| Primary Tumor (T) | |
| Regional Lymph Nodes (N) | |
| Distant Metastasis (M) | |
This view displays the TNM formula. Please select appropriate value from the list for T/N/M variables. The result will be displayed, based on your selection of variables.
Definition of Primary Tumor (T)
| T Category | T Criteria |
|---|---|
| TX | Primary tumor cannot be assessed |
| Tis | Carcinoma in situ/high-grade dysplasia |
| T1 | Tumor invades the bile duct wall with a depth less than 5 mm |
| T2 | Tumor invades the bile duct wall with a depth of 5-12 mm |
| T3 | Tumor invades the bile duct wall with a depth greater than 12 mm |
| T4 | Tumor involves the celiac axis, superior mesenteric artery, and/or common hepatic artery |
Definition of Regional Lymph Node (N)
| N Category | N Criteria |
|---|---|
| NX | Regional lymph nodes cannot be assessed |
| N0 | No regional lymph node metastasis |
| N1 | Metastasis in one to three regional lymph nodes |
| N2 | Metastasis in four or more regional lymph nodes |
Definition of Distant Metastasis (M)
| M Category | M Criteria |
|---|---|
| M0 | No distant metastasis |
| M1 | Distant metastasis |