Edited by John C Watkinson MSc (Nuclear Medicine; London). MS (London). FRCS (General Surgery). FRCS(ENT). DLO. One-Time Honorary Senior Lecturer and Consultant ENT/Head and Neck and Thyroid Surgeon. Queen Elizabeth Hospital, University of Birmingham NHS Trust and the Royal Marsden and Brompton Hospitals, Fulham Road, Chelsea, London, UK. Currently Honorary Consultant ENT/Head and Neck and Thyroid Surgeon. Great Ormond Street Hospital (GOSH) and St Georges Hospital NHS Trust, Tooting, London. Honorary Senior Anatomy Demonstrator, University College London (UCL). Business Director, Endocrine MDT. The Bupa Cromwell Hospital, Kensington, London. Raymond W Clarke BA, BSc, DCH, FRCS, FRCS(ORL) Consultant Paediatric Otolaryngologist, Royal Liverpool Children’s Hospital, Liverpool UK, Senior Lecturer and Associate Dean, University of Liverpool, UK Section Editors Vindh Peleri .Terry M Jones.Timothy Woolfard. Nicholas White