| CLIN |
PATH |
DEFINITIONS |
| |
|
PRIMARY
TUMOR (T) |
|
|
|
TX |
Primary tumor cannot be
assessed |
|
|
|
T0 |
No evidence of primary
tumor |
|
|
|
Tis |
Carcinoma in situ: |
|
|
|
T1 |
Tumor invades mucosa or
muscle layer |
|
|
|
|
T1a |
Tumor invades mucosa |
|
|
|
|
T1b |
Tumor invades muscle layer |
|
|
|
T2 |
Tumor invades perimuscular
connective tissue; no extension beyond serosa or into
liver |
|
|
|
T3 |
Tumor perforates (visceral
peritoneum) or directly invades into one adjacent organ,
or both (extension 2 cm or less into liver) |
|
|
|
T4 |
Tumor extends more than 2
cm into liver, and/or into two or more adjacent organs
(stomach, duodenum, colon, pancreas, omentum,
extrahepatic bile ducts, any involvement of liver) |
| |
|
LYMPH
NODES (N) |
|
|
|
NX |
Regional lymph nodes cannot
be assessed |
|
|
|
N0 |
No regional lymph node
metastasis |
|
|
|
N1 |
Metastasis in cystic duct,
pericholedochal, and/or hilar lymph nodes, i.e., in
hepatoduodenal ligament |
|
|
|
N2 |
Metastasis in
peripancreatic (head only), periduodena, periportal,
celiac, and/or superior mesenteric lymph nodes |
| |
|
DISTANT
METASTASIS (M) |
|
|
|
MX |
Presence of distant
metastasis cannot be assessed |
|
|
|
M0 |
No distant metastasis |
|
|
|
M1 |
Distant metastasis |