Paranasal Sinus Mucocele

**Semantic type:** Finding

**Definition:** Epithelium-lined, mucus-containing cystic masses filling one or more of the paranasal sinuses.

**Synonyms:** - Accessory Sinus Mucocele - Mucocele of Accessory Sinus - Mucocele of Nasal Sinus - Mucocele of Paranasal Sinus - Mucocele of the Accessory Sinus - Mucocele of the Nasal Sinus - Mucocele of the Paranasal Sinus - Nasal Sinus Mucocele