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 the appropriate N category based on the number of positive nodes. **Regional lymph nodes for small intestine** **All small intestine sites** Regional lymph nodes, NOS Lymph nodes, NOS **Duodenum primaries only (C170)** Duodenal Gastroduodenal Hepatic Pancreaticoduodenal Pericholodochal (common bile duct) Pyloric: infrapyloric, subpyloric Superior mesenteric **Jejunum primaries only (C171)** Mesenteric, NOS: Superior mesenteric **Ileum primaries only (C172)** Cecal (anterior, posterior, retrocecal) Ileocecal Mesenteric, NOS Superior mesenteric


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 1-3 regional lymph nodes Stated as N1
c2 cN2 Metastasis in 4 or more regional lymph nodes Stated as N2
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)