NCIt synonyms : Polyp of Sphenoidal Sinus; Polyp of the Sphenoid Sinus; Polyp of the Sphenoidal Sinus; Polyp of Sphenoid Sinus; Sphenoidal Sinus Polyp;
NCIt definition : A polyp that arises from the sphenoid 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.;