In this issue of Otolaryngologic Clinics, guest editors Drs. Devyani Lal, Angela Donaldson, and David Jang bring their considerable expertise to the topic of Unified Airway Disease. Unified airway disease is a recently defined entity that alludes to inflammation disease processes that involve both upper and lower airway, and co-management of these conditions by otolaryngologists and allergy immunologists often result in improved outcomes. In this issue, experts in the field provide a thorough overview of the pathophysiology, diagnosis, and management of unified airway disease through the perspective of an otolaryngologist co-managing the patient with an allergy-immunology colleague.<ul><li><p>Contains 16 practice-oriented topics including environmental factors; eosinophilic disease; non-eosinophilic and granulomatous disease; cystic fibrosis; pediatric unified airway disease; unified airway disease medical and surgical management; future directions; and more. </p></li><li><p>Provides i