinead , Gregory Louise , Roberts Rowenna , Wakeling Emma , Katugampola Harshini , T Dattani Mehul

Introduction: The UK 100,000 Genomes Project (100KGP) recently investigated the genetic basis of rare disease using whole genome sequencing. The genetic aetiology of most rare paediatric endocrine disease remains unexplained.Methods: Children with genetically unexplained rare endocrine disease attending a subspecialist paediatric endocrinology clinic underwent whole genome sequencing as part of the 100KGP. Parental DNA w...

hrp0094p1-27 | Diabetes A | ESPE2021

The SARS-CoV-2 Pandemic Is Associated With Increased Severity Of Presentation Of Childhood Onset Type 1 Diabetes Mellitus: A Multicentre Study Of The First COVID-19 Wave

McGlacken-Byrne Sinead M , Drew Samantha EV , Turner Kelly , Peters Catherine , Amin Rakesh ,

Objective: Children are usually mildly affected by Severe Acute Respiratory Syndrome Coronavirus 2 infection (SARS-CoV-2, COVID-19). However, the pandemic has impacted negatively on children with non-COVID-19 diseases. We aimed to determine the impact of the COVID-19 pandemic on the presentation of newly diagnosed childhood-onset type 1 diabetes.Methods: This was a cross-sectional study conducted over a one-year period. ...

hrp0094p2-8 | Adrenals and HPA Axis | ESPE2021

High-dose steroids in the management of Paediatric Multisystem Inflammatory Syndrome Temporally associated with SARS-CoV-2 (PIMS-TS): Considering the hypothalamic-pituitary-adrenal axis

McGlacken-Byrne Sinead M , Johnson Mae , du Pre Pascale , Katugampola Harshini ,

Background: Steroid therapy has been used as a therapeutic strategy in the management of Paediatric Multisystem Inflammatory Syndrome Temporally associated with SARS-CoV-2 (PIMS-TS) with good effect. However, as always, exogenous steroid administration carries with it a risk of iatrogenic adrenal insufficiency.Aim: We characterise steroid therapy use in PIMS-TS and consider implications for hypothalamic-pituitary-adrenal...

hrp0094p2-442 | Sex differentiation, gonads and gynaecology or sex endocrinology | ESPE2021

Persistent Müllerian duct syndrome presenting with bilateral cryptorchidism and obstructed inguinal hernia

Vlachopapadopoulou Elpis-Athina , Fotiadou Anatoli , Picard Jean-Yves , Achilleos Orthodoxos , Lamprinou Zoe , Tzortzopoulou Adelais , Passalidis Alexandros , Michalacos Stephanos

Background: Persistent Müllerian duct syndrome (PMDS) is a Disorder of Sex Development (DSD) caused by mutations in genes encoding anti-Müllerian hormone (AMH) or its type II receptor (AMHR2) with autosomal recessive transmission. Objective: To report a case of transverse testicular ectopia (TTE), associated with PMDS, initially presented as an obstructed inguinal hernia.Case presentation: An 18- days- old male infant, wi...

hrp0084p3-744 | Diabetes | ESPE2015

Transition During Adolescence, is there Room to Improve?

Glackin Sinead , Molloy Sinead , Neylon Orla

Background: Transition is a difficult period for adolescents with type 1 diabetes. The non-linear development of the adolescent brain along with increasing insulin resistance, increasing autonomy and risk of psychopathology means that adolescents are vulnerable to poor mental and physical health and ensuing deterioration in metabolic control. It is also during this period of turmoil that adolescents often transfer from paediatric to adult services.Object...

hrp0097t13 | Section | ESPE2023

Single-nuclei RNA sequencing reveals potential mechanisms of ovarian insufficiency in 45,X Turner Syndrome

M McGlacken-Byrne Sinead , Del Valle Ignacio , Xenakis Theodoros , Nel Lydia , Liptrot Danielle , Solanky Nita , C Conway Gerard

Background: Turner syndrome (TS) arises from a complete or partial loss of one X chromosome (45,X) and is the most common genetic cause of primary ovarian insufficiency (POI) in women. Surprisingly little is understood about the pathogenesis of POI in TS beyond an acknowledged germ cell loss throughout the second trimester. Although X chromosome haploinsufficiency likely contributes, the variability in reproductive phenotype in 45,X TS suggests it is not the o...