NCIt synonyms : Polyp of Maxillary Sinus; Maxillary Antral Polyp; Polyp of the Maxillary Sinus;
NCIt definition : A polyp that arises from the maxillary sinus mucosa. It is characterized by the presence
of edematous tissue infiltrated by inflammatory cells, including eosinophils. Causes
include allergic rhinitis, chronic sinusitis, and cystic fibrosis.;