Paranasal Sinus Adenoid Cystic Carcinoma

**Semantic type:** Neoplastic Process

**Definition:** A rare adenoid cystic carcinoma that arises from the paranasal sinuses. It usually has an aggressive clinical course characterized by high recurrence rates and distant metastases.

**Synonyms:** - Accessory Sinus Adenoid Cystic Carcinoma - Adenoid Cystic Carcinoma of Accessory Sinus - Adenoid Cystic Carcinoma of Paranasal Sinus - Adenoid Cystic Carcinoma of the Accessory Sinus - Adenoid Cystic Carcinoma of the Paranasal Sinus