Collaborative Stage

Note 1: Code only regional nodes and nodes, NOS, in this field. Note 2 specifies when to code tumor deposits (TD) here. Distant nodes are coded in CS Mets at DX.
Note 2: One or more malignant satellite peritumoral nodules in the pericolorectal adipose tissue of a primary carcinoma without histologic evidence of residual lymph node in the nodule(s) may represent discontinuous spread, venous invasion with extravascular spread, or a totally replaced lymph node. If the primary tumor is localized and maps to T1 or T2 and this is the only information on lymph nodes, use code 050. The total number of TD must always be coded in CS Site-Specific Factor 4. If there are TD and node involvement, code only the information on node involvement in this field; use a higher code number than 050.
Note 3: Rectal nodes, NOS are coded 100. Middle or superior rectal nodes are coded 200 for both rectosigmoidal and rectal primaries. Inferior rectal nodes are coded 200 for rectal primaries. Inferior rectal nodes are coded in CS Mets at DX for rectosigmoidal primaries.
Note 4: . Middle or superior hemorrhoidal nodes are coded 200 for both rectosigmoidal and rectal primaries. Inferior hemorrhoidal nodes are coded 200 for rectal primaries. Inferior hemorrhoidal nodes are coded in CS Mets at DX for rectosigmoidal primaries.
Note 5: Mesenteric nodes, NOS are coded 300. Inferior mesenteric or sigmoid mesenteric nodes are coded 200. Superior mesenteric nodes are coded in CS Mets at DX.
Note 6: CS does not collect information on otherwise negative lymph nodes containing isolated tumor cells (ITCs) for this schema. CS does not derive ITC status for this schema. Count otherwise negative regional nodes containing ITCs as negative nodes.
Note 7: The number of positive regional nodes is required to calculate the correct N category for this schema. Use codes 400-470 when the pathology report assigns an N1 or N2 category but does not specify the number of nodes involved, or the record identifies an N1 or N2 category but the specific information about number of nodes involved is not available. Use codes 100-300 rather than codes 400-470 when information about the number of positive nodes is available, or when nodes are clinically positive but not removed for examination.

^ For codes 110-300 ONLY: when CS Lymph Nodes Eval is 0, 1, 5, or 9, the N category is assigned from the Lymph Nodes Clinical Evaluation AJCC 7 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 AJCC 7 Table Also Used When CS Reg Nodes Eval is Not Coded using Regional Nodes Positive.
* For CS Lymph codes 110- 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 AJCC 6 Table Also Used When CS Reg Nodes Eval is Not Coded using Regional Nodes Positive.

Code	Description	TNM 7 Mapping	TNM 6 Mapping	SS77 Map	SS2000 Map
000	No regional lymph node involvement and no tumor deposits (TD)	N0	N0	NONE	NONE
050	TD in the subserosa, mesentery, or nonperitonealized pericolic or perirectal tissues WITHOUT regional nodal metastasis Stated as N1c with information that regional lymph nodes are not involved	N1c	N1	RE	RE
100	OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 050, 110 Regional lymph nodes: Rectosigmoid: Paracolic/pericolic Perirectal Rectal Nodule(s) or foci in pericolic fat/adjacent mesentery/mesocolic fat Rectum: Perirectal Rectal, NOS Nodule(s) or foci in perirectal fat	^	*	RN	RN
110	Regional lymph nodes: All sites: Perirectal Rectal, NOS Rectosigmoid: Paracolic/pericolic	^	*	RN	RN
200	Regional lymph nodes for rectosigmoid and rectum: Hemorrhoidal, middle Hemorrhoidal, superior Inferior mesenteric Rectal, middle Rectal, superior Sigmoidal (sigmoid mesenteric) Regional lymph nodes for rectosigmoid: Colic, NOS Left colic Regional lymph nodes for rectum: Hemorrhoidal, inferior Internal iliac (hypogastric), NOS Obturator Rectal, inferior Sacral, NOS Lateral (laterosacral) Middle (promontorial) (Gerota's node) Presacral Sacral promontory	^	*	RN	RN
300	Mesenteric, NOS Regional lymph node(s), NOS	^	*	RN	RN
400	OBSOLETE DATA CONVERTED V0203 See code 430 Stated as pathologic N1	ERROR	ERROR	ERROR	ERROR
410	Stated as pathologic N1a with no other information on regional lymph nodes	N1a	N1	RN	RN
420	Stated as pathologic N1b with no other information on regional lymph nodes	N1b	N1	RN	RN
430	Stated as pathologic N1 [NOS] with no other pathologic information on regional lymph nodes	N1NOS	N1	RN	RN
450	OBSOLETE DATA CONVERTED V0203 See code 480 Stated as pathologic N2	ERROR	ERROR	ERROR	ERROR
460	Stated as pathologic N2a with no other information on regional lymph nodes	N2a	N2	RN	RN
470	Stated as pathologic N2b with no other information on regional lymph nodes	N2b	N2	RN	RN
480	Stated as pathologic N2 [NOS] with no other pathologic information on regional lymph nodes	N2NOS	N2	RN	RN
800	Lymph nodes, NOS	N1NOS	N2	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

Rectum

CS Lymph Nodes