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We evaluated cytograms and tissue sections of nasal polyps and mucosa of 30 patients with chronic allergic and nonallergic rhinitis. We compared them with cytograms and biopsies of 20 asymptomatic persons. We noticed a presence of neutrophils in cytograms and in biopsies of patients with allergic rhinitis and with nonallergic eosinophilic rhinitis. We observed the metaplasia of endothelium in allergic rhinitis, aspirin intolerance and in control group. The obtained data create integral view of alterations on the surface and inside of mucosa. Their analysis permits for correct classification and treatment of rhinitis.