CS Lymph Nodes

Notes

**Note 1**: Code only regional nodes and nodes, NOS, in this field. Distant nodes are coded in the field CS Mets at DX. **Note 2**: For periesophageal nodes from the celiac axis area up to the cervical area that are not listed in 100 or 400, code as periesophageal, NOS (450). For a descriptive list of these nodal groups, see Part I Section 2 or Figure 10.3 from the AJCC Cancer Staging Atlas, 2nd Ed. or errata for AJCC 7th Ed. chapter 10. Lymph node stations/groups from this chapter are included in parentheses when applicable. **Note 3**: If information about named regional lymph nodes is available, use codes 100, 400, 450 or 500, rather than codes 610, 660, or 710.

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
100	Regional lymph nodes: Left gastric (superior gastric), NOS: Cardiac Cardioesophageal Gastric, left (17) Gastropancreatic, left Lesser curvature Lesser omental Pericardial (16) 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 Nodule(s) in perigastric fat	Determine Correct Table for AJCC 7 N	Determine Correct Table for AJCC 6 N	RN	RN
400	Celiac (20) Hepatic (excluding gastrohepatic, [see code 100] and hepatoduodenal [see code 420 which is obsolete in CSv2])	Determine Correct Table for AJCC 7 N	Determine Correct Table for AJCC 6 N	D	RN
420	OBSOLETE DATA RETAINED V0200 since cardia/EGJ, and the proximal 5 cm of the fundus and body of the stomach have been moved from the Stomach schema in CSv2 For lesser curvature only: Hepatoduodenal	ERROR:	Determine Correct Table for AJCC 6 N	D	D
450	Paraesophageal, NOS Periesophageal, NOS, including: Anterior mediastinal (6) Aortopulmonary (5) Diaphragmatic (15) Paraesophageal, lower (8l) Paraesophageal, middle (8m) Paratracheal, lower (4L, 4R) Paratracheal, upper (2L, 2R) Posterior mediastinal (3p) Pulmonary ligament (9) Subcarinal (tracheal carina) (7) Supraclavicular (1) Tracheobronchial (hilar) (10L, 10R) (See Note 2)	Determine Correct Table for AJCC 7 N	Determine Correct Table for AJCC 6 N	D	D
500	Regional lymph node(s), NOS	Determine Correct Table for AJCC 7 N	Determine Correct Table for AJCC 6 N	RN	RN
600	OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 500 and 610 and CS Site-Specific Factor 1 code 100 Stated as NI [NOS]	N1	N1	RN	RN
610	Stated as pathologic N1 with no other information on regional lymph nodes	N1	N1	RN	RN
650	OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 500 and 660 and CS Site-Specific Factor 1 code 200 Stated as N2 [NOS]	N2	N2	RN	RN
660	Stated as pathologic N2 with no other information on regional lymph nodes	N2	N1	RN	RN
700	OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 500 and 710 and CS Site-Specific Factor 1 code 300 Stated as N3 [NOS]	N3	N3	RN	RN
710	Stated as pathologic N3 with no other information on regional lymph nodes	N3	N2	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 100-400, 450, and 500 ONLY, when CS Lymph Nodes Eval is 1, 9 and CS Coding System Original is before CS V02.05, the N category is assigned from the Lymph Nodes Clinical Eval Prior to V02.05 AJCC 7 Table, using Regional Nodes Positive and CS Site-Specific Factor 1; when CS Lymph Nodes Eval is 0, 5 OR (CS Lymph Nodes Eval is 1, 9 and CS Coding System Original is at least V02.05), the N category is assigned from Lymph Nodes Clinical Eval V02.05 AJCC 7 Table, using CS Site-Specific Factor 1; when CS Lymph Nodes Eval is 2, 3, 6, 8, or not coded, the N category is determined from the Lymph Nodes Pathologic Evaluation 7th Table Also Used When CS Reg Nodes Eval is Not Coded, using Regional Nodes Positive. - For CS Lymph Nodes codes 100-500 ONLY, when CS Lymph Nodes Eval is 1 or 9, the N category is assigned from the Lymph Nodes Clinical Evaluation 1 or 9 AJCC 6 Table, using Regional Nodes Positive and CS Site-Specific Factor 1; when CS Lymph Nodes Eval is 0 or 5, the N category is assigned from the Lymph Nodes Clinical Evaluation 0 or 5 AJCC 6 Table, using CS Site-Specific Factor 1; when CS Lymph Nodes Eval is 2, 3, 6, 8, or not coded, the N category is determined from the Lymph Nodes Pathologic Evaluation 6th Table Also Used When CS Reg Nodes Eval is Not Coded, using Regional Nodes Positive.