Section I. History and Basic Concepts -- The History of Clinical Ultrasound -- Physics and Principles of Ultrasound -- Practical Concepts of Ultrasound -- Section II. Thyroid and Parathyroid Glands -- Sonography of the Normal Thyroid -- Benign Thyroid Conditions -- Malignant Thyroid Conditions -- Ultrasound Surveillance -- Parathyroid Ultrasound -- Fine Needle Aspiration Cytology -- Section III. Lymph Nodes and the Neck -- Lymph Nodes -- Benign Clinical Conditions in the Adjacent Neck -- Section IV. New Advances in Applied Ultrasound -- Thyroid Elastography -- Percutaneous Ethanol Injection for Thyroid and Parathyroid Disorders -- Contrast Enhanced Ultrasound and Ultrasound-Guided Minimally Invasive Therapy for the Diagnosis and Treatment of Focal Thyroid Lesions.