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 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 code 410 for extension involving the mucosa only of adjacent sites. Use higher codes for extension involving 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, 405, or 470. **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 on one side confined to mucoperiosteum (stroma) |
ERROR: | NA | L | L |
| 105 | Tumor confined to mucosa of hard palate on one side | T3 | NA | L | L |
| 300 | Localized, NOS | T3 | NA | L | L |
| 400 | OBSOLETE DATA RETAINED V0200 Tumor crosses midline |
ERROR: | NA | L | L |
| 405 | Tumor confined to mucosa of hard palate and crossing midline | T3 | NA | L | L |
| 410 | Extension involving mucosa only: Buccal mucosa (inner cheek) Gingiva, upper Glossopalatine arch Pharyngopalatine arch Soft palate Uvula |
T3 | NA | RE | RE |
| 470 | Stated as T3 with no other information on extension | T3 | NA | L | L |
| 500 | OBSOLETE DATA RETAINED V0200 Buccal mucosa (inner cheek) Gingiva, upper Glossopalatine arch Pharyngopalatine arch Soft palate Uvula |
ERROR: | NA | RE | RE |
| 510 | Involvement of deep tissue or periosteum of hard palate | T4a | NA | L | L |
| 520 | 510 + 410 Involvement of deep tissue hard palate plus mucosal involvement of any structure in code 410 |
T4a | NA | RE | RE |
| 530 | Involvement of deep soft tissue or musculature of any structure in code 410 | T4a | NA | RE | RE |
| 700 | Cartilage of maxilla or palatine bone Cortical bone of maxilla or palatine bone Maxilla, NOS Palatine bone, NOS Cartilage, NOS Cortical bone, NOS Bone, NOS except base of skull |
T4a | NA | RE | RE |
| 730 | Floor of nose Maxillary sinus (antrum) Nasal cavity Nasopharynx Skin of face Pterygoid plate |
T4a | NA | D | D |
| 740 | OBSOLETE DATA RETAINED V0200 Deep muscle of tongue Floor of nose Maxillary antrum (sinus) Nasal cavity Nasopharynx Skin of face Sphenoid bone |
ERROR: | NA | D | D |
| 750 | Extrinsic muscle of tongue: Genioglossus Hyoglossus Palatoglossus Pharyngoglossus Styloglossus |
ERROR: | ERROR: | ERROR: | ERROR: |
| 760 | OBSOLETE DATA CONVERTED V0200 See code 730 Pterygoid plate |
ERROR: | ERROR: | ERROR: | ERROR: |
| 775 | Stated as T4a with no other information on extension | T4a | NA | L | L |
| 800 | Contiguous extension: Base of skull base (including sphenoid bone other than pterygoid plates) Carotid artery (encased) Masticator space |
T4b | 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 |