Stages

If extrahepatic bile duct cancer is diagnosed, the doctor needs to know the stage, or extent, of the disease to plan the best treatment. Staging is a careful attempt to find out whether the cancer has spread, and if so, to what parts of the body.

The following stages are used for Extrahepatic Bile Duct cancer:

Stage 0 (Carcinoma in Situ) 
In stage 0, abnormal cells are found in the innermost layer of tissue lining the extrahepatic bile duct. These abnormal cells may become cancer and spread into nearby normal tissue. Stage 0 is also called carcinoma in situ.

Stage I 
In stage I, cancer has formed. Stage I is divided into stage IA and stage IB.
  • Stage IA - The cancer is found in the bile duct only 
  • Stage IB - The cancer has spread through the wall of the bile duct 
Stage II
Stage II is divided into stage IIA and stage IIB
  • Stage IIA - Cancer has spread to the liver, gallbladder, pancreas and/or to either the right or left branch of the hepatic artery or to the right or left branch of the portal vein. 
  • Stage IIB - Cancer has spread to nearby lymph nodes and is found in the bile duct or through the wall of the bile duct or has spread to the liver, gallbladder, pancreas and/or to either the right or left branch of the hepatic artery or to the right or left branch of the portal vein. 
Stage III 
In stage III, cancer has spread to the main portal vein or to both right and left branches of the portal vein; or to the hepatic artery or to other nearby organs or tissues, such as the colon, stomach, small intestine or abdominal wall. Cancer may have spread to nearby lymph nodes.

Stage IV
In stage IV, cancer has spread to lymph nodes and/or organs not near the extrahepatic bile duct.

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