Neuroendocrine Tumour (NET) Team

The neuroendocrine tumour (NET) unit at the Royal Free Hospital – Private Patients Unit is made up of a highly qualified team of consultant general surgeons, gastroenterologists and oncologists based at the Royal Free London NHS Foundation Trust. They are all recognised experts in their various fields and work together within the trust, both for NHS and private patients. Each consultant sub-specialises in a different area of Neuroendocrine Tumours, allowing our clinic to offer comprehensive treatment.

The consultants’ individual and combined expertise offers a very comprehensive insight into this particular speciality. Our team works together to deal with even the most complex conditions.

Professor Martyn Caplin

Consultant Gastroenterology And Hepatobiliary Medicine – BSC (HONS) DM FRCP

Special interests:

Gastroenterology, therapeutic endoscopy, peptic ulcer disease, g.i. tumour screening and neuroendocrine tumours.


Dr Christos Toumpanakis

Consultant In Gastroenterology & Neuroendocrine Tumours – MD PHD FRCP AGAF

Special interests:

General gastroenterology, Chronic diarrhoea, Inflammatory bowel disease, Neuroendocrine (carcinoid) tumours, Gastro-oesophageal reflux disease and Gastroinstestinal problems of patients with congenital immunodeficiency.


Professor Tim Meyer

Consultant Medical Oncologist – BSC FRCP PHD

Special interests:

Medical oncology, gastrointestinal cancer, hepatobiliary cancer and neuroendocrine tumours.


Professor Brian R Davidson

Consultant HPB Surgeon – MBCHB MD FRCS

Special interests:

Liver surgery, biliary surgery, pancreatic surgery, liver transplant and

laparoscopic cholecystectomy.


Mr Giuseppe Fusai

Consultant Surgeon – MS FRCS

Special interests:

HPB and liver transplant surgery.


Mr Charles Imber

Consultant Surgeon – MD FRCS MB. BCHIR. BSC. HONS.

Special interests:

Colorectal liver metastases, cholangiocarcinoma, pancreatic cancer, hydatid disease of liver, complex abdominal wall hernias, groin pain and inguinal hernias, gall bladder disease, liver transplantation and general surgery emergencies.


Mr Sakhawat (Zak) Rahman

Consultant Pancreatic, Upper Gi / Bariatric And Advanced Laparoscopic Surgeon – MBCHB FRCS(GENSURG) MD

Special interests:

Pancreatitis and Laparoscopic Surgery for Pancreatic Tumours, gastric banding, gastric bypass, reflux disease, pancreatic cancer, gastric cancer, achalasia, gallstones, key-hole surgery, surgery for diabetes, gallstones and cholangiocarcinoma.


Mr Gunju Ogunbiyi

Consultant General Surgeon – MBBS, MD, FRCS

Special interests:

Colorectal, gastroscopy OGD, colonoscopy, flexible sigmoidoscopy, gastrointestinal cancers and lower gastointestinal cancers.


Dr Daniel Krell

Consultant Medical Oncologist – DPHIL, MRCP, MBCHB, BSC

Special interests:

Management of patients with gastro-oesophageal, colorectal, pancreatic, liver and biliary tract cancers using chemotherapy, targeted therapy and immunotherapies.


Dr Joseph I Davar

Consultant Cardiologist – MD, PHD, FRCP, FACC

Special interests:

Non-invasive diagnosis and management of different cardiac pathologies including coronary artery disease, valvular heart disease, carcinoid heart disease, heart failure, hypertension, cardiomyopathies and chemotherapy induced cardiomyopathies.