hrp0098p3-244 | Sex Differentiation, Gonads and Gynaecology, and Sex Endocrinology | ESPE2024

A rare cause of Secondary Amenorrhoea: Sertoli-Leydig cell tumour of ovary associated with DICER-1

Gunasekara Buddhi , McGlacken- Bryne Sinead , MacDonald Nicola , Soto Carmen , El-Khairi Ranna

Background: Secondary amenorrhoea occurs in approximately 8% of adolescent females. Ovarian and adrenal tumours are rare causes of secondary amenorrhoea. Ovarian Sertoli-Leydig cell tumours (SLCT) are rare sex-cord stromal tumours of the ovary, accounting for <0.5% of all primary ovarian neoplasms. SLCTs affect all age groups, 75% detected in second and third decade of life (mean age 25 years) and <10% detected following menopause. Testicular-like tumour...

hrp0089rfc7.2 | Fetal, Neonatal Endocrinology and Metabolism | ESPE2018

Outcomes of a Quality Improvement Project Integrating Continuous Glucose Monitoring Systems into the Routine Management of Neonatal Hypoglycaemia

McGlacken-Byrne Sinead , Jenkinson Allan , O'Neill Roisin , Murphy John

Introduction: Empirical research studies suggest that continuous glucose monitoring systems (CGMS) are safe and could optimize neonatal hypoglycaemia management. However, they need to be tested within resource-limited, time-constrained clinical practice. CGMS was piloted in our Level 3 Neonatal Intensive Care Unit (NICU) in June 2017. Five key barriers to its effective implementation were identified: i) Lack of NICU staff confidence in device usage ii) Infant discomfort during...

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...

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...

hrp0098fc10.2 | Multisystem Endocrine Disorders | ESPE2024

Characterising the natural history of Multiple Endocrine Neoplasia 2B caused by M918T RET pathogenic variants in children and young people

McGlacken-Byrne Sinead , Butler Colin , Abdel Aziz Tarek , Izatt Louise , Brain Caroline , Kurzawinski Tom

Aim: We describe the natural history, treatment, and clinical outcomes of Multiple Endocrine Neoplasia type 2B (MEN2B) caused by the M918T RET pathogenic variant.Methods: Retrospective case notes review of all young people <18 years presenting to a quaternary paediatric endocrinology referral centre in the UK between 2005-2023 who have MEN2B caused by the M918T pathogenic variant in the RET proto-onc...

hrp0098rfc12.4 | Thyroid | ESPE2024

Establishing Outcomes and Management of Mild Neonatal Hyperthyrotropinaemia, a Retrospective Multi-Centre Review

Howard-James Naomi , McGlacken-Byrne Sinead , Brady Jennifer , Hayes Breda , Twomey Anne , Carolan Eirin , Murphy NP

Background: Hyperthyrotropinaemia (HTT) describes the biochemical condition of elevated thyroid stimulating hormone (TSH) with normal thyroid hormone concentration. The aetiology of this condition is likely multifactorial but factors such as maternal thyroid disease and presence of trisomy 21 (T21) are thought to play an important role. HTT can be identified during newborn screening for congenital hypothyroidism (CHT), or when thyroid investigations are perfor...

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...

hrp0095p1-371 | Sex Differentiation, Gonads and Gynaecology, and Sex Endocrinology | ESPE2022

Exome sequencing reveals a high proportion of causal and candidate gene variants in a large early-onset Primary Ovarian Insufficiency cohort

M McGlacken-Byrne Sinead , P Suntharalingham Jenifer , Ishida Miho , Buonocore Federica , Del Valle Ignacio , Cameron-Pimblett Antoinette , Genomics UCL , T Dattani Mehul , S Conway Gerard , C Achermann John

Background: The presentation of early-onset Primary Ovarian Insufficiency (EO-POI), most often with primary amenorrhea, is at one end of a spectrum spanning 40 years. The aetiology of POI is frequently unclear but next generation sequencing of varied age groups has identified several associated genetic variants. Whether girls with EO-POI are more likely to have a genetic aetiology than those with later presentations remains unknown.<stro...