Dr. Hoong-Wei Gan is a Clinical Research Fellow working at University College London Great Ormond Street Institute of Child Health. He has a special interest in the long-term neuroendocrine late effects of childhood cancer, particularly in improving the care and quality of life of brain tumour survivors. He has recently completed his PhD thesis on the pathophysiology of appetite-regulating hormones in hypothalamic obesity, whilst his MSc work on 30-year neuroendocrine outcomes in patients with paediatric optic pathway gliomas remains the largest longitudinal analysis of risk factors in this cohort to date. He is the Deputy Chair of the United Kingdom Paediatric Craniopharyngioma Guideline Development Group (commissioned by the UK Children’s Cancer and Leukaemia Group (CCLG), Royal College of Paediatrics and Child Health (RCPCH), and the British Society of Paediatric Endocrinology & Diabetes (BSPED)), paediatric endocrinology representative on the European SIOP-LGG 201X Trial Development Group, and is a working group member of the European Registries for Rare Endocrine Conditions (EuRRECa) Rare Pituitary Disorder subgroup. He has recently completed his training in paediatric endocrinology at Great Ormond Street Hospital for Children, The Royal London Children’s Hospital, Nottingham Children’s Hospital and University College London Hospital and is also a committee member of the SUCCESS Charity, a charity dedicated to improving the quality of life of brain tumour survivors.