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**: Superior and inferior mesenteric nodes are coded in CS Mets at DX. Mesenteric nodes, NOS are coded in CS Lymph Nodes.

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: Colic, NOS Epicolic (adjacent to bowel wall) Mesocolic, NOS Paracolic/pericolic	N1	Determine Correct Table for AJCC 6 N	RN	RN
200	Cecal: Anterior (prececal) Posterior (retrocecal) Ileocolic Right colic	N1	Determine Correct Table for AJCC 6 N	RN	RN
300	Mesenteric, NOS Regional lymph node(s), NOS	N1	Determine Correct Table for AJCC 6 N	RN	RN
400	Stated as N1 with no other information on regional lymph nodes	N1	N1	RN	RN
450	OBSOLETE DATA RETAINED V0200 Stated as N2 pathologic	ERROR:	N2	RN	RN
800	Lymph nodes, NOS	N1	N1	RN	RN
999	Unknown; regional lymph nodes not stated Regional lymph nodes cannot be assessed Not documented in patient record	NX	NX	U	U

- For CS Lymph Nodes codes 100-300 ONLY: when CS Lymph Nodes Eval is 0, 1, 5, or 9, the N category is assigned from the Lymph Nodes Clinical Evaluation AJCC 6 Table, using Regional Nodes Positive and CS Site-Specific Factor 2; when CS Lymph Nodes Eval is 2, 3, 6, 8, or not coded, the N category is determined from the Lymph Nodes Pathologic Evaluation 6 Table Also Used When CS Reg Nodes Eval is Not Coded using Regional Nodes Positive.