CS Lymph Nodes

Notes

**Note 1**: Code only regional nodes and nodes, NOS, in this field. Distant nodes are coded in the field Mets at DX.

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 perirectal fat	N1	Determine Correct Table for AJCC 6 N	RN	RN
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	N1	Determine Correct Table for AJCC 6 N	RN	RN
110	Regional lymph nodes: For rectosigmoid: Paracolic/pericolic Perirectal Rectal For rectum: Perirectal Rectal, NOS	N1	Determine Correct Table for AJCC 6 N	RN	RN
200	Regional lymph node(s): For rectosigmoid: Colic, NOS: Left colic Hemorrhoidal, superior or middle Inferior mesenteric Middle rectal Sigmoidal (sigmoid mesenteric) Superior rectal For rectum: Hemorrhoidal, superior, middle or inferior Inferior mesenteric Internal iliac (hypogastric): Obturator Rectal, superior, middle, or inferior Sacral, NOS: Lateral (laterosacral) Middle (promontorial) (Gerota's node) Presacral Sacral promontory Sigmoidal (sigmoid mesenteric)	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	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 node(s) 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 AJCC6 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.