Barry AT Newell BSc(Hons) MBBS MRCP MRCPath, Consultant Histopathologist, Department of Cellular Pathology, St George's Hospital, London, UKSusan A Dilly MBBS FRCPath, Professor and Institute Director, Institute of Health Sciences Education, Barts and The London, Queen Mary's School of Medicine and Dentistry, London, UK Caroline J Finlayson MBBS FRCPath, Honorary Senior Lecturer and Consultant in Histopathology, St George's Hospital Medical School, London, UKMitesh Gandhi MBBS MRCP(UK) FRCR(UK) FRANZCR, Radiologist, The Princess Alexandra Hospital and Queensland X-Ray, Brisbane, AustraliaSunil R Lakhani, BSc(Hons) MBBS MD FRCPath FRCPA, Professor and Head, Molecular and Cellular Pathology, School of Medicine, University of Queensland, Mayne Medical School, Brisbane, Australia