CS Extension
| Code | Description | AJCC 7 T | AJCC 6 T | Summary Stage 1977 T | Summary Stage 2000 T |
|---|---|---|---|---|---|
| 050 | Benign or borderline tumor of other parts of the central nervous system (CNS) | NA | NA | NA | NA |
| 100 | Tumor confined to tissue or site of origin | NA | NA | L | L |
| 300 | Localized, NOS | NA | NA | L | L |
| 400 | Meningeal tumor infiltrates nerve Nerve tumor infiltrates meninges (dura) |
NA | NA | RNOS | RNOS |
| 500 | Adjacent connective/soft tissue Adjacent muscle |
NA | NA | RNOS | RNOS |
| 600 | Brain for cranial nerve tumors Major blood vessel(s) Sphenoid and frontal sinuses (skull) |
NA | NA | RNOS | RNOS |
| 700 | Brain except for cranial nerve tumors Bone other than skull Eye |
NA | NA | D | D |
| 800 | Further contiguous extension | NA | NA | D | D |
| 950 | No evidence of primary tumor | NA | NA | U | U |
| 999 | Unknown; extension not stated Primary tumor cannot be assessed Not documented in patient record |
NA | NA | U | U |