This text provides a comprehensive review of RADIOLOGIA in thyroid and parathyroid diseases. These topics are presented from a vantage point of complex decision-making encountered in real clinical scenarios. The sections are organized according to a logical structure covering benign and malignant thyroid conditions, parathyroid disease, and RADIOLOGIA technology, RADIOLOGIA-guided interventions, and innovations. The style of the chapters provide practical, actionable information that is richly illustrated with figures and links to video cine-clips. The chapter topics aim to show how different specialists uniquely apply RADIOLOGIA in given clinical scenarios. The text illustrates the optimal incorporation of current practice guidelines, as this remains varied and inconsistent among clinicians. The content is written by invited experts who perform RADIOLOGIA in their daily clinical practices and participate in teaching RADIOLOGIA nationally and internationally.