CS Extension

This input is used for staging

Notes

**Note 1**: The intrinsic muscles of tongue are four paired muscles within the tongue which control its shape. The extrinsic muscles originate from structures outside the tongue and control its positioning. **Note 2**: AJCC does not include a Tis or TX 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 3**: AJCC does not include a T1 or T2 category for mucosal melanoma of head and neck sites. **Note 4**: Use codes 410 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 5**: Use code 305 for localized tumor only if no information is available to assign code 110, 405, 440, or 520. **Note 6**: Use code 440, 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 on one side confined to:
Lamina propria
Submucosa
ERROR: NA L L
105 OBSOLETE DATA REVIEWED V0203
See codes 110, 405

Tumor confined to mucosa of anterior tongue:
Tumor confined to one side
Midline tumor
Tumor crosses midline
T3 NA L L
110 Tumor involving mucosa only of anterior tongue:
Confined to one side
Midline tumor
T3 NA L L
200 OBSOLETE DATA RETAINED V0200

Musculature, intrinsic or NOS
ERROR: NA L L
300 OBSOLETE DATA RETAINED V0200

Localized, NOS
Midline tumor
ERROR: NA L L
305 Localized, NOS T3 NA L L
310 OBSOLETE DATA CONVERTED V0203
See code 110

Midline tumor confined to mucosa
ERROR: ERROR: ERROR: ERROR:
400 OBSOLETE DATA RETAINED V0200

Tumor crosses midline
ERROR: NA L L
405 Extension involving mucosa only across midline of tongue T3 NA L L
410 Extension involving mucosa only:
Base of tongue
Floor of mouth
Gingiva, lower
Retromolar trigone
T3 NA RE RE
420 Extension involving mucosa only:
Lateral pharyngeal wall
Soft palate, inferior surface
Tonsillar pillars and fossae
Tonsils
T3 NA D RE
440 Stated as T3 with no other information on extension T3 NA L L
500 OBSOLETE DATA RETAINED V0200

Base of tongue
Floor of mouth
Gingiva, lower
Retromolar trigone
ERROR: NA RE RE
520 Involvement of deep soft tissue or musculature of tongue
Soft tissue, NOS
T4a NA L L
530 Sublingual gland T4a NA RE RE
540 520 + 500

Involvement of deep soft tissue or musculature of tongue plus mucosal involvement of any structure in code 410
T4a NA RE RE
550 Involvement of deep soft tissue or musculature of any structure in code 410 T4a NA RE RE
560 (520 - 550) + 420

Involvement of any structure in codes 520 - 550 plus mucosal involvement of any structure in code 420
T4a NA D RE
570 Involvement of deep soft tissue or musculature of any structure in code 420 T4a NA D RE
600 OBSOLETE DATA RETAINED V0200

Lateral pharyngeal wall
Soft palate, inferior surface
Tonsillar pillars and fossae
Tonsils
ERROR: NA D RE
700 Cartilage of mandible
Cortical bone of mandible
Mandible, NOS
Cartilage, NOS
Cortical bone, NOS
Bone, NOS excluding maxilla and base of skull base
T4a NA RE D
710 700 + (560 or 570)

Involvement of any structure in code 700 plus any structure in code 560 or 570
T4a NA D D
720 OBSOLETE DATA RETAINED V0200

(600) + (700)
ERROR: NA D D
740 OBSOLETE DATA CONVERTED V0200
See code 770

Maxilla
Maxillary sinus
ERROR: ERROR: ERROR: ERROR:
750 Musculature of tongue, extrinsic:
Genioglossus
Geniohyoid
Hyoglossus
Mylohyoid
Palatoglossus
Styloglossus
T4a NA D D
760 Skin of face T4a NA D D
770 Cartilage of maxilla
Cortical bone of maxilla
Maxilla, NOS
Maxillary sinus (antrum)
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
ERROR: 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