For hepatocellular carcinoma: Stage II includes: T2, N0, M0. T2: Solitary tumor with vascular invasion or multiple tumors none more than 5 cm. N0: No regional lymph node metastasis. M0: No distant metastasis. For intrahepatic cholangiocarcinoma: Stage II includes: T2, N0, M0. T2: Solitary tumor with vascular invasion or multiple tumors, with or without vascular invasion. N0: No regional lymph node metastasis. M0: No distant metastasis. (from AJCC 7th Ed.) [from
NCI]