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Bile Duct Cancer Stages
Bile Duct Cancer Stages
The stage of bile duct cancer describes how far the cancer has grown and whether it has spread. Staging helps your doctors determine treatment options and estimate prognosis. One reason bile duct cancer staging can seem complicated is that intrahepatic, perihilar, and distal bile duct cancers each have their own staging criteria.
THE BASICS: Bile duct cancer is generally staged from stage 0 through stage IV using the TNM system. However, the exact criteria depend on whether the tumor is intrahepatic, perihilar, or distal. Doctors also consider whether the tumor is resectable, meaning it can be completely removed with surgery.
What does TNM mean?
T: Tumor
The T category describes the size of the tumor and how far it has grown into nearby tissue or structures.
N: Nodes
The N category describes whether cancer has spread to nearby lymph nodes.
M: Metastasis
The M category describes whether cancer has spread to distant organs.
Stage 0
Stage 0 is sometimes called carcinoma in situ or high-grade dysplasia. Abnormal cells are confined to the innermost lining of the bile duct and have not invaded deeper tissue.
Stage I
Stage I generally describes an early cancer that remains relatively limited to the bile duct or nearby tissue. The exact definition depends on tumor location. For example, intrahepatic stage I disease depends largely on tumor size, while distal bile duct staging considers how deeply the cancer has grown into the bile duct wall.
Stage II
Stage II generally means the cancer has grown farther into surrounding tissue, blood vessels, or nearby lymph nodes. Again, the criteria differ according to where the cancer began.
Stage III
Stage III bile duct cancer is generally more locally advanced. The cancer may involve:
Major blood vessels
Nearby organs
Liver tissue
Multiple nearby lymph nodes
Stage IV
Stage IV generally means the cancer has spread extensively to lymph nodes or distant parts of the body. Possible sites of metastasis include:
Lungs
Bones
Distant lymph nodes
Abdominal lining
Other organs
Resectable versus unresectable bile duct cancer
In addition to the stage number, doctors often describe bile duct cancer as resectable or unresectable.
Resectable
The tumor can potentially be completely removed with surgery.
Unresectable
The cancer cannot be completely removed with surgery. This may be because:
The tumor involves critical blood vessels
It has grown too extensively into nearby structures
It has spread to distant parts of the body
Surgery would not be safe because of other medical conditions
Whether bile duct cancer is resectable is one of the most important factors in determining treatment.
Recurrent bile duct cancer
Recurrent bile duct cancer means cancer has returned after treatment. It can recur:
Near the original tumor
In the liver
In nearby lymph nodes
In distant organs