High Grade Paranasal Sinus Sarcoma

**Semantic type:** Neoplastic Process

**Definition:** An aggressive malignant soft tissue neoplasm that arises from the paranasal sinus. It is characterized by the presence of high-grade histologic features.

**Synonyms:** - High Grade Accessory Sinus Sarcoma - High Grade Sarcoma of Accessory Sinus - High Grade Sarcoma of Paranasal Sinus - High Grade Sarcoma of the Accessory Sinus - High Grade Sarcoma of the Paranasal Sinus