Collaborative Stage

Note 1: For this site, AJCC defines Tis as high-grade dysplasia, which includes "all non-invasive neoplastic epithelium that was previously called carcinoma in situ." Cancers stated to be noninvasive or in situ are classified as Tis. High-grade dysplasia is generally not reportable in cancer registries, but if a registry does collect it, code 000 should be used.
Note 2: Use codes 110, 120, and 160 in preference to code 150 if information about the depth of invasion into the layers of the polyp is available.
Note 3: Ignore intraluminal extension to adjacent segment(s) of esophagus or to more distal parts of stomach and code depth of invasion or extra-gastric spread as indicated.
Note 4: If the diagnosis states linitis plastica and no other information regarding extension is available, use code 350. Linitis plastica is defined as diffuse involvement of the entire stomach wall.
Note 5: Codes 600-700 are used for contiguous extension from the site of origin. Discontinuous involvement is coded in CS Mets at DX, except for implants within the stomach (code 300).

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
000	In situ, intraepithelial, non-invasive; high-grade dysplasia	Tis	Tis	IS	IS
050	(Adeno)carcinoma, noninvasive, in a polyp	Tis	Tis	IS	IS
100	Invasive tumor confined to mucosa, NOS, (including intramucosal, NOS)	T1a	T1	L	L
110	Invades lamina propria	T1a	T1	L	L
120	Invades muscularis mucosae	T1a	T1	L	L
125	Stated as T1a with no other information on extension	T1a	T1	L	L
130	OBSOLETE DATA RETAINED V0200 Cardia/GE Junction (EGJ), and the proximal 5 cm of the fundus and body of the stomach have been moved into this schema from the Stomach schema in CSv2, and the detailed polyp information is not required Confined to head of polyp Extension to stalk	ERROR	T1	L	L
140	OBSOLETE DATA RETAINED V0200 Cardia/EGJ and the proximal 5 cm of the fundus and body of the stomach have been moved into this schema from Stomach schema in CSv2, and detailed polyp information is not required Confined to stalk of polyp	ERROR	T1	L	L
150	Tumor in polyp NOS	T1NOS	T1	L	L
160	Invades submucosa (superficial invasion) Stated as T1b with no other information on extension	T1b	T1	L	L
170	Stated as T1 [NOS] with no other information on extension	T1NOS	T1	L	L
200	Invades into but not through muscularis propria	T2	T2a	L	L
300	Implants inside stomach Localized, NOS	T1NOS	T1	L	L
350	Linitis plastica (and no other information regarding extension available) (See Note 4)	T2	T2a	RE	L
360	Stated as T2 with no other information on extension	T2	T2NOS	L	L
400	Extension through wall, NOS Invasion through muscularis propria or muscularis, NOS Perimuscular tissue invaded Subserosal tissue/(sub)serosal fat invaded	T3	T2b	L	L
420	Adventitia and/or soft tissue invaded Esophagus is described as "FIXED"	T3	T3	RE	RE
430	OBSOLETE DATA CONVERTED V0203 See code 480 Stated as T3 [NOS]	ERROR	ERROR	ERROR	ERROR
450	Extension to adjacent (connective) tissue WITHOUT perforation of visceral peritoneum covering these structures: Gastric artery Ligaments: Gastrocolic Gastrohepatic Gastrosplenic Omentum, NOS Greater Lesser Perigastric fat	T3	T2b	RE	RE
480	Stated as T3 with no other information on extension	T3	T2b	L	RE
500	Invasion of/through serosa (mesothelium) (tunica serosa) (visceral peritoneum), including perforation of visceral peritoneum covering the gastric ligaments or the omentum WITHOUT invasion of adjacent structures	T4a	T3	RE	RE
550	500 + 450	T4a	T3	RE	RE
570	Pericardium Pleura Diaphragm	T4a	T4	RE	RE
580	Stated as T4a with no other information on extension	T4a	T4	RE	RE
600	OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 570, 605, and 615 Diaphragm Duodenum via serosa or NOS Esophagus via serosa Ileum Jejunum Liver Pancreas Small intestine, NOS Spleen Transverse colon (including flexures)	T4a	T4	RE	RE
605	Duodenum via serosa Duodenum, NOS Esophagus via serosa Ileum Jejunum Liver Pancreas Small intestine, NOS Spleen Transverse colon (including flexures)	T4b	T4	RE	RE
610	OBSOLETE DATA REVIEWED V0203 See codes 570 and 615 Pleura Pericardium	T4a	T4	RE	RE
615	605 + 570	T4b	T4	RE	RE
700	Abdominal wall Adrenal gland Kidney Retroperitoneum	T4a	T4	D	D
710	OBSOLETE DATA CONVERTED V0203 See code 810 Stated as T4 [NOS]	ERROR	ERROR	ERROR	ERROR
720	OBSOLETE DATA CONVERTED V0203 See code 580 Stated as T4a [NOS]	ERROR	ERROR	ERROR	ERROR
800	Further contiguous extension including but not limited to: Aorta Vertebral body Trachea Stated as unresectable, NOS	T4b	T4	D	D
805	Stated as T4b with no other information on extension	T4b	T4	D	D
810	Stated as T4 [NOS] with no other information on extension	T4NOS	T4	RE	RE
820	OBSOLETE DATA CONVERTED V0203 See code 805 Stated as T4b [NOS]	ERROR	ERROR	ERROR	ERROR
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

EsophagusGEJunction

CS Extension