Sinonasal Neuroendocrine Carcinoma

**Semantic type:** Neoplastic Process

**Definition:** A rare neuroendocrine carcinoma that arises from the nasal cavity and paranasal sinuses. It is classified as small cell or large cell neuroendocrine carcinoma.

**Synonyms:** - Nasal Cavity and Paranasal Sinus Neuroendocrine Carcinoma