|
| Stage | I | II | III | IV |
|
| Capsular invasion | No capsular invasion (S0) | Suspected capsular invasion (S1) | Marked capsular invasion (S2) | Direct invasion of adjacent viscera (S3) |
|
| Hepatic invasion | No hepatic invasion (Hinf0) | Suspected hepatic invasion (Hinf1) | Marked hepatic invasion around gallbladder (Hinf2) | Extensive hepatic invasion (Hinf3) |
|
| Bile duct invasion | No involvement of extrahepatic bile duct (Binf0) | Suspected involvement of bile duct (Binf1) | Marked biliary involvement (Binf2) | Extensive involvement of bile duct (Binf3) |
|
| Lymph node metastases | No lymph node metastasis (N0) | Metastases to lymph nodes around extrahepatic bile duct (primary group, N1) | Metastases in lymph nodes of hepatoduodenal ligament (secondary group, N2) OR surrounding area (tertiary group, N3) | Metastases more distant than in stage III (fourth group, N4) |
|
| Liver metastasis | No liver metastases (H0) | No liver metastases (H0) | No liver metastases (H0) | Liver metastases in 1 lobe (H1)
OR
Small liver metastases in bilateral lobes (H2)
OR
Multiple liver metastases in bilateral lobes (H3) |
|
| Peritoneal dissemination | No peritoneal dissemination (P0) | No peritoneal dissemination (P0) | No peritoneal dissemination (P0) | Peritoneal dissemination near tumour (P1)
OR
Small number of peritoneal disseminations distant from tumour (P2)
OR
Multiple peritoneal disseminations distant from tumour (P3) |
|
