Fig. 2

a) Diff-Quik staining of a nasal cytospin showing nasal ciliated epithelial cells (arrow) and nasal inflammatory cells (eosinophils and neutrophils) stained with Diff-Quik. The nuclei and cytosol of the epithelial cells and neutrophils are stained in purple/blue, cytosol of eosinophil granules is stained in red (broken arrow). Original magnification: x400. b) The total number of nasal inflammatory cells is significantly increased in the persistent untreated nonallergic rhinitis (NAR) patients compared both to control normal subjects (NS) and the persistent NAR patients under regular treatment with nasal glucocorticoids (NAR + GC), without any significant difference between control subjects and persistent NAR patients under regular treatment with nasal glucocorticoids