Nasal cytological eosinophilia is a simple, fast, nontraumatic, and inexpensive method in the evaluation of patients with nasal polyposis. Eosinophilic infiltration of the nasal mucosa is characteristic of nasal polyposis. It correlates with the stage of the disease and tends to be higher in patients with asthma, nasal polyposis, and nonsteroidal anti-inflammatory drug intolerance (acetyl-salicylic acid triad).
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