Low Grade Appendiceal Mucinous Neoplasm pTis TNM Finding v9

**Semantic type:** Finding

**Definition:** 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. (from AJCC 9th Ed.)

**Synonyms:** - Low-Grade Appendiceal Mucinous Neoplasm pTis TNM Finding v9 - pTis (LAMN) TNM Finding v9