Completely updated for its Ninth Edition, this classic text provides comprehensive coverage of every aspect of thyroid anatomy, development, biochemistry, physiology, pathophysiology, and treatment of all thyroid disorders. This edition has a more international group of contributors and new chapters on mortality in thyroid disease, oncogenes, radioiodine treatments for carcinoma, trophoblastic tumors, and subacute and acute infectious thyroiditis. Chapters address clinical controversies regarding subclinical hypothyroidism and hyperthyroidism. The section on laboratory assessment of thyroid function has been reorganized for easier look-up of function tests.