label: Astler-Coller B1 Rectal Carcinoma
label_lc: astler-coller b1 rectal carcinoma
description: "Stage I includes: (T1, N0, M0) and (T2, N0, M0).  T1: Tumor invades submucosa.  T2: Tumor invades muscularis propria. (AJCC 6th ed.)"