Appendix Neuroendocrine Tumor

**Semantic type:** Neoplastic Process

**Definition:** A well-differentiated, low-, intermediate-, or high-grade neoplasm with neuroendocrine differentiation that arises from the appendix.

**Synonyms:** - Appendix NET - Appendix Well Differentiated Neuroendocrine Neoplasm - Appendix Well-Differentiated Neuroendocrine Neoplasm