SalivaryGlandOther - CS Extension

Note 1: AJCC considers "in situ carcinoma of salivary gland" an impossible diagnosis. Any case so coded will be mapped to an unknown AJCC stage, in situ Summary Stage.
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.
Note 3: The assignment of T1 and T2 categories for tumors of major salivary glands without exparenchymal extension is based on tumor size. A physician's statement of the T category may be used to code CS Tumor Size and/or CS Extension if this is the only information in the medical record regarding one or both of these fields. However the two fields are coded independently: for example the record may document size but not extension, other than the physician's statement of the T category. Use codes 305, 310, 408, 625, 810, or 815 as appropriate to code CS Extension based on a statement of T when no other extension information is available.
Note 4: Use code 300 for localized tumor only if no information is available to assign codes 100 or 305.

^For CS Extension codes 100-350 ONLY, the T category for AJCC 7 staging is assigned based on value of CS Tumor Size as shown in the Extension Size Table for this schema.
*For CS Extension codes 100-350 ONLY, the T category for AJCC 6 staging is assigned based on value of CS Tumor Size as shown in the Extension Size Table for this schema.

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
000	In situ, intraepithelial, noninvasive	TX	TX	IS	IS
100	Invasive tumor confined to gland/duct of origin	^	*	L	L
300	Localized, NOS	^	*	L	L
305	Stated as T1 with no other information on extension	^	*	L	L
310	Stated as T2 with no other information on extension	^	*	L	L
350	Microscopic extraparenchymal extension ONLY to periglandular soft/connective tissue	^	*	RE	RE
400	Macroscopic extraparenchymal extension to: Periglandular soft/connective tissue Another major salivary gland (parotid, submandibular) Skeletal muscle: Digastric Pterygoid Stylohyoid	T3	T3	RE	RE
402	Maxillary artery Facial artery or vein	T3	T3	RE	RE
405	Spinal accessory nerve	T3	T3	D	D
408	Stated as T3 with no other information on extension	T3	T3	RE	RE
450	Periosteum of mandible	T4a	T4a	RE	RE
505	OBSOLETE DATA CONVERTED V0203 See code 515 (450 or 510) + 405 (Any structure in code 450 or 510 + Spinal accessory nerve)	ERROR	ERROR	ERROR	ERROR
510	Mandible Nerves: Facial (7th) Lingual	T4a	T4a	RE	RE
515	(450 or 510) + 402	T4a	T4a	RE	RE
518	(450 or 510) + 405	T4a	T4a	D	D
600	Skin	T4a	T4a	D	D
620	External auditory meatus	T4a	T4a	D	D
623	(600 or 620) + 402	T4a	T4a	D	D
625	Stated as T4a with no other information on extension	T4a	T4a	RE	RE
650	OBSOLETE DATA REVIEWED AND CHANGED V0203 Recode involved structures to code 402, 515, 623, 655, or 660 as appropriate Blood vessel(s): Carotid artery Facial artery or vein Maxillary artery	ERROR	ERROR	ERROR	ERROR
655	Carotid artery (encased)	T4b	T4b	RE	RE
660	655 + (405, 600, or 620) Carotid artery plus any structures in code 405, 600, or 620	T4b	T4b	D	D
710	Base of skull Skull, NOS	T4b	T4b	D	D
720	OBSOLETE DATA CONVERTED V0200 See code 405 Spinal accessory nerve	ERROR	ERROR	ERROR	ERROR
790	Pterygoid plates	T4b	T4b	D	D
800	Further contiguous extension	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 not stated Primary tumor cannot be assessed Not documented in patient record	TX	TX	U	U