This book follows the traditional Mortality and Morbidity Rounds format of case presentations followed by discussion. M&M Rounds are an excellent training mechanism because they are case-based and allow clinicians to vicariously experience the missteps of their colleagues before they walk down the same path. This book is built around 100 true emergency department patient encounters chosen to reveal the typical (and usually avoidable) ways a case can go wrong. Whether it's a matter of miscommunication, perceived rudeness, too limited differential diagnosis, or failure to recognize key signs and symptoms, these cases dramatically demonstrate the pitfalls that both novice and experienced clinicians can encounter.