Anatomy and physiology.- Biochemical investigations.- Other investigations.- Clinical investigation of the thyroid.- Iodine and the thyroid gland in health and sickness.- Autoimmunity and the thyroid gland.- Growth regulation of the thyroid gland.- Thyroiditis, pathogenesis.- Causes of hypothyroidism.- Symptoms of hypothyroidism.- Threatment of hypothyroidism.- Subclinical hypothyroidism.- Myxoedema coma.- Causes of thyrotoxicosis.- Symptoms of thyrotoxicosis.- Treatment options in hyperthyroidism.- Graves\' disease.- Thyroid-associated ophthalmopathy.- Autonomous adenoma.- Toxic multinodular goitre.- Subclinical thyrotoxicosis.- Thyrotoxicosis in the elderly.- Thyrotoxic crisis/thyroid storm.- Thyroiditis - clinical aspects.- Subacute thyroiditis.- Other causes of thyrotoxicosis.- Non-toxic goiter.- Thyroid lumps.- Thyroid cancer.- The thyroid and pregnancy. Thyroid disease in adolescents.- Medicines and other medical preparations and the thyroid.- Thyroid hormone resistance.