Quick Guide to Endocrinology, The Pediatric Version, Second Edition, continues to be an essential resource which focuses on the physiology, diagnostics, and laboratory testing of endocrine (hormone-mediated) disorders encountered in the field of endocrinology with expanded coverage of pediatric endocrinology. The guide is for laboratory scientists and technicians, as well as trainees and clinicians in the field of pediatrics and pediatric endocrinology including fellows, residents, medical students, nursing students, and advance practice providers and students. It is presented in an easy to read, quick format, the physiology and method of measurement for hormones essential to many bodily processes and how their dysregulation results in disease. The characteristics of such diseases and diagnostic testing including up-to-date molecular testing is addressed.