CS Extension
Notes
**Note 1**: Involvement of or extension to bone includes any type of tumor extension to the bone, such as erosion, invasion, extension, penetration, or destruction. **Note 2**: Extension to structures in codes 400 and higher may be from one or both ethmoid sinuses. **Note 3**: In code 700, "minimal extension to anterior cranial fossa" implies tumor pushing through cribriform plate, but without invasion of the dura or brain. **Note 4**: Code Base of skull NOS only if no information available to code to more specific bony structures in skull. **Note 5**: Use code 300 for localized tumor only if no information is available to assign codes 100, 120, 160, or 315. **Note 6**: Use code 315 410, 680, 725, 810, or 815 if the physician's assignment of T category is the only information available about the extent of the tumor.Code | Description | AJCC 7 T | AJCC 6 T | Summary Stage 1977 T | Summary Stage 2000 T |
---|---|---|---|---|---|
000 | In situ, intraepithelial, noninvasive | Tis | Tis | IS | IS |
120 | Invasive tumor confined to left or right ethmoid sinus WITHOUT bony involvement |
T1 | T1 | L | L |
140 | OBSOLETE DATA CONVERTED V0200 See code 320 Confined to both ethmoid sinuses without bone involvement |
ERROR: | ERROR: | ERROR: | ERROR: |
160 | Confined to ethmoid sinus, NOS WITHOUT bony involvement |
T1 | T1 | L | L |
220 | Invasive tumor confined to either left or right ethmoid WITH bony invasion (involvement of perpendicular plate of ethmoid bone or ethmoid air cells) |
T1 | T1 | L | L |
240 | OBSOLETE DATA CONVERTED V0200 See code 340 Confined to both ethmoid sinuses WITH bony invasion (involvement of perpendicular plate of ethmoid bone or ethmoid air cells) |
ERROR: | ERROR: | ERROR: | ERROR: |
260 | Confined to ethmoid sinus, NOS WITH bony invasion (involvement of perpendicular plate of ethmoid bone or ethmoid air cells) |
T1 | T1 | L | L |
300 | Localized, NOS | T1 | T1 | L | L |
315 | Stated as T1 with no other information on extension | T1 | T1 | L | L |
320 | Confined to both ethmoid sinuses WITHOUT bony involvement |
T2 | T2 | RE | RE |
340 | Confined to both ethmoid sinuses WITH bony invasion (involvement of perpendicular plate of ethmoid bone or ethmoid air cells) |
T2 | T2 | RE | RE |
400 | Extension to nasal cavity with or without bony invasion (Involvement of perpendicular plate of ethmoid bone or ethmoid air cells): Floor Lateral wall Nasal vestibule Nasal cavity, NOS Septum Turbinates |
T2 | T2 | RE | RE |
410 | Stated as T2 with no other information on extension | T2 | T2 | RE | RE |
620 | Base of skull, NOS | T3 | T3 | RE | RE |
630 | Cribriform plate | T3 | T3 | RE | RE |
640 | Medial wall or floor of orbit Orbital plate |
T3 | T3 | RE | RE |
650 | Maxillary sinus | T3 | T3 | RE | RE |
660 | Hard palate | T3 | T3 | D | D |
680 | Stated as T3 with no other information on extension | T3 | T3 | RE | RE |
700 | Anterior orbital contents Skin of nose Skin of cheek Anterior cranial fossa (minimal extension) (see Note 3) Pterygoid plates Sphenoid sinus Frontal sinus |
T4a | T4a | RE | RE |
720 | 700 + 660 Any structure in code 700 plus hard palate |
T4a | T4a | D | D |
725 | Stated as T4a with no other information on extension | T4a | T4a | RE | RE |
760 | Orbital apex Dura Brain Middle cranial fossa Cranial nerves (other than V2, maxillary division of trigeminal nerve) Nasopharynx Clivus |
T4b | T4b | RE | RE |
780 | 760 + 660 Any structure in code 760 plus palate |
T4b | T4b | D | D |
800 | Further contiguous extension | T4b | T4b | D | D |
810 | Stated as T4b with no other information on extension | T4b | T4b | D | D |
815 | Stated as T4 [NOS] with no other information on extension | T4NOS | T4NOS | RE | RE |
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 |