Sam Wiseman BSc, MD, FRCSC, FACSProfessor, Department of Surgery, Faculty of Medicine, University of British Columbia,Consultant Endocrine Surgeon, Head & Neck Surgeon, Surgical Oncologist, General Surgeon & Research Director, Department of Surgery, St. Paul’s Hospital, Providence Health Care,Consultant Surgical Oncologist, British Columbia Cancer Agency,Vancouver, British Columbia, CanadaChair, Endocrine Tumour Group, BC Cancer Surgery, British Columbia Cancer Agency, Director of Research, Department of Surgery, Providence Health Care, Editor, Gray’s Surgical AnatomySebastian Aspinall MD FRCSEdConsultant Endocrine and General SurgeonAssociate Clinical Lecturer, University of AberdeenAberdeen Royal Infirmary, Aberdeen, Scotland, UK