The relationship of rhinitis and asthma, sinusitis, food allergy, and eczema.

Epidemiologic, genetic, immunologic, and clinical studies show a close relationship between allergic rhinitis and asthma, food allergy, and atopic dermatitis. Rhinitis and sinusitis often coexist and are commonly referred to with the term rhinosinusitis. These conditions are also linked in the so-called atopic march, which is the sequential appearance of atopic manifestations starting with atopic dermatitis and later followed by food allergy, allergic rhinitis, and asthma. Allergic rhinitis and asthma are now increasingly being approached diagnostically and therapeutically as the one-airway concept.