Preface Emergency medicine is a unique specialty that requires immediate decision making and action to prevent death or any further disability for patients in health crises. Emergency physicians need to see patients with a wide spectrum of medical and surgical conditions and with different degrees of severity. Clinical Quiz in Emergency Medicine is the first book of its kind written by emergency medicine specialists in Hong Kong. All cases are real situations encountered in local emergency medicine practice and each case will provide a visual diagnosis of various emergency problems. This book is intended for all health care professionals working in emergency departments, including junior trainees and higher trainees preparing for higher examination of emergency medicine. Most of our cases are written according to the expected standard of international Fellowship Examinations; they are precise and concise, with sufficient level of detail. EM specialists, both junior and senior, would also find