This fully revised and expanded second edition provides a comprehensive and up-to-date overview of nasal rhinitis polyposis, a condition that not only decreases patients’ quality of life, but also affects the connections between the upper and lower respiratory tract, making its treatment of critical importance. New research findings, as well as new technical innovations, have changed the conventional medical and surgical approaches to the treatment of nasal polyposis, which has resulted in significant advances in the management of the disease. This reader-friendly and richly illustrated book gathers contributions by authors internationally recognized for their outstanding laboratory research and clinical practice. This second edition includes the latest information, together with new chapters on nasal polyposis endotyping, Asian polyps, epithelial barrier in nasal polyposis, biologics of nasal polyposis, microbiome of nasal polyposis, eosinophil & nasal polyposis, nasal polyposis in children, staphylococcus aureus, superantigens and nasal polyps, and antifungal treatment in chronic sinusitis. It offers comprehensive information to help readers improve the daily management of patients affected by nasal polyposis.