The aim of this book is to focus on the Disorders of Thyroid. This book Disorders of Thyroid is the combined effort and collected wisdom of senior thyroidologists, radiologists, and endocrine surgeons in India. It is essential for young endocrinologists and physicians to get latest information and practical aspects of management of thyroid disorders. This book consists of 16 chapters, which include hypothyroidism, graves’ thyrotoxicosis, thyroid disorders during pregnancy, approach to the solitary thyroid nodule and cancer, thyroiditis, depression and hypothyroidism, subclinical hyperthyroidism, subclinical hypothyroidism, thyroid imaging, surgery in thyroid disorders, thyroid hormone resistance syndrome/resistance to thyroid hormone, thyroid-associated orbitopathy, juvenile hypothyroidism, neonatal hypothyroidism, and sick euthyroid syndrome. This book incorporated a few cases in each chapter to sustain the interest of the reader in the topic and to help them take a pragmatic approach to a thyroid disorder. This book also included few novel chapters like interpreting thyroid tests, depression, and thyroid, as it will help a young endocrinologists and physicians to interpret the laboratory results.