Clinical N
This input is used for staging
Notes
**Note 1:** Code only regional nodes and nodes, NOS, in this field. Distant nodes are coded in distant metastasis. **Note 2:** Periaortic, pericaval, superior mesenteric artery, and celiac artery lymph nodes are coded to N2.NAACCR Item
NAACCR #950| Clinical N | Clinical N Display | Description | Registrar Notes |
|---|---|---|---|
| cX | cNX | Regional lymph node(s) 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 | Regional lymph node metastasis including: nodes along the cystic duct common bile duct, common hepatic artery and portal vein | Regional lymph nodes: Cystic duct (node of the neck of the gallbladder) (Calot's node) Hepatic Hepatic artery Hilar (in the hepatoduodenal ligament) Node of the foramen of Winslow (omental) (epiploic) Pancreaticoduodenal Pericholedochal (node around common bile duct) Periduodenal Peripancreatic (near head of pancreas only) Periportal Porta hepatis (portal) (hilar) (in hilus of liver) Portal vein Regional lymph node(s), NOS Lymph nodes, NOS Stated as N1 |
| c2 | cN2 | Not defined by UICC* | Metastasis to periaortic, pericaval, superior mesenteric artery, and/or celiac artery 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) |