ALLERGIC DISEASE OF THE RESPIRATORY TRACT
The nature of the respiratory process involves inhalation of airborne allergens. As a result, the components of the respiratory tract, including the nose, sinuses, and lungs, are disproportionately affected by allergic disease. In clinical practice, the common manifestations include seasonal or perennial allergic rhinitis, allergic sinusitis, and allergic asthma. The former two are often described together as allergic rhinosinusitis. Although clinically distinct, each condition involves similar underlying immunologic processes.