Definition

Stage II is divided into stages IIA and IIB. In stage IIA, cancer has spread (1) fewer than 5 millimeters into the wall of the distal bile duct and has spread to 1 to 3 nearby lymph nodes; or (2) 5 to 12 millimeters into the wall of the distal bile duct. In stage IIB, cancer has spread 5 millimeters or more into the wall of the distal bile duct. Cancer may have spread to 1 to 3 nearby lymph nodes.