Gastroenterology and Hepatology: Overview of new developments from St Marks Hospital

Dr. Zacharias Tsiamoulos

St Mark's Hospital

Dr. Zacharias P. Tsiamoulos currently holds the post of the Senior Clinical Researcher working under the supervision and in tandem with Professor Brian P. Saunders, at Wolfson Unit for Endoscopy at St Mark’s Hospital and Academic Institute. His basic PhD thesis (in molecular mimicry in IBD) and clinical MD (Res) ongoing research in Luminal Gastroenterology (endoscopic excision of complex colorectal polyps: improving outcomes, new endoscopic instruments and techniques) at Imperial College, London have led to a recent appointment (since November 2015) as a Consultant in Gastroenterology/Specialist in Gastrointestinal Endoscopy at East Kent University Hospital Foundation NHS Trust.  


Ashley Barnabas

St Mark's Hospital


Ashley Barnabas attended the University of Natal in Durban, South Africa. He trained as a gastroenterologist in south London before further specialist training in liver disease in Oxford and at King's College Hospital. He then worked as a senior clinical research fellow and locum consultant at King's. During this time he was involved in phase 2 and 3 clinical trials of all of the  hepatitis C drugs currently in use today. He helped develop a value based model to understand the patient perspective of viral hepatitis treatment. He currently works as a consultant hepatolgist at St Mark's , where he is the clinical lead for the hepatitis C treatment programme



Dr Naila Arebi

St Mark's Hospital


Dr Naila Arebi graduated as a Doctor of Medicine from the University of Malta. She pursued her post-graduate training in Oxford and London leading to accreditation in Gastroenterology. Following her appointment as a consultant Gastroenterologist at St Mark's Hospital and an honorary senior lecturer at Imperial College in 2005, she became a Fellow of the Royal College Physicians in 2010. Her clinical work involved most aspects of gastroenterology with key interest areas Inflammatory Bowel Disease, Irritable Bowel Syndrome and constipation. She currently holds the chair of Gastroenterology for St Mark’s and through the award of NIHR grant. Her current research is focused on Inflammatory Bowel Disease, where she is the chief investigator on a number of research studies aimed at enhancing our understanding Inflammatory bowel disease, testing new treatments and improving the delivery care for patients through national and international collaborations with Chicago, New York and Denmark. She is a reviewer for a number of international journals and grant funding bodies and an author on several peer-reviewed publications. On a national level she sits on the British Society of Gastroenterology adolescents and young adults committee as elected committee member.


Dr. Ravi Misra

St. Mark’s Hospital, Harrow, London


Ravi is a senior gastroenterology trainee at St. Marks Hospital currently in the second year of his PhD. Ravi’s particular interest is the impact of ethnicity on the incidence, phenotype and microbiome in inflammatory bowel disease.


Dr. Maxton Pitcher

St. Mark’s Hospital, Harrow, London


Dr Pitcher is a Consultant Gastroenterologist. Max was appointed to the staff at St Mark's and Northwick Park in 1998 from Oxford, where he was Senior Registrar. He graduated in Medical Sciences from the University of Cambridge in 1985 and qualified in 1988 from the University of Oxford. His research on sulphate-reducing bacteria, sulphur metabolism and ulcerative colitis at The MRC Dunn Clinical Nutrition Centre won him a University prize for his MD Thesis in Cambridge in 1996. Max continues to have a clinical research interest in gut flora and inflammatory bowel disease and is a medical advisor to NACC. As well as running a specialist IBD clinic, Max sees general Gastroenterology outpatient referrals and patients with GI cancer. The latter are managed in close collaboration with specialist surgical colleagues as part of the West London Cancer Network. With Dr. Meron Jacyna, he manages the majority of the acute Gastroenterology inpatient workload admitted to Northwick Park Hospital, as well as the therapeutic ERCP service. His "extralumenal" interests include golf, SCUBA diving and playing the violin in chamber ensembles and orchestras including the European Doctors Orchestra.