[Allergic rhinitis in the context of chronic rhinosinusitis].

Chronic Rhinosinusitis is one of the most frequent chronic diseases. A major cause is allergic rhinitis. Both illnesses and the combination of both, which is the topic of this educational article, as well as the clarification and therapy of differential diagnoses are belonging in the hands of the otorhinolaryngologist. Finally, it is not completely understood which mechanisms of the allergic inflammation in the nose lead or predispose in the individual patient to the development of a chronic sinus disease. A series of excellent national and international guidelines have been published supporting the otorhinolaryngologist in diagnostics and treatment of patients with allergic rhinosinusitis. This article presents the most important and actual diagnostic and therapeutic procedures for the treatment of this important chronic disease in children and adults.