C202991Level 8
Sinonasal Neuroendocrine Tumor
**Semantic type:** Neoplastic Process
**Definition:** A neuroendocrine tumor that arises from the sinonasal tract.
**Synonyms:** - Sinonasal Well Differentiated Neuroendocrine Neoplasm - Sinonasal Well-Differentiated Neuroendocrine Neoplasm
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