CS Extension
Notes
**Note 1**: AJCC does not include a Tis or TX category for melanoma of mucosa of head and neck sites. CSExtension 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 310 and 315 for extension involving the mucosa only of adjacent sites. Use higher codes for extension involving 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, 205, 250, 440, or 510. **Note 5**: Use code 440, 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 | NA | NA | IS | IS |
| 100 | OBSOLETE DATA RETAINED V0200 Invasive tumor confined to one of the following subsites: Inferior wall (superior surface of soft palate) One lateral wall Posterior superior wall (vault) |
ERROR: | NA | L | L |
| 105 | Tumor involving mucosa only of one of the following subsites: Inferior wall (superior surface of soft palate) One lateral wall Posterior superior wall (vault) |
T3 | NA | L | L |
| 200 | OBSOLETE DATA RETAINED V0200 Involvement of two or more subsites: Lateral wall extending into eustachian tube/middle ear Posterior, inferior, or lateral wall(s) |
ERROR: | NA | L | L |
| 205 | Tumor involving mucosa only of two or more subsites: Lateral wall extending into Eustachian tube/middle ear Posterior, inferior, or lateral wall(s) |
T3 | NA | L | L |
| 250 | Tumor involving mucosa only of nasopharynx, NOS | T3 | NA | L | L |
| 300 | OBSOLETE DATA RETAINED V0200 Confined to nasopharynx Localized, NOS |
T3 | NA | L | L |
| 305 | Localized, NOS | T3 | NA | L | L |
| 310 | Tumor involving mucosa only: Nasal cavity Oropharynx Soft palate including uvula |
T3 | NA | RE | RE |
| 315 | Tumor involving mucosa only: Hard palate Paranasal sinus |
T3 | NA | D | RE |
| 400 | OBSOLETE DATA RETAINED V0200 Oropharynx Soft palate, |
ERROR: | NA | RE | RE |
| 440 | Stated as T3 with no other information on extension | T3 | NA | L | L |
| 500 | OBSOLETE DATA RETAINED V0200 Nasal cavity |
ERROR: | NA | RE | RE |
| 510 | Involvement of deep soft tissues or musculature of any structure in code 105 or 250 | T4a | NA | L | L |
| 515 | 510 + 310 Involvement of deep soft tissues or musculature of any structure in code 105 or 250 plus involvement of mucosa of any structure in code 310 |
T4a | NA | RE | RE |
| 520 | OBSOLETE DATA CONVERTED V0203 See code 545 510 + 315 (Involvement of deep soft tissues or musculature of any structure in code 105, 205, or 250 + Involvement of mucosa of any structure in code 315) |
ERROR: | ERROR: | ERROR: | ERROR: |
| 530 | Involvement of deep soft tissues or musculature of any structure in code 310 | T4a | NA | RE | RE |
| 535 | Involvement of any structure in codes 105 to 310 WITH tumor described as FIXED |
T4a | NA | RE | RE |
| 540 | Involvement of any structure in codes 105 to 310 WITH parapharyngeal extension |
T4a | NA | RE | RE |
| 545 | (510 - 540) + 315 Involvement of deep soft tissues or musculature of any structure in codes 510 - 540 with involvement of mucosa of any structure in code 315 |
T4a | NA | D | RE |
| 550 | OBSOLETE DATA RETAINED V0200 Any extension coded in 100-500 WITH fixation or tumor Described only as FIXED |
ERROR: | NA | RE | RE |
| 555 | Bony involvement of any structure in code 315 | T4a | NA | D | RE |
| 560 | OBSOLETE DATA RETAINED V0200 Any extension coded in 100-500 WITH parapharyngeal extension |
ERROR: | NA | RE | RE |
| 570 | OBSOLETE DATA RETAINED V0200 Hard palate |
ERROR: | NA | D | RE |
| 580 | Pterygopalatine fossa WITHOUT bone invasion |
T4a | NA | RE | RE |
| 600 | OBSOLETE DATA RETAINED V0200 Bone, including Skull |
ERROR: | NA | RE | RE |
| 610 | Bone excluding base of skull Cartilage, NOS Bone, NOS |
T4a | NA | RE | RE |
| 620 | OBSOLETE DATA RETAINED V0200 Paranasal sinus |
ERROR: | NA | D | RE |
| 630 | (580 or 610) + (315 or 555) Involvement of any structure in code 580 or 610 plus any involvement of structures in code 315 |
T4a | NA | D | RE |
| 650 | OBSOLETE DATA REVIEWED AND CHANGED V0200 In CSv1 extension to the orbit was included in both codes 650 and 700. In addition the instructions for coding invasion of orbital bone were not clear. Codes 650 and 700 should be reviewed for orbital involvement. Involvement of bone of floor of orbit should be coded 760, and other orbit involvement should be coded 790. Orbit |
ERROR: | ERROR: | ERROR: | ERROR: |
| 670 | Hypopharynx Overlying skin Soft tissues of neck |
T4a | NA | D | D |
| 700 | OBSOLETE DATA REVIEWED AND CHANGED V0200 See note in code 650 Brain Cranial nerves Hypopharynx Infratemporal fossa Orbit Intracranial extension, NOS |
ERROR: | ERROR: | ERROR: | ERROR: |
| 710 | OBSOLETE DATA REVIEWED AND CHANGED V0203 Code 710 included in error in CSv2: V0200, V0202 with the tag OBSOLETE DATA RETAINED V0200. Code 710 should not be entered on any case. See note in code 650; see codes 670, 760, 790. Brain Cranial nerves Hypopharynx Infratemporal fossa Orbit Intracranial extension, NOS |
ERROR: | ERROR: | ERROR: | ERROR: |
| 725 | Stated as T4a with no other information on extension | T4a | NA | L | L |
| 750 | OBSOLETE DATA CONVERTED V0200 See code 790 Masticator space |
ERROR: | ERROR: | ERROR: | ERROR: |
| 760 | Skull base including floor of orbit | T4b | NA | RE | RE |
| 765 | 760 + (315, 555) Base of skull including floor of orbit plus any involvement of structures in code 315 or 555 |
T4b | NA | D | RE |
| 770 | 760 + 670 Base of skull including floor or orbit plus any involvement of structures in code 670 |
T4b | NA | D | D |
| 790 | Contiguous extension: Brain Dura Intracranial extension, NOS Lower cranial nerves (IX, X, XI, XII) Masticator space/infratemporal fossa Orbit |
T4b | NA | D | D |
| 800 | OBSOLETE DATA RETAINED V0200 Further contiguous extension Soft tissues of the neck |
ERROR: | NA | D | D |
| 801 | Further contiguous extension: Carotid artery (encased) 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 |