label: Stage IV Gallbladder Cancer AJCC v7
label_lc: stage iv gallbladder cancer ajcc v7
description: "Stage IV includes: IVA (T4, N0-1, M0); IVB (Any T, N2, M0); (Any T, Any N, M1).  T4: Tumor invades the main portal vein or hepatic artery, or invades two or more extrahepatic organs or structures.  N0: No regional lymph node metastasis.  N1: Metastases to nodes along the cystic duct, common bile duct, hepatic artery, and/or portal vein. N2: Metastases to periaortic, pericaval, superior mesenteric artery, and/or celiac artery lymph nodes.  M0: No distant metastasis.  M1: Distant metastasis. (from AJCC 7th Ed.)"