Internal Medicine Essentials will help students care for patients, prepare for clinical rounds, and study for the end of rotation examination. A collaborative project of the American College of Physicians and the Clerkship Directors in Internal Medicine, Internal Medicine Essentials provides medical students with an authoritative educational resource that can be used to augment learning during the third-year internal medicine clerkship. This concise textbook is updated annually with the best available evidence and is designed to be read cover-to-cover during the clerkship. Printed content is enhanced with additional materials, such as clinical photographs, tables, screening tools, and other instruments available on the Internet. Internal Medicine Essentials is unique, created by faculty who helped design the internal medicine curriculum and who are actively involved in teaching students on the Internal Medicine clerkship. The content is based upon The Core Medicine Clerkship Curriculum Guide, a nationally recognized curriculum for the third-year internal medicine clerkship, created and published by the Clerkship Directors in Internal Medicine and the Society for General Internal Medicine. Internal Medicine Essentials is written by 68 authors, most of whom are either Internal Medicine clerkship directors or clerkship faculty, representing 48 different medical schools.