Collaborative Stage

Note 1: Code only regional nodes and nodes, NOS, in this field. Distant nodes are coded in CS Mets at DX.
Note 2: Regional nodes include bilateral and contralateral involvement of named nodes.
Note 3: Determine the size of the largest metastasis in a lymph node as documented in the pathology report to assign codes 100-300, not the size of the lymph node itself. If the size of the metastasis is not documented, determine the size of the largest involved lymph node as documented pathologically or clinically with pathology taking priority. Do not code the size of any node(s) coded in CS Mets at DX.
Note 4: The assignment of the N category is based both on number and size of metastasis. Use codes as described here if the number and/or size of nodes involved is unknown:
    Code 110: Single node involved, size not stated.
    Code 210: Multiple nodes involved, size not stated.
    Code 200: Single or multiple nodes not stated, size stated and greater than 2 cm but less than or equal to 5 cm.
    Code 300: Single or multiple nodes not stated, size stated and greater than 5 cm.
    Code 505: Single or multiple nodes not stated, size not stated.

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
000	No regional lymph node involvement	N0	N0	NONE	NONE
100	SINGLE regional lymph node, less than or equal to 2 cm: Iliac, NOS: Common External Internal (hypogastric), NOS: Obturator Inguinal, NOS: Deep inguinal, NOS Node of Cloquet or Rosenmuller (highest deep inguinal) Superficial (femoral) Pelvic, NOS Sacral, NOS Presacral Regional lymph node, NOS Stated as N1 with no other information on regional lymph nodes	N1	N1	RN	RN
110	SINGLE regional node listed in code 100, size not stated	N1	N1	RN	RN
200	SINGLE regional lymph node listed in code 100, greater than 2 cm but less than or equal to 5 cm OR MULTIPLE regional nodes listed in code 100, none greater than 5 cm	N2	N2	RN	RN
210	MULTIPLE regional nodes listed in code 100, size not stated	N2	N2	RN	RN
300	Regional lymph node(s) listed in code 100, at least one greater than 5 cm	N2	N2	RN	RN
400	Stated as N2 with no other information on regional lymph nodes	N2	N2	RN	RN
500	OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 110, 200, 210, 300, and 505 Regional lymph node(s), NOS (size and/or number not stated)	N1	N1	RN	RN
505	Regional lymph node(s), NOS: Size and/or number not stated (See Note 4 for exceptions)	N1	N1	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

CS Lymph Nodes