Collaborative Stage

Collaborative Stage for TNM 7 - Revised 11/09/2010 [ Schema ]

CS Lymph Nodes

Note 1: Code only regional nodes and nodes, NOS, in this field. Distant nodes are coded in CS Mets at DX.
Note 2: In-transit metastasis is defined as a tumor distinct from the primary lesion and located either between the primary lesion and the draining regional lymph nodes or distal to the primary lesion. In-transit metastasis is coded in CS Lymph Nodes.
Note 3: Isolated tumor cells (ITCs) should be considered positive nodes. If only ITCs are present, code 010.

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
000	No regional lymph node involvement	N0	N0	NONE	NONE
010	Isolated tumor cells (ITCs) only	N1a	N0	NONE	NONE
100	Regional lymph nodes: Iliac, NOS: External Internal (hypogastric), NOS: Obturator Inguinal, NOS: Deep inguinal, NOS: Node of Cloquet or Rosenmuller (highest deep inguinal) Superficial inguinal (femoral) Regional lymph node(s), NOS	^	N1	RN	RN
320	Stated as N1a with no other information on regional lymph nodes	^	N1	RN	RN
340	Stated as N1b with no other information on regional lymph nodes	^	N1	RN	RN
360	Stated as N1 [NOS] with no other information on regional lymph nodes	^	N1	RN	RN
400	In-transit metastasis WITHOUT regional lymph node involvement or involvement of regional lymph nodes not stated (See Note 2)	N2	N1	RN	RN
420	400 + 100 In-transit metastasis WITH regional lymph nodes listed in code 100 (See Note 2)	N2	N1	RN	RN
800	Lymph nodes, NOS	N1NOS	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 100-360 ONLY,the N category for AJCC 7 staging is assigned based on the value of CS Site-Specific Factor 3, Clinical Status of Lymph Node Mets, as shown in the Lymph Nodes and Clinical Status AJCC 7 Table.