CS Extension
Notes
**Note 1**: For AJCC TNM staging, retroperitoneal sarcomas are classified as deep tumors. **Note 2**: The assignment of T1 and T2 categories for soft tissue sarcomas is based on tumor size. A physician's statement of the T category may be used to code CS Tumor Size and/or CS Extension if this is the only information in the medical record regarding one or both of these fields. However the two fields are coded independently: for example the record may document size but not extension, other than the physician's statement of the T category. Use codes 350 and 375 as appropriate to code CS Extension based on a statement of T when no other extension information is available.| Code | Description | AJCC 7 T | AJCC 6 T | Summary Stage 1977 T | Summary Stage 2000 T |
|---|---|---|---|---|---|
| 100 | Tumor confined to site of origin | Extension Size | Extension Size | L | L |
| 300 | Localized, NOS | Extension Size | Extension Size | L | L |
| 350 | Stated as T1b or T1 [NOS] with no other information on extension | Extension Size | Extension Size | L | L |
| 375 | Stated as T2b or T2 [NOS] with no other information on extension | Extension Size | Extension Size | L | L |
| 400 | Adjacent connective tissue (See definition of adjacent connective tissue in General Rules) |
Extension Size | Extension Size | RE | RE |
| 600 | Adjacent organs/structures: Adrenal(s) (suprarenal gland(s)) Aorta Ascending colon Bone/cartilage Descending colon Kidney(s) Pancreas Vena cava Vertebra |
Extension Size | Extension Size | RE | RE |
| 800 | Further contiguous extension, including: Extension to colon other than ascending or descending |
Extension Size | Extension Size | D | D |
| 950 | No evidence of primary tumor | T0 | T0 | U | U |
| 999 | Unknown; extension not stated Primary tumor cannot be assessed Not documented in patient record |
TX | TX | U | U |