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 400-450 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, 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

999

NAACCR 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 upper 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:
Inner cheek (buccal mucosa)
Commissure
Opposite lip (both lips)
T3 NA RE RE
410 Extension involving mucosa only:
Upper gingiva
Gingiva, NOS
T3 NA RE RE
440 Extension involving mucosa only:
Lower gingiva
T3 NA D RE
450 Extension involving mucosa only:
Floor of mouth
Tongue
T3 NA D D
470 Stated as T3 with no other information on extension T3 NA L L
500 OBSOLETE DATA RETAINED V0200

Buccal mucosa (inner cheek)
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 upper lip
Soft tissue NOS
T4a NA L L
530 520 + (400 or 410)

Involvement of deep soft tissue or musculature of upper 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 upper gingiva T4a NA RE RE
700 Cartilage of maxilla
Cortical bone of maxilla
Maxilla, NOS
Cartilage NOS
Cortical bone, NOS
Bone, NOS except base of skull
T4a NA RE RE
705 (520 -700) + 440

Involvement of any structure in codes 520 - 700 plus mucosa of lower gingiva
T4a NA D RE
710 Deep tissue or periosteum of lower gingiva T4a NA D RE
740 Skin of nose T4a NA RE D
743 740 + (440 or 710)

Skin of nose plus mucosa or deep tissue lower gingiva
T4a NA D D
745 (520 - 740) + 450

Involvement of any structure in codes 520 - 740 plus mucosa of floor of mouth or tongue
T4a NA D D
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 Cartilage of mandible
Cortical bone of mandible
Mandible, NOS
T4a NA D D
770 OBSOLETE DATA RETAINED V0200

Cartilage of mandible
Cortical bone of mandible
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:
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