Collaborative Stage

Collaborative Stage for TNM 7 - Revised 09/29/2009 [ Schema ]

CS Lymph Nodes

Note 1: Code only regional nodes and nodes, NOS, in this field. Distant nodes are coded in the field Mets at DX.
Note 2: The number of positive regional nodes is required to calculate the correct N category for this site. Codes 400 and 450 are for use when this number is not available, but the pathology report assigns an N1 or N2 category. If information about the number of positive nodes is available, use codes 100, 200, or 300 rather than codes 400 or 450. The actual number of involved nodes will be coded in Reg LN Pos.

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
000	No regional lymph node involvement	N0	N0	NONE	NONE
100	Regional lymph node(s): Duodenum: Duodenal Gastroduodenal Hepatic Infrapyloric (subpyloric) Pancreaticoduodenal Pyloric Jejunum or ileum: Superior mesenteric Mesenteric, NOS Leum Cecal (anterior, posterior or retrocecal)	^	N1	RN	RN
200	Regional lymph node(s) for duodenum primaries only: Pericholodochal (common bile duct) Superior mesenteric (See code 11 in CS Mets at DX for other lymph nodes of small intestine)	^	N1	D	RN
300	Regional lymph node(s), NOS	^	N1	RN	RN
400	Stated as N1, NOS pathologic	N1	N1	RN	RN
450	Stated as N2, NOS pathologic	N2	N1	RN	RN
800	Lymph nodes, NOS	^	N1	RN	RN
999	Unknown; not stated Regional lymph nodes cannot be assessed Not documented in patient record	NX	NX	U	U

^ For codes 100-300 and 800 ONLY: when CS Lymph Nodes Eval is 0, 1, 5, or 9, the N category is assigned from the Lymph Nodes Clinical Evaluation 7th Table, using Reg LN Pos 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 7th Table Also Used When CS Reg Nodes Eval is Not Coded using Reg LN Pos.