Series Editor
David M. Yousem, MD, MBA
Professor of Radiology
Director of Neuroradiology
Russell H. Morgan Department of Radiology
and Radiological Science
The Johns Hopkins Medical Institutions
Baltimore, Maryland
Other Volumes in the CASE REVIEW Series
Brain Imaging, Second Edition
Breast Imaging
Cardiac Imaging
Duke Review of MRI Principles
Emergency Radiology
General and Vascular Ultrasound, Second Edition
Genitourinary Imaging, Second Edition
Musculoskeletal Imaging, Second Edition
Nuclear Medicine, Second Edition
Obstetric and Gynecologic Ultrasound, Second Edition
Pediatric Imaging, Second Edition
Spine Imaging, Second Edition
Thoracic Imaging, Second Edition
Vascular and Interventional Imaging
CASE REVIEW
Gastrointestinal Imaging
THIRD EDITION
EDITOR
Vincent H.S. Low, MBBS, FRANZCR
Associate Professor
Department of Medicine and Pharmacology
University of Western Australia
Crawley, Western Australia
Consultant Radiologist
InSight Clinical Imaging
Joondalup, Western Australia
1600 John F. Kennedy Blvd.
Ste 1800
Philadelphia, PA 19103-2899
GASTROINTESTINAL IMAGING: CASE REVIEW, THIRD EDITION
Copyright 2012 by Saunders, an imprint of Elsevier Inc.
Copyright 2008, 2000 by Mosby, Inc., an affiliate of Elsevier Inc.
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This book and the individual contributions contained in it are protected under copyright by the Publisher (other than as may be noted herein).
Notices
Knowledge and best practice in this field are constantly changing. As new research and experience broaden our understanding, changes in research methods, professional practices, or medical treatment may become necessary.
Practitioners and researchers must always rely on their own experience and knowledge in evaluating and using any information, methods, compounds, or experiments described herein. In using such information or methods they should be mindful of their own safety and the safety of others, including parties for whom they have a professional responsibility.
With respect to any drug or pharmaceutical products identified, readers are advised to check the most current information provided (i) on procedures featured or (ii) by the manufacturer of each product to be administered, to verify the recommended dose or formula, the method and duration of administration, and contraindications. It is the responsibility of practitioners, relying on their own experience and knowledge of their patients, to make diagnoses, to determine dosages and the best treatment for each individual patient, and to take all appropriate safety precautions.
To the fullest extent of the law, neither the Publisher nor the authors, contributors, or editors, assume any liability 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: 978-0-323-08721-6
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To my dear and loving wife, Rena.
Everything that I am, I am because of
you. You have been by my side with
unconditional love. You have been
behind me with your loyalty, patience,
and support. Thank you for being my
sweetheart and my best friend.
SERIES FOREWORD
I have been very gratified by the popularity and positive feedback that the authors of the Case Review series have received on the publication of the first and second editions of their volumes. Reviews in journals and word-of-mouth comments have been uniformly favorable. The authors have done an outstanding job filling the niche of an affordable, easy-to-read, case-based learning tool that supplements the material in The Requisites series. I have been told by residents, fellows, and practicing radiologists that the Case Review series is the ideal means for studying for oral board examinations and subspecialty certification tests.
Although some students learn best in a noninteractive study book mode, others need the anxiety or excitement of being quizzed. The selected format for the Case Review series (which consists of showing a few images needed to construct a differential diagnosis and then asking a few clinical and imaging questions) was designed to simulate the board examination experience. The only difference is that the Case Review texts provide the correct answer and immediate feedback. The limits and range of the readers knowledge are tested through scaled cases ranging from relatively easy to very hard. The Case Review series also offers a brief discussion of each case, a link back to the pertinent The Requisites volume, and up-to-date references from the literature.
Because of the popularity of this series, we have been rolling out the second and third editions of the Case Review volumes. The expectation is that these editions will bring the content up to the current knowledge limits of the field, introduce new modalities and new techniques, and provide new and even more graphic examples of pathology. To adjust to the upcoming change from an oral board examination to a computer-based one, the Case Review series has changed. We have moved to an even more engaging live platform through the use of the Internet. The questions have been reframed into multiple-choice format, the links are dynamic to online references, and feedback is interactive with correct and incorrect answers. Please see the website www.casereviewsonline.com to see how the Case Review series has evolved to prepare trainees for the board examinations and practitioners for reading specialty cases. Personally, I am very excited about the future. Join us.
David M. Yousem, MD, MBA
BOOK FOREWORD
When Drs. Halpert and Fescko declined the invitation to create the online version of the second edition of the Gastrointestinal Imaging Case Review Series, I asked around who was the man in gastrointestinal radiology these days. There was a consensus that the person with the most amazing material and the best talent for creating an online product was Vincent H.S. Low in Western Australia. Vincent accepted the offer eagerly and was immediately productive in creating a whole new feel and attraction to the cases and rewrote the material in expert fashion. The interactive format came alive in his hands, and the result is a vast improvement in the quality of the