label: Stage I Gallbladder Cancer AJCC v6
label_lc: stage i gallbladder cancer ajcc v6
description: "Stage I includes: IA: (T1, N0, M0); IB: (T2, N0, M0). T1: Tumor invades lamina propria or muscle layer.  T1a: Tumor invades lamina propria.  T1b: Tumor invades muscle layer.  N0: No regional metastasis.  M0: No distant metastasis. (AJCC 6th ed.)"