Davidson's e Self-assessment in Medicine Edited by Deborah Wake CD MB ChB (Hans), BSc, PhD, Diploma Clin Ed, MRCPE Clinical Reader, University of Edinburgh; Honorary Consultant Physician, NHS Lothian, Edinburgh, UK Patricia Cantley MB ChB, FRCP, BSc Hans (Med Sci) Consultant Physician, Midlothian Enhanced Rapid Response and Intervention Team, Midlothian Health and Social Care Partnership and also Royal Infirmary of Edinburgh and Midlothian Community Hospital, Edinburgh, UK II ::s CD Edinburgh London New York Oxford Philadelphia ELSEVIER St Louis Sydney 2018 ELSEVIER © 2018, Elsevier Limited All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. Details on how to seek permission, further information about the Publisher's permissions policies and our arrangements with organizations such as the Copyright Clearance Center and the Copyright Licensing Agency, can be found at our website: www.elsevier.com/ permissions. This book and the individual contributions contained in it are protected under copyright by the Publisher (other than as may be noted herein). Notices Practitioners and researchers must always rely on their own experience and knowledge in evaluating and using any information, methods, compounds or experiments described herein. Because of rapid advances in the medical sciences, in particular, independent verification of diagnoses and drug dosages should be made. To the fullest extent of the law, no responsibility is assumed by Elsevier, authors, editors or contributors for any injury and/or damage to persons or property as a matter of products liability, negligence or otherwise, or from any use or operation of any methods, products, instructions, or ideas contained in the material herein. ISBN: 978-0-7020-7151-5 International ISBN: 978-0-7020-7145-4 Working together !J~ to grow libraries in Book Aid developing countries International www.elsevter.com • www.bookaid.org Printed in Poland Last digit is the print number: 9 8 7 6 5 4 3 2 I Executive Content Strategist: Laurence Hunter Cont~nt Development Specialist: Carole McMurray Project Manager: Louisa Talbott Design: Miles Hitchen Illustration Manager: Nichole Beard Illustrator: MPS North America LLC Marketing Manager: Deborah Watkins Contents Preface vii Introduction ix Contributors xi Abbreviations XV 1. Clinical decision-making 1 2. Clinical therapeutics and good prescribing 6 3. Clinical genetics 14 4. Clinical immunology 22 5. Population health and epidemiology 28 6. Principles of infectious disease 32 7. Poisoning 37 8. Envenomation 46 9. Environmental medicine 151 10. Acute medicine and critical illness 54 11. Infectious disease 73 12. HIV infection and AIDS 96 13. Sexually transmitted infections 103 14. Clinical biochemistry and metabolic medicine 107 15. Nephrology and urology 115 16. Cardiology 132 17. Respiratory medicine 154 18. Endocrinology 185 19. Nutritional factors in disease 203 20. Diabetes mellit.us 212 21. Gastroenterology 225 / Preface This is the first edition of Davidson's Self-assessment in Medicine, designed as an accompanying volume to the internationally renowned textbook Davidson's Principles and Practice of Medicine. Since the original Davidson's was first published in 1952, it has acquired a large following of medical students, doctors and health professionals. Alongside the success of the main textbook, a demand has emerged for a complementary self-assessment book covering a broad range of general medicine topics. Our new book uses typical clinical scenarios to test the reader. Each chapter is written by a specialty expert and the contents follow the style and chapter layout of Davidson's. This book can be used either independently or in conjunction with the main book. This book has been built around modern educational principles and utilises a contemporary assess ment style, in line with current undergraduate and postgraduate teaching. It is designed to help and support students in their final undergraduate years and in the early years after qualification. The style is compatible with that used in modern postgraduate examinations across the world. The clinical scenarios have been chosen to be suitable