Nasal cavity

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Author: Mikael Häggström [notes 1]

Nasal polyps

Look for signs of malignancy. Further information: Evaluation of suspected malignancies

Benign nasal polyp (not otherwise specified), consisting of hyperplastic edematous connective tissue with some seromucous glands and cells representing inflammation (mostly neutrophils and eosinophils). In early stages, the surface of the nasal polyp is covered by normal respiratory epithelium, but later it undergoes metaplastic change to squamous type epithelium (because of the constant irritation and inflammation). The submucosa shows large intercellular spaces filled with serous fluid.[1]

Main differential diagnoses:


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  1. Michaels, Leslie (2012-12-06) (in en). Ear, Nose and Throat Histopathology . Springer Science & Business Media. p. 168. ISBN 9781447133322.