CS Lymph Nodes

Notes

**Note 1**: Code only regional nodes and nodes, NOS in this field. Distant nodes are coded in CS Mets at DX. **Note 2**: Pericholedochal nodes are coded in CS Mets at DX for jejunum and ileum primaries. **Note 3**: The number of positive regional nodes is required to calculate the correct N category for this site. If information about the number of positive nodes is available, use code 100, 200, or 300. Use code 400 or 450 when the record identifies an N1 or N2 category but the specific information about the number of nodes involved is not available.
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
100 Regional lymph node(s):
For duodenum primaries only:
Duodenal
Gastroduodenal
Hepatic
Pancreaticoduodenal
Pyloric:
Infrapyloric (subpyloric)
For jejunum or ileum primaries only:
Mesenteric, NOS:
Superior mesenteric
For ileum primary only:
Cecal (anterior, posterior or retrocecal)
Ileocecal
Determine Correct Table for AJCC 7 N N1 RN RN
200 Regional lymph node(s):
For duodenum primaries only:
Pericholodochal (common bile duct)
Superior mesenteric
Determine Correct Table for AJCC 7 N N1 D RN
300 Regional lymph node(s), NOS Determine Correct Table for AJCC 7 N N1 RN RN
400 Stated as N1 pathologic with no other information on regional lymph nodes N1 N1 RN RN
450 Stated as N2 pathologic with no other information on regional lymph nodes N2 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
- For CS Lymph Nodes codes 100-300 ONLY, when CS Lymph Nodes Eval is 1 or 9 and CS Coding System Original is before CS v02.05, the N category is assigned from the Lymph Nodes Clinical Eval Prior to V02.05 7th Table using Regional Nodes Positive and CS Site-Specific Factor 2. When CS Lymph Nodes Eval = 0, 5, OR (CS Lymph Nodes Eval is 1,9 and CS Coding System Original is at least V02.05), the N category is assigned from Lymph Nodes Clinical Eval V02.05 AJCC 7 Table using CS Site-Specific Factor 2. When CS Lymph Nodes Eval is 2, 3, 6, 8, or not coded, the N category for AJCC 7 staging is assigned as shown in the Lymph Nodes Pathologic Evaluation AJCC 7 Table Also Used When CS Lymph Nodes Eval is Not Coded using Regional Nodes Positive.