Barbara Young, BSc, Med Sci (Hons), PhD, MB, BChir, MRCP, FRCPA, Director of Anatomical Pathology, Hunter Area Pathology Service, John Hunter Hospital; Conjoint Associate Professor, University of Newcastle, Newcastle, New South Wales, Australia, Phillip Woodford, MB BS, FRCPA, Senior Staff Specialist, Anatomical Pathology and Cytopathology, Hunter Area Pathology Service, John Hunter Hospital, New Castle, New South Wales, Australia and Geraldine O'Dowd, BSc (Hons), MBChB (Hons), FRCPath, Consultant Diagnostic Pathologist, Lanarkshire NHS Board, Honorary Clinical Senior Lecturer, University of Glasgow, Glasgow, Scotland