Stage IIIB Appendix Carcinoma AJCC v9

**Semantic type:** Neoplastic Process

**Definition:** Stage IIIB includes: (T3, N1, M0, Any G); (T4, N1, M0, Any G). T3: Tumor invades through the muscularis propria into the subserosa or the mesoappendix. T4: Tumor invades the visceral peritoneum, including the acellular mucin or mucinous epithelium involving the serosa of the appendix or mesoappendix, and/or directly invades adjacent organs or structures. N1: Tumor involvement of one to three regional lymph nodes (tumor in lymph node measuring greater than or equal to 0.2 mm) or any number of tumor deposits is present with no tumor involvement in all identifiable lymph nodes. M0: No distant metastasis. (AJCC 9th ed.)

**Synonyms:** - Stage IIIB Appendiceal Carcinoma AJCC v9