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 code 450 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, 460, or 510. **Note 5**: Use code 460,775, 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, intrapeithelial, noninvasive | NA | NA | IS | IS |
| 100 | OBSOLETE DATA RETAINED V0200 Invasive tumor on one side confined to: Lamina propria Submucosa |
ERROR: | NA | L | L |
| 105 | Tumor confined to mucosa of floor of mouth | 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 floor of mouth crossing midline | T3 | NA | L | L |
| 450 | Extension involving mucosa only: Anterior two-thirds of tongue Base of tongue Epiglottis GIngiva (alveolar ridge), lower Glossoepiglottic fold Glossopharyngeal sulcus Lateral pharyngeal wall Pharyngeal (lingual) surface Pharyngoepiglottic fold Tonsillar pillars and fossae Tonsils Vallecula |
T3 | NA | RE | RE |
| 460 | Stated as T3 with no other information on extension | T3 | NA | L | L |
| 500 | OBSOLETE DATA RETAINED V0200 Anterior 2/3 of tongue Base of tongue Gingiva (alveolar ridge), lower |
ERROR: | NA | RE | RE |
| 510 | Involvement of deep soft tissue or musculature of floor of mouth Soft tissue, NOS |
T4a | NA | L | L |
| 520 | 510 + 450 Involvement of deep soft tissue or musculature of floor of mouth plus mucosal involvement of structures in code 450 |
T4a | NA | RE | RE |
| 530 | Sublingual gland, including ducts Submandibular (submaxillary) glands, including ducts |
T4a | NA | RE | RE |
| 600 | OBSOLETE DATA RETAINED V0200 Epiglottis Glossoepiglottic fold Glossopharyngeal sulcus Lateral pharyngeal wall Pharyngeal (lingual) surface Pharyngoepiglottic fold Tonsillar pillars and fossae Tonsils Vallecula |
ERROR: | NA | RE | RE |
| 620 | Extension to deep extrinsic muscle of tongue: Genioglossus Geniohyoid Hyoglossus Mylohyoid Palatoglossus Styloglossus |
T4a | NA | L | L |
| 625 | 620 + 450 Involvement of any structure in code 620 with mucosal involvement of any structure in code 450 |
T4a | NA | RE | RE |
| 628 | 620 + 530 Involvement of any structure in code 620 with involvement of any structure in code 530 |
T4a | NA | RE | RE |
| 630 | OBSOLETE DATA RETAINED V0200 (620) + any of (500, 530, or 600) |
ERROR: | NA | RE | RE |
| 635 | Involvement of deep soft tissue or musculature of any structure in code 450 | T4a | NA | RE | RE |
| 640 | OBSOLETE DATA CONVERTED V0200 See code 740 Subcutaneous soft tissue of chin/neck |
ERROR: | ERROR: | ERROR: | ERROR: |
| 700 | Cortical bone: Mandible Maxilla Cartilage: Mandible Maxilla Mandible, NOS Maxilla, NOS Cartilage, NOS Cortical bone, NOS Bone, NOS excluding base of skull |
T4a | NA | RE | RE |
| 740 | Subcutaneous soft tissue of chin/neck | T4a | NA | RE | RE |
| 760 | Skin of undersurface of chin/neck | T4a | NA | RE | RE |
| 770 | OBSOLETE DATA CONVERTED V0200 See code 700 Further contiguous extension: Maxillary sinus |
ERROR: | ERROR: | ERROR: | ERROR: |
| 775 | Stated as T4a with no other information on extension | T4a | NA | L | L |
| 800 | Contiguous extension: Base of skull Carotid artery (encased) Masticator space Pterygoid plates |
T4b | 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 |