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**: If information about named regional lymph nodes is available, use codes 110, 400, or 420 rather than code 600. **Note 3**: Hepatoduodenal nodes are regional for primaries of the lesser curvature of the stomach. They are coded in CS Mets at DX for all other subsites in this schema. **Note 4**: Nodal metastasis is very rare in gastrointestinal stromal tumors and surgeons generally agree that nodal dissection is not indicated. In the absence of information on regional lymph node status, N0 is appropriate; code 999 is mapped to N0 accordingly.
Code Description AJCC 7 N TNM 6 N Summary Stage 1977 N Summary Stage 2000 N
000 No regional lymph node involvement N0 NA NONE NONE
050 Nodule(s) in perigastric fat N1 NA RN RN
100 OBSOLETE DATA RETAINED AND REVIEWED V0203
See codes 000, 050, and 110 and CS Mets at DX codes 10 and 50

Regional lymph nodes:
Left gastric (superior gastric), NOS:
Cardial
Cardioesophageal
Gastric, left
Gastropancreatic, left
Lesser curvature
Lesser omental
Paracardial
Pancreaticosplenic (pancreaticolienal)
Pancreatoduodenal
Perigastric, NOS
Peripancreatic
Right gastric (inferior gastric), NOS:
Gastrocolic
Gastroduodenal
Gastroepiploic (gastro-omental), right or NOS
Gastrohepatic
Greater curvature
Greater omental
Pyloric, NOS
Infrapyloric (subpyloric)
Suprapyloric
Splenic (lienal), NOS:
Gastroepiploic (gastro-omental), left
Splenic hilar
Superior mesenteric
Nodule(s) in perigastric fat
N1 NA RN RN
110 Regional lymph nodes:
Left gastric (superior gastric), NOS:
Cardial
Cardioesophageal
Gastric, left
Gastropancreatic, left
Lesser curvature
Lesser omental
Paracardial
Pancreaticosplenic (pancreaticolienal)
Pancreatoduodenal
Perigastric, NOS
Peripancreatic
Right gastric (inferior gastric), NOS:
Gastrocolic
Gastroduodenal
Gastroepiploic (gastro-omental), right or NOS
Gastrohepatic
Greater curvature
Greater omental
Pyloric, NOS
Infrapyloric (subpyloric)
Suprapyloric
Splenic (lienal), NOS:
Gastroepiploic (gastro-omental), left
Splenic hilar
N1 NA RN RN
400 Hepatic (excluding gastrohepatic, [see code 100] and hepatoduodenal [see code 420]) N1 NA D RN
420 For lesser curvature:
Hepatoduodenal
N1 NA D D
500 Regional lymph node(s), NOS N1 NA RN RN
600 Stated as N1 with no other information on regional lymph node N1 NA RN RN
650 OBSOLETE DATA RETAINED V0200

Stated as N2, NOS
ERROR: NA RN RN
700 OBSOLETE DATA RETAINED V0200

Stated as N3, NOS
ERROR: NA RN RN
800 Lymph nodes, NOS N1 NA RN RN
999 Unknown; regional lymph nodes not stated
Regional lymph node(s) cannot be assessed
Not documented in patient record
N0 NA U U