Stage 0 Low Grade Appendix Mucinous Neoplasm (LAMN) AJCC v9

**Semantic type:** Neoplastic Process

**Definition:** Stage 0 includes: Tis (LAMN), N0, M0. Tis (LAMN): Low-grade appendiceal mucinous neoplasm confined to the muscularis propria; Acellular mucin or mucinous epithelium may invade into the muscularis propria. T1 and T2 are not applicable to LAMN; Acellular mucin or mucinous epithelium that extends into the subserosa or serosa should be classified as T3 or T4a, respectively. N0: No tumor involvement of regional lymph node(s). M0: No distant metastasis. (AJCC 9th ed.)

**Synonyms:** - Stage 0 Low Grade Appendiceal Mucinous Neoplasm (LAMN) AJCC v9