Sinonasal Spindle Cell Squamous Carcinoma

**Semantic type:** Neoplastic Process

**Definition:** A poorly differentiated squamous cell carcinoma arising from the sinonasal tract. It is characterized by the presence of malignant cells with spindle cell features.

**Synonyms:** - Nasal Cavity and Paranasal Sinus Spindle Cell (Sarcomatoid) Squamous Cell Carcinoma - Nasal Cavity and Paranasal Sinus Spindle Cell Squamous Cell Carcinoma - Sinonasal Spindle Cell (Sarcomatoid) Squamous Cell Carcinoma - Sinonasal Spindle Cell Squamous Cell Carcinoma