Christos Toumpanakis is a Consultant in Gastroenterology and Neuroendocrine Tumours at the Centre for Gastroenterology and Neuroendocrine Tumour Unit—ENETS Centre of Excellence at the Royal Free Hospital, London. He is a professor at the medical school of University College London and has been awarded ‘top-teacher of the year’ several times. He graduated from the Medical School, University of Athens, in 1994, obtaining his speciality title in gastroenterology and hepatology in 2004, and achieved his PhD at the University of Athens in 2007. His sub-speciality is ‘Neuroendocrine (Carcinoid) Tumours (NETs)’ and he is considered one of the international experts in that field. He has significant clinical experience in all types of gastro-entero-pancreatic tumours, as well as bronchial NETs, and all available treatment options. His main interests, apart from general gastroenterology and endoscopy, include gastro-oesophageal reflux disease, celiac disease, chronic diarrhoea, inflammatory bowel disease and gastro-intestinal problems in patients with congenital immuno-deficiencies. He is the chair of the advisory board of the European Neuroendocrine Tumour Society (ENETS), the editor of the ENETS CME program, and the co-author of the ENETS, UK and Ireland NET Guidelines. He leads a NET clinical research group and his main research interests include novel biomarkers and molecular imaging in NETs, mesenteric fibrosis and carcinoid heart disease.