CS Extension
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 420 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 or 550. **Note 5**: Use code 550, 775, 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 | NA | NA | IS | IS |
100 | OBSOLETE DATA RETAINED V0200 Invasive tumor confined to: Lamina propria Submucosa |
ERROR: | NA | L | L |
105 | Tumor confined to buccal mucosa | T3 | NA | L | L |
200 | OBSOLETE DATA CONVERTED V0200 See code 610 Musculature (buccinator) |
ERROR: | ERROR: | ERROR: | ERROR: |
300 | Localized, NOS | T3 | NA | L | L |
400 | Extension involving mucosa only: Lateral pharyngeal wall Lip(s) including commissure Gingiva Tonsillar pillars and fossae Tonsils |
T3 | NA | RE | RE |
420 | Extension involving mucosa only: Hard palate Soft palate |
T3 | NA | D | D |
500 | OBSOLETE DATA RETAINED V0200 Lip(s) including commissure |
ERROR: | NA | RE | RE |
510 | OBSOLETE DATA RETAINED V0200 Gingiva |
ERROR: | NA | RE | RE |
550 | Stated as T3 with no other information on extension | T3 | NA | L | L |
600 | OBSOLETE DATA RETAINED V0200 Lateral pharyngeal wall Tonsillar pillars and fossae Tonsils |
ERROR: | NA | L | L |
610 | Involvement of deep soft tissue or musculature of cheek (buccinators) Soft tissue, NOS |
T4a | NA | RE | L |
615 | 610 + 400 Involvement of deep soft tissue or musculature of cheek plus mucosal involvement of any structure in code 400 |
T4a | NA | RE | RE |
620 | Involvement of deep soft tissue or musculature of any structure in code 400 | T4a | NA | RE | RE |
650 | Subcutaneous soft tissue of cheek | T4a | NA | RE | RE |
660 | Skin of check WITH or WITHOUT ulceration | T4a | NA | RE | RE |
665 | (610 - 660) + 420 Involvement of any structure in codes 610 - 660 plus mucosal involvement of any structure in code 420 |
T4a | NA | D | D |
670 | OBSOLETE DATA CONVERTED V0200 See code 700 Maxillary sinus |
ERROR: | ERROR: | ERROR: | ERROR: |
690 | Deep soft tissue involvement: Nasal cavity Soft palate Palatine bone |
T4a | NA | D | D |
700 | Cartilage: Mandible Maxilla Cortical bone: Mandible Maxilla Mandible, NOS Maxilla, NOS Maxillary sinus (antrum) Cartilage, NOS Cortical bone, NOS Bone, NOS excluding palatine bone, base of skull |
T4a | NA | D | D |
730 | OBSOLETE DATA CONVERTED V0200 See code 790 Skull |
ERROR: | ERROR: | ERROR: | ERROR: |
750 | Deep extrinsic muscle of tongue: Genioglossus Hyoglossus Palatoglossus Styloglossus |
T4a | 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: Hard palate Soft palate |
ERROR: | NA | D | D |
801 | Further contiguous extension: 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 |