Part of Cancer staging guidance sheets
Perihilar bile ducts (ICD10 C24.0)
Introduction
This is the data sheet for TNM 9th edition staging of the perihilar bile ducts (ICD10 C24.0)
For more detailed information regarding TNM staging, please see pages 89-90 of the UICC TNM 9 book.
Stage groupings
|
Stage Group |
T stage |
N stage |
M stage |
|---|---|---|---|
|
Stage 0 |
Tis |
N0 |
M0 |
|
Stage I |
T1 |
N0 |
M0 |
|
Stage II |
T2a, T2b |
N0 |
M0 |
|
Stage IIIA |
T3 |
N0 |
M0 |
|
Stage IIIB |
T4 |
N0 |
M0 |
|
Stage IIIC |
Any T |
N1 |
M0 |
|
Stage IVA |
Any T |
N2 |
M0 |
|
Stage IVB |
Any T |
Any N |
M1 |
TNM clinical classification
T - primary tumour
|
T value |
Description |
|---|---|
|
cTX |
Primary tumour cannot be assessed |
|
cT0 |
No evidence of primary tumour |
|
cTis |
Carcinoma in situ |
|
cT1 |
Tumour confined to the bile duct, with extension up to the muscle layer or fibrous tissue |
|
cT2a |
Tumour invades beyond the wall of the bile duct to surrounding adipose tissue |
|
cT2b |
Tumour invades adjacent hepatic parenchyma |
|
cT3 |
Tumour invades unilateral branches of the portal vein or hepatic artery |
|
cT4 |
Tumour invades the main portal vein or its branches bilaterally; or the common hepatic artery; or unilateral second‐order biliary radicals with contralateral portal vein or hepatic artery involvement |
N - regional lymph nodes
|
N value |
Description |
|---|---|
|
cNX |
Regional lymph nodes cannot be assessed |
|
cN0 |
No regional lymph node metastasis |
|
cN1 |
Metastases to 1–3 regional lymph nodes |
|
cN2 |
Metastases to 4 or more regional nodes |
M - distant metastasis
|
M value |
Description |
|---|---|
|
cM0 |
No distant metastasis |
|
cM1 |
Distant metastasis |
TNM pathological classification
pT - primary tumour
The pT and pN categories correspond to the cT and cN categories as per above.
pN - regional lymph nodes
|
pN value |
Description |
|---|---|
|
pN0 |
Histological examination of a regional lymphadenectomy specimen will ordinarily include 15 more lymph nodes. If the regional lymph nodes are negative, but the number ordinarily examined is not met, classify as pN0 |
Last edited: 16 January 2026 4:12 pm
