PART I THYROID: Thyroid gland: anatomy and physiology.- Classification of thyroid diseases.- Iodine deficiency and thyroid dysfunction.- Techniques to study thyroid function and morphology.- Medical and surgical treatment.- PART II OBESITY and METABOLIC SYNDROME: Obesity and metabolic syndrome: the new pandemic.- Classification and diagnosis.- Medical and surgical treatment.- Techniques to study metabolism.- PART III THYROID, METABOLISM and OBESITY: Link between thyroid dysfunction and metabolic syndrome.- Muscle tissue and hypothyroidism.- Thyroid function and effects on cardiovascular system.- Obesity, adipokines and thyroid dysfunction.- Adipokines and thyroid malignancies.- Link between thyroid tumors and metabolism.- PART IV CLINICAL CASES.