This book presents selected topics on the tonsils and adenoids and related problems, providing insight into recent advances in the field. The airway and food passageway through the pharynx are of critical importance in our daily lives and contribute to our personal well-being and safety as well as our communication with others. However, it is only when disease or injury impairs its function that we appreciate the relevance of the pharynx. This book presents new clinical and research developments as well as future perspectives on airway and food-related problems and lesions. Chapters discuss benign and malignant tumors of the tonsils, the evolution of adenoid surgery, 3D exoscopic surgery (3Des) for tonsillectomy, the link between adenoids and nasopharyngeal carcinoma, therapeutic approaches in chronic adenoiditis, and peritonsillar and intratonsillar abscess.