Dr Jason Dunn is a Consultant Gastroenterologist based in London specialising in therapeutic endoscopy, including HALO RFA for Barrett's oesophagus.

He is the Clinical Lead for Endoscopy at Guy’s and St Thomas’ Hospitals, where he was appointed as a consultant in 2012. He has private practice priviliges at London Bridge Hospital as well.

Dr Dunn has a special interest in Barrett’s oesophagus, early Upper GI cancer and oesophageal endoscopic therapy. He is highly proficient in Endoscopic Mucosal Resection (EMR) and Radiofrequency Ablation (RFA) techniques and set up a regional Endotherapy centre at St Thomas for South East region including Kent, Surrey and Sussex. He has written guidelines for the management of Barrett’s oesophagus for London and Kent.

He was awarded a CRUK clinical fellowship at UCL and studied use of optical diagnostics and minimally invasive therapies for the treatment of Barrett’s oesophagus. He gained his PhD in 2011 and has presented his work at national and international meetings. His work on treatment of Barrett’s oesophagus with RFA, and the use of biomarkers to predict cancer progression, has won prizes. He has published in high impact factor journals and book chapters. He currently holds Honorary Senior Lecturer posts at Kings College London and Oslo University in the Institute of Medical Informatics.

Dr Dunn also has an interest in Nutrition, specialising in parenteral nutrition in oncology/palliative care and PEG tube insertion. 

Dr Dunn is the research lead for the Oesophageal Section of the British Society of Gastroenterology. He is an advisor to NICE and medical advisor to Action against Heartburn, a patient support charity. 

Diseases, Medical Tests and Treatments

HALO Radiofrequency Ablation

• Gastroenterologist; Bowel disease including inflammatory (IBD); Crohn’s Disease; ulcerative colitis; high-quality colonoscopy; Colon polyps; Lynch Syndrome; diarrhoea; abdominal pain; indigestion; dyspepsia; constipation; irritable bowel syndrome (IBS); Reflux; Barrett’s Oesophagus; HALO Radiofrequency Ablation; Endoscopic mucosal resection; Inlet patch; globus; Eosinophilic Oesophagitis; Trans Nasal Endoscopy; general gastroenterology; nutrition