This book is written for the primary care clinician to help update knowledge of pediatric endocrinology (with an emphasis on diabetes) from both ancient and modern times. The current and future shortage of pediatric endocrinologists necessitates steady, rejuvenated information on diabetes and other endocrine disorders for primary care clinicians as they care for the child and adolescent with complex endocrine dilemmas and disorders. In view of this shortage and the rapidly increasing knowledge in pediatric diabetes as well as understanding indications for referral to pediatric endocrinologists in the 21st century, au courant assiduous information aimed at primary care clinicians in these areas becomes increasingly important.