Paranasal Sinus Inverted Papilloma

**Semantic type:** Neoplastic Process

**Definition:** A benign neoplasm that arises from the ciliated respiratory mucosa that lines the paranasal sinuses. It results from the invagination and proliferation of epithelial cells in the underlying stroma.

**Synonyms:** - Accessory Sinus Inverted Papilloma - Accessory Sinus Inverting Papilloma - Inverted Papilloma of Accessory Sinus - Inverted Papilloma of Paranasal Sinus - Inverted Papilloma of the Accessory Sinus - Inverted Papilloma of the Paranasal Sinus - Inverting Papilloma of Accessory Sinus - Inverting Papilloma of Paranasal Sinus - Inverting Papilloma of the Accessory Sinus - Inverting Papilloma of the Paranasal Sinus - Paranasal Sinus Inverted Schneiderian Papilloma - Paranasal Sinus Inverting Papilloma