Collaborative Stage

Collaborative Stage for TNM 7 - Revised 10/23/2009 [ Schema ]

GumOther

CS Extension

Note 1: Superficial erosion alone of bone/tooth socket by gingival primary is not sufficient to code as bone involvement (code 70).
Note 2: Periosteum is a fibrous membrane that wraps the outer surface of bones. Mucoperiosteum is a compound structure of mucous membrane and periosteum. Cortical bone is the dense compact outer layer of bone. Trabecular, cancellous, or spongy bone (spongiosa) is a porous network of tissue filling the interior of bone, decreasing weight and allowing room for blood vessels and marrow.
Note 3: AJCC assigns T value based on size for involvement of cortical bone. Involvement through cortical bone is required for assignment of T4a.
Note 4: Use code 300 for localized tumor ONLY if no information is available to assign code 100, 405, 410, or 415.
Note 5: Use code 405, 410, 415, 775, 810 or 815 if the physician's assignment of T category is the ONLY information available about the extent of the tumor.

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
000	In situ; noninvasive; intraepithelial	Tis	Tis	IS	IS
100	Invasive tumor confined to lamina propria (mucoperiosteum) (stroma)	^	*	L	L
300	Localized, NOS	^	*	L	L
405	Stated as T1 with no other information on extension	^	*	L	L
410	Stated as T2 with no other information on extension	^	*	L	L
415	Stated as T3 with no other information on extension	^	*	L	L
500	Buccal mucosa (inner cheek) Labial mucosa (inner lip), lip Tongue (mucosa)	^	*	RE	RE
535	Cortical bone of mandible or maxilla Mandible, NOS Maxilla, NOS Bone, NOS	^	*	RE	RE
550	Facial muscle, NOS Subcutaneous soft tissue of face	^	*	RE	RE
600	Lateral pharyngeal wall Tonsillar pillars and fossae Tonsils	^	*	RE	RE
650	Hard palate including cortical palatine bone Soft palate including uvula	^	*	RE	RE
720	Deep (extrinsic) muscle of tongue: Genioglossus Hyoglossus Palatoglossus Styloglossus	T4a	T4a	RE	RE
725	Trabecular bone of mandible or maxilla Trabecular palatine bone	T4a	T4a	RE	RE
760	Skin of face	T4a	T4a	D	D
770	Maxillary sinus (antrum)_	T4a	T4a	D	D
775	Stated as T4a with no other information on extension	T4a	T4a	RE	RE
788	Specified bone (other than maxilla, mandible, palatine, or bones in codes 795 and 805)	T4b	T4b	D	D
790	OBSOLETE DATA CONVERTED V0200 See code 805 Skull	ERROR	ERROR	ERROR	ERROR
795	Masticator space Pterygoid plates	T4b	T4b	D	D
800	OBSOLETE DATA RETAINED V0200 Further contiguous extension, including: Masticator space Pterygoid Plates Skull base Encases internal carotid artery	ERROR	T4b	D	D
805	Further contiguous extension including: Skull Skull base Internal carotid artery (encased)	T4b	T4b	D	D
810	Stated as T4b with no other information on extension	T4b	T4b	D	D
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 Primary tumor cannot be assessed Not documented in patient record	TX	TX	U	U

^ For codes 100 through 650 ONLY, the T category for AJCC 7th Edition staging is assigned based on the value of CS Tumor Size as shown in the Extension Size Table for this site.
* For codes 100 through 650 ONLY, the T category for AJCC 6th Edition staging is assigned based on the value of CS Tumor Size, as shown in the Extension Size Table for this site.