NCIt synonyms : Stage I Anal Canal and Perianal (Anal Margin) Carcinoma AJCC v9; Stage I Anal Carcinoma AJCC v9;
NCIt definition : Stage I includes: T1, N0, M0. T1: Tumor less than or equal to 2 cm in greatest dimension.
N0: No tumor involvement of regional lymph node(s). M0: No distant metastasis. (AJCC
9th ed.);