Now in a revised and expanded third edition, this case-based guide emphasizes the latest investigative advances in both imaging and molecular diagnostics and new treatment approaches for a wide variety of common and complex endocrine conditions. <div> </div>Utilizing unique clinical case histories, each main endocrine condition and disorder is curated by a senior Section Editor with an introduction to his or her area covering both physiology and pathophysiology. This introductory chapter is followed by a number of case histories written by invited experts and designed to cover the important relevant pathophysiology, following a consistent chapter format for ease of use, including bulleted objectives, case presentations, review of the diagnosis, lessons learned, and 3-5 multiple-choice review questions.