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Nasal Cavity Polyp
Definition 1
A soft and painless polypoid mass that arises from the mucosa in the nasal cavity. It is usually the result of an inflammatory process. It may recur following surgical resection. (NCI Thesaurus)
Definition 2
Focal accumulations of edema fluid in the nasal mucosa accompanied by hyperplasia of the associated submucosal connective tissue. Polyps may be neoplasms, foci of inflammation, degenerative lesions, or malformations. (NLM, Medical Subject Headings)
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