CS Extension
This input is used for staging
Notes
**Note 1**: AJCC does not include a Tis or TX category for melanoma of mucosa of head and neck sites. CS Extension codes of 000 and 999 are mapped to NA and AJCC stage group is derived as NA. **Note 2**: AJCC does not include a T1 or T2 category for mucosal melanoma of head and neck sites. **Note 3**: Use codes 400 and 410 for extension involving the mucosa only of adjacent sites. Use higher codes for extension involvling the deeper tissues of the primary or adjacent sites. **Note 4**: Use code 300 for localized tumor only if no information is available to assign code 105, 470, or 520. **Note 5**: Use code 470, 775, 810, or 815 if the physician's assignment of T category is the only information available about the extent of the tumor.Default
999NAACCR Item
NAACCR #2810| 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 | OBSOLETE DATA RETAINED V0200 Invasive tumor confined to: Labial mucosa (inner lip) Lamina propria Multiple foci Submucosa (superficial invasion) Vermilion surface Superficial extension to: Skin of lip Subcutaneous soft tissue of lip |
ERROR: | NA | L | L |
| 105 | Tumor confined to mucosa of lip: Labial mucosa (inner lip) Vermilion surface |
T3 | NA | L | L |
| 200 | OBSOLETE DATA CONVERTED V0200 See code 520 Musculature |
ERROR: | ERROR: | ERROR: | ERROR: |
| 300 | Localized, NOS | T3 | NA | L | L |
| 400 | Extension involving mucosa only: Buccal mucosa (Inner cheek) Commissure Opposite lip (both lips) |
T3 | NA | RE | RE |
| 410 | Extension involving mucosa only: Lower gingiva Gingiva, NOS |
T3 | NA | RE | RE |
| 470 | Stated as T3 with no other information on extension | T3 | NA | L | L |
| 500 | OBSOLETE DATA RETAINED V0200 Inner cheek (buccal mucosa) Commissure Opposite (both) lip(s) |
ERROR: | NA | RE | RE |
| 510 | OBSOLETE DATA RETAINED V0200 Gingiva |
ERROR: | NA | RE | RE |
| 520 | Involvement of deep soft tissue or musculature of lip Soft tissue, NOS |
T4a | NA | L | L |
| 530 | 520 + (400 or 410) Involvement of deep soft tissue or musculature of lip plus mucosal involvement of any structure in code 400 or 410 |
T4a | NA | RE | RE |
| 540 | Involvement of deep soft tissue or musculature of any structure in code 400 | T4a | NA | RE | RE |
| 550 | Involvement of deep tissue or periosteum of gingiva | T4a | NA | RE | RE |
| 700 | Cartilage of mandible or maxilla Cortical bone of mandible or maxilla Mandible, NOS Maxilla, NOS Cartilage, NOS Cortical bone, NOS Bone, NOS except base of skull |
T4a | NA | RE | RE |
| 748 | Involvement of deep tissue or musculature of floor of mouth or tongue Inferior alveolar nerve |
T4a | NA | D | D |
| 750 | OBSOLETE DATA RETAINED V0200 Tongue |
ERROR: | NA | D | D |
| 755 | Extrinsic muscle of tongue: Genioglossus Hyoglossus Palatoglossus Styloglossus |
T4a | NA | D | D |
| 760 | Skin of face/neck | T4a | NA | D | D |
| 765 | OBSOLETE DATA CONVERTED V0203 See code 700 Cartilage NOS Cortical bone NOS Bone NOS excluding skull base |
ERROR: | ERROR: | ERROR: | ERROR: |
| 770 | OBSOLETE DATA RETAINED V0200 Cortical bone Floor of mouth Inferior alveolar nerve |
ERROR: | NA | D | D |
| 775 | Stated as T4a with no other information on extension | T4a | NA | L | L |
| 790 | Contiguous extension: Base of skull Carotid artery (encased) Masticator space Pterygoid plates |
T4b | NA | D | D |
| 800 | OBSOLETE DATA RETAINED V0200 Further contiguous extension |
ERROR: | NA | D | D |
| 801 | Further contiguous extension including: Brain Dura Lower cranial nerves (IX, X, XI, XII) Mediastinal structures Prevertebral space |
T4b | NA | D | D |
| 810 | Stated as T4b with no other information on extension | T4b | NA | D | D |
| 815 | Stated as T4 [NOS] with no other information on extension | T4NOS | NA | L | L |
| 950 | OBSOLETE DATA RETAINED V0200 No evidence of primary tumor |
ERROR: | NA | U | U |
| 999 | Unknown; extension not stated Primary tumor cannot be assessed Not documented in patient record |
NA | NA | U | U |