for clinicians at any stage in their career, supporting ongoing professional development. Clinical reasoning and judgement are encouraged, with questions mirroring the situations and presentations that clinicians will meet in their everyday practice. The content is applicable to a global audience and is based on current evidence-based best practice. The modern physician needs not only a sound knowledge base but also the ability to apply that understanding appropriately to individual patients. The vision of the editors is to create a resource that stimulates readers to build and apply their clinical knowledge to real-life scenarios, resulting in excellent patient -centred care. 1 Deborah Wake and Patricia Cantley Edinburgh, 2018 Introduction This book offers a broad education through formative self-assessment in general internal medicine. The majority of the questions have been designed around clinical scenarios, with a number of optional answers offered to the question posed. In general, the 'best fit' answer is sought unless otherwise stated. Full explanations are given as appropriate to assist the reader in their learning. The questions aim to cover a wide range of topics, divided into specialist chapters in line with Davidson's Principles and Practice of Medicine. The questions have in general been based on UK clinical practice and pharmacology, but where appropriate generic drug names are used and the underlying principles are applicable internationally. Whilst the answers given are in line with best evidence based clinical practice, patient choice and cultural factors should always be considered when applying the learning in individual patients and situations. How to use this book This self-assessment book can be used either independently or in conjunction with Davidson's.! Readers may find it useful to read the relevant section of the main textbook in advance of tacklin~ the self-assessment; or they can use it subsequently to explore the topic in greater detail. The questions, followed by their corresponding answers, have been arranged in the same chapter order as Davidson's. The chapters are free-standing and can be read independently in any order. Some of the questions are based on accompanying clinical images and radiology. Where it is appropriate to see the image in colour, it has also been reproduced in a colour photographic SE;ction at the back of the book. Normal Reference Ranges for tests have not been used within the questions or explanations, but can be found in the laboratory reference range chapter, at the end of the book. Standard abbreviations are found within the text and are generally explained at first use. A full list of abbreviations can be found at the front of the book. r i Contributors Anna Anderson MBChB, MRCP, PhD Harry Campbell MD, FRCPE, FFPH, FRSE Specialist Registrar Diabetes and Endocrinology, Professor of Genetic Epidemiology and Public Western General Hospital, Edinburgh, UK Health, Centre for Global Health Research, Usher Institute of Population Health Sciences Brian J Angus BSc (Hons), DTM&H, FRCP, and Informatics, University of Edinburgh, MD, FFTM(Gias) Edinburgh, UK Associate Professor, Nuffield Department of Medicine, University of Oxford, UK C Fiona Clegg BSc (MedSci), MBChB, MRCP (UK) Quentin M Anstee BSc (Hons), MBBS, PhD, Clinical Lecturer in Gastroenterology, School of MRCP, FRCP Medicine, Medical Sciences and Nutrition, Professor of Experimental Hepatology, Institute University of Aberdeen, Aberdeen, UK of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK; Honorary Consultant Gavin Clunie BSc, MBBS, MD, FRCP Hepatologist, Freeman Hospital, Newcastle upon Consultant Rheumatologist and Metabolic Bone I 1 Tyne NHS Hospitals Foundation Trust, Newcastle Physician, Cambridge University Hospitals NHS upon T yne, UK Foundation Trust, Addenbrooke's Hospital, Cambridge, UK Jennifer Bain MBChB, MRCP, FRCA, FFICM Fellow in Vascular Anaesthesia, Scottish Lesley A Colvin MBChB, BSc, FRCA, PhD, Thoraco-abdorninal & Aortic Aneurysm Service, FRCP (Edin), FFPMRCA Royal Infirmary of Edinburgh, Edinburgh, UK ConsultanVHonorary Professor in Anaesthesia and