This new text covers basic principles commonly found in the introduction to emergency medicine course. Comprised of five sections, diagnosis and management is presented from an emergency medicine perspective. It includes 75 case-based clinical vignettes to help students prepare for the course and clerkship as well as the USMLE. The common complaint section features a template covering differential history and physical, pathophysiology, and treatment of the given topics. Illustrations and line drawings supplement the text. Curricula objectives from the Society for Academic Emergency Medicine (SAEM) and the American College of Emergency Physicians (ACEP) are addressed.