| 1 |
**Localized only (localized, NOS)**
* Confined to site of origin |
| 2 |
**Regional by direct extension only**
* All sites
- Adjacent connective tissue, NOS
- Adjacent organs/structures, NOS
- Bone/cartilage
* Retroperitoneum (C480)
- Adrenal(s) (suprarenal gland(s))
- Aorta
- Colon (ascending and descending)
- Kidney(s)
- Pancreas
- Vena cava
- Vertebra
* Peritoneum (C481, C482, C488)
- Colon (except ascending and descending colon)
- Esophagus
- Gallbladder
- Liver
- Small intestine
- Spleen
- Stomach |
| 3 |
**Regional lymph node(s) involved only**
* Intra-abdominal
* Paracaval
* Pelvic
* Subdiaphragmatic
* 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 site(s) (including further contiguous extension)
- Peritoneum (C481, C482, C488)
+ Colon (ascending and descending colon)
* Distant lymph node(s), NOS
* Distant metastasis, NOS
- Carcinomatosis
- Distant mets WITH or WITHOUT distant lymph node(s) |
| 9 |
Unknown if extension or metastasis |
