CS Extension
Notes
**Note**: Involvement of or extension to bone includes any type of tumor extension to the bone, such as erosion, invasion, extension, penetration, or destruction.| Code | Description | AJCC 7 T | AJCC 6 T | Summary Stage 1977 T | Summary Stage 2000 T |
|---|---|---|---|---|---|
| 000 | In situ, intraepithelial, noninvasive | NA | NA | IS | IS |
| 100 | Invasive tumor confined to mucosa of one of the following: Frontal sinus Sphenoid sinus |
NA | NA | L | L |
| 300 | Localized, NOS | NA | NA | L | L |
| 400 | More than one accessory sinus invaded Destruction of bony wall of sinus |
NA | NA | RE | RE |
| 500 | Hard palate Nasal cavity: Floor Lateral wall Nasal cavity, NOS Septum Turbinates |
NA | NA | RE | RE |
| 600 | Bone: Facial bones Maxilla Orbital structures Pterygoid fossa Zygoma |
NA | NA | RE | RE |
| 700 | Brain Cranial nerves Muscles: Masseter Pterygoid Nasopharynx Orbital contents, including eye Soft tissue Skin |
NA | NA | RE | RE |
| 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 |