label: Stage I Ampulla of Vater Cancer AJCC v7
label_lc: stage i ampulla of vater cancer ajcc v7
description: Stage I includes: IA (T1, N0, M0); IB (T2, N0, M0). T1: Tumor limited to ampulla of Vater or sphincter of Oddi.  T2: Tumor invades duodenal wall.  N0: No regional lymph node metastasis.  M0: No distant metastasis. (from AJCC 7th Ed.)