Sinonasal Non-Keratinizing Squamous Cell Carcinoma

**Semantic type:** Neoplastic Process

**Definition:** A squamous cell carcinoma of the sinonasal tract characterized by a plexiform or ribbon-like growth pattern, cytological atypia, and lack of histological evidence of keratinization.

**Synonyms:** - Non-Keratinizing Sinonasal Squamous Cell Carcinoma - Ringertz Carcinoma - Schneiderian Carcinoma - Schneiderian carcinoma - Sinonasal Cylindrical Cell Carcinoma - Sinonasal Schneiderian Carcinoma - Sinonasal Transitional Cell Carcinoma