Perihilar bile ducts (ICD10 C24.0)

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This is the data sheet for TNM 8th edition staging of the perihilar bile ducts (ICD10 C24.0)

For more detailed information regarding TNM staging, please see pages 87-88 of the UICC TNM 8 book or visit the Wiley and UICC website.

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

T value	Description
TX	Primary tumour cannot be assessed
T0	No evidence of primary tumour
Tis	Carcinoma in situ
T1	Tumour confined to the bile duct, with extension up to the muscle layer or fibrous tissue
T2a	Tumour invades beyond the wall of the bile duct to surrounding adipose tissue
T2b	Tumour invades adjacent hepatic parenchyma
T3	Tumour invades unilateral branches of the portal vein or hepatic artery
T4	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 value	Description
NX	Regional lymph nodes cannot be assessed
N0	No regional lymph node metastasis
N1	Metastases to 1–3 regional lymph nodes
N2	Metastases to 4 or more regional nodes

M value	Description
M0	No distant metastasis
M1	Distant metastasis - This includes metastasis to non-regional lymph nodes, including periaortic, pericaval, superior mesenteric artery and/or coeliac artery lymph nodes.

The pT categories correspond to the T categories as per above.

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