| 1 |
Localized only (localized, NOS)
- Appendicular (C400-C403, C408-C411, C413, C418-C419)
+ Confined to cortex of bone
+ Extension beyond cortex to periosteum (no break in periosteum)
- Spine (C412)
+ Confined to spine, NOS (number of segments involved not known)
+ Involvement of single or multiple adjacent vertebral segment(s)
- Pelvis (C414)
+ Confined to pelvis, NOS (number of segments involved not known and WITHOUT or UNKNOWN if extraosseous extension)
+ One to four pelvic segments involved WITHOUT or UNKNOWN if extraosseous extension |
| 2 |
Regional by direct extension only
- All sites
+ Extraosseous extension (beyond periosteum to surrounding tissues, including adjacent skeletal muscle(s))
- Appendicular (C400-C403, C408-C411, C413, C418-C419)
+ Adjacent bone/cartilage
- Spine (C412)
+ Involvement of multiple non-adjacent vertebral segments
+ Spinal canal
- Pelvis (C414)
+ One to four pelvic segments involved WITH extraosseous extension |
| 3 |
Regional lymph node(s) involved only
- 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)
+ All bone sites
* Bone (other than primary site)
* Lung
+ Appendicular (C400-C403, C408-C411, C413, C418-C419)
* Discontinuous tumors in the primary bone site ("skip" metastasis)
* Skin
+ Spine (C412)
* Gross vascular invasion
* Tumor thrombus in great vessels
+ Pelvis (C414)
* Encasement of external iliac vessels
* Gross tumor thrombus in major pelvic vessels
* Sacral neuroforamen
* Sacroiliac joint
- Distant lymph node(s), NOS
- Distant metastasis, NOS
+ Carcinomatosis
+ Distant metastasis WITH or WITHOUT distant lymph node(s) |
| 9 |
Unknown if extension or metastasis |
