Appendix Neuroendocrine Tumor pT4 TNM Finding v9

**Semantic type:** Finding

**Definition:** Appendix neuroendocrine tumor perforating the peritoneum or directly invading other adjacent organs or structures (excluding direct mural extension to adjacent subserosa of adjacent bowel), e.g., abdominal wall and skeletal muscle. (from AJCC 9th Ed.)

**Synonyms:** - Appendiceal Neuroendocrine Tumor pT4 TNM Finding v9