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Calif Med. 1950 Jul;73(1):39-41.

Cytology of the postnasal drip.


About half of a series of 100 consecutive patients with disturbances of the eyes, ears, nose or throat complained of postnasal drip. When smears of the mucous discharge were examined it was found that in about a third of the cases in which there was complaint of drip, neither eosinophils nor neutrophils could be demonstrated. This indicates that causes of the drip other than allergic disease and infection must be considered.Cytologic examination of the postnasal drip showed that about one-third of the patients with nasal disease or histories positive for allergic reaction had nasal eosinophilia. Nasal eosinophilia was noted occasionally in patients with normal-appearing nasal structures and in patients with no history of allergic disease.

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