| 0 |
**In situ, intraepithelial, noninvasive** |
| 1 |
**Localized only (localized, NOS)**
- Ampulla of Vater
- Confined to ampulla, NOS
- Duodenal submucosa
- Perisphincteric invasion (invasion beyond sphincter of Oddi)
- Sphincter of Oddi |
| 2 |
**Regional by direct extension only**
- Blood vessel(s) (major)
+ Common hepatic artery
+ Portal vein
+ Superior mesenteric artery
- Celiac axis
- Common bile duct
- Duodenum, NOS
- Extrahepatic bile duct(s)
- Gallbladder
- Hepatic flexure of colon
- Lesser omentum
- Liver including porta hepatis
- Muscularis propria of the duodenum (duodenal wall)
- Pancreas
- Stomach (distal, proximal, NOS)
- Transverse colon |
| 3 |
**Regional lymph node(s) involved only**
- Anterior to ampulla of Vater
- Inferior to ampulla of Vater
- Posterior to ampulla of Vater
- Superior to ampulla of Vater
- Celiac
- Hepatic
- Hepatic artery
- Lateral aortic (lumbar)
- Node of foramen of the Winslow (epiploic) (omental)
- Pancreaticoduodenal
- Peripancreatic (excluding nodes at tail of pancreas)
- Periportal (portal vein)
- Proximal mesenteric
- Pyloric (infrapyloric, subpyloric)
- Retroperitoneal
- Superior mesenteric
- Regional lymph node(s), NOS
+ Lymph node(s), NOS |
| 4 |
**Regional by BOTH direct extension AND regional lymph node(s) involved**
- Codes (2) + (3) |
| 7 |
**Distant site(s)/lymph node(s) involved**
- Distant sites (including further contiguous extension)
+ Periduodenal or peripancreatic soft tissue
- Distant lymph node(s), NOS
+ At tail of pancreas
+ Para-aortic
+ Splenic
- Distant metastasis, NOS
+ Carcinomatosis
+ Distant mets WITH or WITHOUT distant lymph node(s) |
| 9 |
Unknown if extension or metastasis |