Pain Medicine, Department of Anaesthesia, Leslie Burnett MBBS, PhD, FRCPA . Critical Care and Pain Medicine, University Chief Medical Officer, Genome.One, of Edinburgh, Western General Hospital, Garvan Institute of Medical Research, Edinburgh, UK Darlinghurst, Sydney; Honorary Professor, University of Sydney, Sydney Medical School, Bryan Conway MB, MRCP, PhD Sydney; Conjoint Professor, UNSW, St Senior Lecturer, Centre for Cardiovascular Vincent's Medical School, Darlinghurst, Science, University of Edinburgh; Honorary Sydney, Australia Consultant Nephrologist, Royal Infirmary Edinburgh, Edinburgh, UK Mark Byers OBE, FRCGP, FFSEM, FIMC, MRCEM Nicola Cooper MBChB, FAcadMEd, FRCPE, Consultant in Pre-Hospital Emergeney Medicine, FRACP Institute of Pre-Hospital Care, London, UK Consultant Physician, Derby Teaching Hospitals NHS Foundation Trust; Honorary Clinical Associate Professor, Nottingham University, Division of Medical Sciences and Graduate Entry Medicine, Nottingham, UK ---, xii • CONTRIBUTORS I i i Dominic J Culligan BSc, MBBS, MD, FRCP, Sally H Ibbotson BSc (Hons), MBChB (Hons), FRCPath MD, FRCP (Edin) Consultant Haematologist and Honorary Professor of Photodermatology, Photobiology Senior Lecturer, Aberdeen Royal Infirmary, Unit, Dermatology Department, University of Aberdeen, UK Dundee, Dundee, UK Ruth Darbyshire MB BChir, MA(Cantab) Sara J Jenks Bsc (Hons), MRCP, FRCPath Specialty Trainee in Ophthalmology, Yorkshire Consultant in Metabolic Medicine, Department of and Humber Deanery, Yorkshire, UK Clinical Biochemistry, Royal Infirmary of Edinburgh, UK Graham Dark MBBS, FRCP, FHEA Senior Lecturer in Medical Oncology and Cancer Sarah Louise Johnston MB ChB, FCRP, Education, Newcastle University, Newcastle upon FRCPath Tyne, UK Consultant in Immunology & HIV Medicine, Department of Immunology and Immunogenetics, Richard J Davenport DM, FRCP (Edin), North Bristol NHS Trust, Bristol, UK BM BS, BMedSci Consultant Neurologist and Honorary Senior David E J Jones MA, BM BCh, PhD, FRCP Lecturer, University of Edinburgh, Edinburgh, UK Professor of Uver Immunology, Institute of Cellular Medicine, Newcastle University; Consultant David Dockrell MD, FRCPI, FRCP (Gias), Hepatologist, Freeman Hospital, Newcastle upon FACP Tyne, UK Professor of Infection Medicine, MAC/University of Edinburgh Centre for Inflammation Research, Peter Langhorne MBChB, PhD, FRCP (Gias), University of Edinburgh, Edinburgh, UK Hon FRCPI Professor of Stroke Care, Institute of Emad EI-Omar BSc (Hons), MBChB, Cardiovascular and Medical Sciences, University MD (Hons), FRCP (Edin), FRSE of Glasgow, Glasgow, UK Professor of Medicine, St George and Sutherland Clinical School, University of New South Wales, Stephen Lawrie MD (Hons), FRCPsych, Sydney, Australia Hon FRCP (Edin) Professor of Psychiatry, University of Edinburgh, Sarah Fadden BA, MB BChir, FRCA Edinburgh, UK Senior Registrar in Anaesthesia, Royal Infirmary of Edinburgh, Edinburgh, UK John Paul Leach MD, FRCP Consultant Neurologist, Institute of Neurological Catriona M Farrell MBChB, MRCP (UK) Sciences, Glasgow; Head of Undergraduate Specialist Registrar Endocrinology and Diabetes, Medicine, University of Glasgow, Glasgow, UK Ninewells Hospital, Dundee, UK Andrew Leitch MBChB, BSc (Hons), PhD, Amy Frost MA (Cantab), MBBS, MRCP MSc (Ciin Ed), FRCPE (Respiratory) Clinical Genomics Educator, Affiliated to St Consultant Respiratory Physician, Western George's University NHS Foundation Trust, General Hospital; Honorary Senior Lecturer, London, UK University of Edinburgh, Edinburgh, UK Neil Grubb MD, FRCP Gary Maartens MBChB, FCP(SA), MMed Cardiology Consultant, Royal Infirmary of Professor of Medicine, University of Cape Town, Edinburgh; Honorary Senior Lecturer, Cape Town, South Africa Cardiovascular Sciences, University of Edinburgh, Edinburgh, UK Lucy Mackillop BM BCh, MA (Oxon), FRCP Consultant Obstetric Physician, Oxford University Jyoti Hansi Hospitals NHS Found01tion Trust; Honorary Senior Department of Gastroenterology, Royal Infirmary Clinical Lecturer, Nuffield Departmentof of Edinburgh, Edinburgh, UK Obstetrics and Gynaecology, University of Oxford, Oxford, UK l