Paranasal Sinus Polyp

**Semantic type:** Disease or Syndrome

**Definition:** A polyp that arises from the paranasal sinus mucosa. Causes include allergic rhinitis, chronic sinusitis, and cystic fibrosis. It is characterized by the presence of edematous tissue infiltrated by inflammatory cells, including eosinophils.

**Synonyms:** - Accessory Sinus Polyp - Polyp of Accessory Sinus - Polyp of Paranasal Sinus - Polyp of the Accessory Sinus - Polyp of the Paranasal Sinus