Thyroid Disease: A Case-Based and Practical Guide for Primary Care is designed to help primary care doctors diagnose and manage patients with thyroid disease in the office. It includes case studies to illustrate the problems and discussions of how to go about testing, arrive at a diagnosis, and initiate treatment and follow up evaluations. Part I presents cases illustrating the more common thyroid problems seen in practice and includes a brief discussion of thyroid physiology and testing. Part II covers the more difficult and challenging thyroid problems and includes expert views on some controversial issues in the management of the thyroid patient.