Asthma and sinusitis: association and implication.

Background: Sinusitis occurs frequently in asthmatic patients. Epidemiologic data on sinusitis and lower airway disease must be evaluated with caution because they are based mostly on symptoms and do not include nasal endoscopic or computed tomography (CT) findings. Clinical support and evidence for this association are lacking.

Links between bronchial asthma and allergic rhinitis in the Oita Prefecture, Japan.

Recent studies have strengthened the concept that bronchial asthma and allergic rhinitis are manifestations of an inflammatory process within a continuous airway. This study was performed to compare clinical findings in asthma with or without rhinitis in Japan. Nasal symptoms were present in 99.