CS Extension

This input is used for staging

Notes

**Note 1**: Involvement of or extension to bone ncludes any type of tumor extension to the bone, such as erosion, invasion, extension, penetration, or destruction. **Note 2**: Use code 300 for localized tumor only if no information is available to assign code 100. **Note 3**: Code Base of skull, NOS only if no information available to code to more specific bony structures in skull. **Note 4**: Use code 665, 685, 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 Tis Tis IS IS
100 Invasive tumor confined to mucosa of maxillary sinus (antrum)
WITHOUT erosion or destruction of bone

Stated as T1 with no other information on extension
T1 T1 L L
300 Localized, NOS T1 T1 L L
400 Tumor causing bone erosion or destruction
EXCLUDING extension to:
Posterior wall of maxillary sinus (see code 600)
Pterygoid plates (see code 680)
INCLUDING:
Palatine bone, hard palate
Middle nasal meatus
Nasal cavity (floor, lateral wall, septum, turbinates)

Stated as T2 with no other information on extension
T2 T2 RE RE
600 Ethmoid sinus, anterior
Floor or medial wall of orbit
Floor or posterior wall of maxillary sinus
Maxilla, NOS
Subcutaneous tissues
T3 T3 RE RE
650 OBSOLETE DATA CONVERTED V0200
See code 600

Bone of the posterior wall of maxillary sinus
Invasion of maxilla, NOS
ERROR: ERROR: ERROR: ERROR:
660 Ethmoid sinus, posterior
Ethmoid sinus, NOS
Pterygoid fossa
T3 T3 RE RE
665 Stated as T3 with no other information on extension T3 T3 RE RE
675 Base of skull, NOS T4a T4a RE RE
680 Anterior orbital contents
Skin of cheek
Pterygoid plates
Infratemporal fossa
Cribriform plate
Sphenoid sinus
Frontal sinus
T4a T4a RE RE
685 Stated as T4a with no other information on extension T4a T4a RE RE
700 OBSOLETE DATA REVIEWED AND CHANGED V0203
Recode involved structures to code 675, 680, or 710 as appropriate

Base of skull
Orbital contents including eye
Pterygomaxillary or temporal fossa
Soft palate
ERROR: ERROR: ERROR: ERROR:
710 Pterygomaxillary fossa
Temporal fossa
Soft palate
T4b T4b RE RE
750 Further contiguous extension including:
Brain
Clivus
Cranial nerves (other than V2, maxillary division of trigeminal nerve)
Dura
Middle cranial fossa
Nasopharynx
Orbital apex
T4b T4b RE RE
800 Further contiguous extension T4b T4b D D
810 Stated as T4b with no other information on extension T4b T4b RE RE
815 Stated as T4 [NOS] with no other information on extension T4NOS T4NOS RE RE
950 No evidence of primary tumor T0 T0 U U
999 Unknown; extension not stated
Primary tumor cannot be assessed
Not documented in patient record
TX TX U U