ABSTRACT
The coexistence of rhinitis and sinusitis with asthma became widely appreciated by physicians during the past century. Only recently, however, have researchers begun to realize that the upper airway actively modulates lung function in a number of important ways. This dynamic relationship between the upper and lower airways has important therapeutic implications for all clinicians who treat asthma. In fact, there is an emerging body of data suggesting that aggressive treatment of allergic rhinitis and chronic sinusitis may improve asthma outcomes.
