Clinical N

This input is used for staging


**Note 1:** Code only regional nodes and nodes, NOS, in this field. Distant nodes are coded in M (distant metastasis). **Note 2:** Assign N1 if regional lymph nodes are involved but there is no indication of the number of nodes involved. **Note 3:** Assign as regional node metastases when there are metastatic nodules in the fat adjacent to a gastric carcinoma WITHOUT evidence of residual lymph node tissue; assign as M (distant metastases) for nodules implanted on peritoneal surfaces. **Regional lymph nodes** Celiac Hepatic Hepatoduodenal (for lesser curvature) Left gastric (superior gastric), NOS Cardial Cardioesophageal Gastric, left Gastropancreatic, left Lesser curvature Lesser omental Paracardial Nodule(s) in perigastric fat Pancreaticosplenic (pancreaticolienal) Pancreaticoduodenal 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 Regional lymph nodes, NOS Lymph nodes, NOS


Clinical N Clinical N Display Description Registrar Notes
cX cNX Regional lymph nodes cannot be assessed Clinical classification criteria met, evaluation done:
Physician unable to assess N
Regional lymph node involvement cannot be determined or findings inconclusive
Physician assigns cNX, no other information available to determine N
c0 cN0 No regional lymph node metastasis
c1 cN1 Metastasis in 1-2 regional lymph nodei Stated as N1
c2 cN2 Metastasis in 3-6 regional lymph nodes Stated as N2
c3 cN3 Metastasis in 7 or more regional lymph nodes Note: N3 has subcategories of N3a and N3b. Assign N3 only when there is no information available to assign one of the subcategories

Stated as N3 [NOS]
c3A cN3a Metastasis in 7-15 regional lymph nodes Stated as N3a
c3B cN3b Metastasis in 16 or more regional lymph nodes Stated as N3b
88 88 Not applicable Primary site/histology not TNM defined
Death certificate only (DCO) case
<BLANK> BLANK See Registrar Notes Clinical classification criteria not met
Clinical classification criteria met, evaluation done:
No information about diagnostic workup
Results not documented in record
Tumor first detected on surgical resection (no clinical workup)
Evidence of metastatic disease [(cM1) or (pM1)], no other workup
Only Clinical Stage Group documented (no T, N, or M information available)