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 M (distant metastasis). **Note 2:** Pericholedochal (common bile duct) lymph nodes are coded in N (regional lymph nodes) for primaries of the duodenum. They are coded in M (distant metastasis) for primaries of other small intestine subsites. **Note 3:** Regional lymph node involvement is rare for GISTs, so that cases in which the nodal status is not associated clinically are classified as cN0 instead of cNX. **Regional lymph nodes** **Duodenum primaries (C170)** Duodenal Gastroduodenal Hepatic Pancreaticoduodenal Pericholodochal (common bile duct) Pyloric: infrapyloric, subpyloric Superior mesenteric **Jejunum primaries (C171)** Mesenteric, NOS Superior mesenteric **Ileum primaries (C172)** Cecal (anterior, posterior, retrocecal) Ileocecal Mesenteric, NOS Superior mesentericNAACCR Item
NAACCR #950| 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 | Regional lymph node metastasis | Regional lymph nodes, NOS Lymph nodes, NOS Stated as N1 |
| 88 | 88 | Not applicable | In situ case but no pTis is defined by TNM 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) |