CS Lymph Nodes

Notes

**Note 1**: Code only regional nodes and nodes, NOS in this field. Distant nodes are coded in the CS Mets at DX. **Note 2**: Inferior mesenteric nodes are coded in CS Mets at DX for cecum, ascending colon, transverse colon, and hepatic flexure. Superior mesenteric nodes are coded in CS Mets at DX for all colon sites.

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) or foci in pericolic fat/adjacent mesentery/mesocolic fat	N1	Determine Correct Table for AJCC 6 N	RN	RN
100	OBSOLETE DATA RETAINED AND REVIEWED V0203 Code 100 was defined as "Regional lymph nodes for all colon sites: Colic (NOS), Epicolic (adjacent to bowel wall), Mesocolic (NOS), Paracolic/pericolic, Nodule(s) or foci in pericolic fat/adjacent mesentery/mesocolic fat" in CSv1. Code 100 was defined as "Regional lymph nodes for all colon sites: Colic (NOS), Epicolic (adjacent to bowel wall), Mesocolic (NOS), Paracolic/pericolic" in CSv2:V0201, V0202. All cases should be reviewed and recoded to appropriate codes; see codes 050 and 110. Regional lymph nodes for all colon sites: Colic (NOS) Epicolic (adjacent to bowel wall) Mesocolic (NOS) Paracolic/pericolic	N1	Determine Correct Table for AJCC 6 N	RN	RN
110	Regional lymph nodes for all colon sites: Colic, NOS Epicolic (adjacent to bowel wall) Mesocolic, NOS Paracolic/pericolic	N1	Determine Correct Table for AJCC 6 N	RN	RN
200	OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 210, 220 Regional lymph nodes, for specific subsites: Cecum: Cecal: Anterior (prececal), Posterior (retrocecal) Cecal, NOS Ileocolic Right colic Ascending colon: Ileocolic Middle colic Right colic Transverse colon and flexures: Inferior mesenteric for splenic flexure only Left colic for splenic flexure only Middle colic Right colic for hepatic flexure only Descending colon: Inferior mesenteric Left colic Sigmoid Sigmoid colon: Inferior mesenteric Sigmoidal (sigmoid mesenteric) Superior hemorrhoidal Superior rectal	N1	Determine Correct Table for AJCC 6 N	RN	RN
210	Regional lymph nodes, for specific subsites: Cecum: Cecal: Anterior (prececal), Posterior (retrocecal) Cecal, NOS Ileocolic Right colic Ascending colon: Ileocolic Middle colic Right colic Transverse colon and flexures: Inferior mesenteric for splenic flexure only Left colic for splenic flexure only Middle colic Right colic for hepatic flexure only Descending colon: Inferior mesenteric Left colic Sigmoid colon: Inferior mesenteric Sigmoidal (sigmoid mesenteric) Superior hemorrhoidal Superior rectal	N1	Determine Correct Table for AJCC 6 N	RN	RN
220	Regional lymph nodes for descending colon: Sigmoid	N1	Determine Correct Table for AJCC 6 N	D	RN
300	Regional lymph nodes for all colon sites: Mesenteric, NOS Regional lymph node(s), NOS	N1	Determine Correct Table for AJCC 6 N	RN	RN
400	OBSOLETE DATA RETAINED AND REVIEWED V0203 See code 410 Stated as N1 pathologic	N1	N1	RN	RN
410	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 CSLymph Nodes codes 050-300 ONLY: when CS Lymph Nodes Eval is 0, 1, 5, or 9, the N category for AJCC 6 staging is assigned as shown in the Lymph Nodes Clinical Evaluation AJCC 6 Table, using Regional Nodes Positive and CS Site-Specific Factor 2; when CS Regional Nodes Eval is 2, 3, 6, 8, or not coded, the N category for AJCC 6 staging is assigned as shown in the Lymph Nodes Pathologic Evaluation AJCC 6 Table Also Used When CS Reg Nodes Eval is Not Coded, using Regional Nodes Positive.