CS Lymph Nodes

Notes

**Note 1**: Code only regional nodes and nodes, NOS in this field. Distant nodes are coded in CS Mets at DX. **Note 2**: Hepatoduodenal nodes are regional for primaries of the lesser curvature of the stomach. They are coded in CS Mets at DX for all other subsites in this schema. **Note 3**: If information about named regional lymph nodes is available, use codes 110, 400, or 420 rather than code 500 or 600.

Code	Description	AJCC 7 N	TNM 6 N	Summary Stage 1977 N	Summary Stage 2000 N
000	No regional lymph node involvement	N0	N0	NONE	NONE
050	Nodule(s) in perigastric fat	N1	Determine Correct Table for AJCC 6 N	RN	RN
100	OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 000, 050, 110, CS Mets at DX codes 10, 50 Regional lymph nodes: Left gastric (superior gastric), NOS: Cardial Cardioesophageal Gastric, left Gastropancreatic, left Lesser curvature Lesser omental Paracardial Pancreaticosplenic (pancreaticolienal) Pancreatoduodenal Perigastric, NOS Peripancreatic Right gastric (inferior gastric), NOS: Gastrocolic Gastroduodenal Gastroepiploic (gastro-omental), right or NOS Gastrohepatic Greater curvature Greater omental Pyloric, NOS Infrapyloric (subpyloric) Suprapyloric Splenic (lienal), NOS: Gastroepiploic (gastro-omental), left Splenic hilar Superior mesenteric Nodule(s) in perigastric fat	N1	Determine Correct Table for AJCC 6 N	RN	RN
110	Regional lymph nodes: Left gastric (superior gastric), NOS: Cardial Cardioesophageal Gastric, left Gastropancreatic, left Lesser curvature Lesser omental Paracardial Pancreaticosplenic (pancreaticolienal) Pancreatoduodenal Perigastric, NOS Peripancreatic Right gastric (inferior gastric), NOS: Gastrocolic Gastroduodenal Gastroepiploic (gastro-omental), right or NOS Gastrohepatic Greater curvature Greater omental Pyloric, NOS Infrapyloric (subpyloric) Suprapyloric Splenic (lienal), NOS: Gastroepiploic (gastro-omental), left Splenic hilar	N1	Determine Correct Table for AJCC 6 N	RN	RN
400	Celiac Hepatic (excluding gastrohepatic, [see code 100] and hepatoduodenal [see code 420])	N1	Determine Correct Table for AJCC 6 N	D	RN
420	For lesser curvature only: Hepatoduodenal	N1	Determine Correct Table for AJCC 6 N	D	D
500	Regional lymph nodes, NOS	N1	Determine Correct Table for AJCC 6 N	RN	RN
600	Stated as N1 with no other information on regional lymph nodes	N1	N1	RN	RN
650	OBSOLETE DATA RETAINED V0200 Stated as N2, NOS	ERROR:	N2	RN	RN
700	OBSOLETE DATA RETAINED V0200 Stated as N3, NOS	ERROR:	N3	RN	RN
800	Lymph nodes, NOS	N1	N1	RN	RN
999	Unknown; regional lymph nodes not stated Regional lymph node(s) cannot be assessed Not documented in patient record	NX	NX	U	U

- For CS Lymph Nodes codes 050-500 and 800 ONLY, when CS Lymph Nodes Eval is 0, 1, 5, or 9, the N category is assigned as shown in the Lymph Nodes Clinical Evaluation Table, using Regional Nodes Positive and CS Site-Specific Factor 1; when CS Lymph Nodes Eval is 2, 3, 6, 8, or not coded, the N category is assigned as shown in the Lymph Nodes Pathologic Evaluation Table Also Used When CS Reg Nodes Eval Is Not Coded using Regional Nodes Positive.