M Alam1, R Wiles2, P Rooney3, S Ahmed3. 1. ST2 General Surgery, Department of Colorectal Surgery, Royal Liverpool and Broadgreen University Hospitals NHS Trust, Liverpool, UK. 2. Consultant Gastro-Intestinal Radiologist, Department of Radiology, Royal Liverpool and Broadgreen University Hospitals NHS Trust, Liverpool, UK. 3. Consultant Colorectal Surgeon, Department of Colorectal Surgery, Royal Liverpool and Broadgreen University Hospitals NHS Trust, Liverpool, UK.