Clinical N

This input is used for staging

Notes

**Note:** Code only regional nodes and nodes, NOS, in this field. Distant nodes are coded in M (distant metastasis). **Regional lymph nodes** Anterior to the ampulla of Vater Inferior to the ampulla of Vater Posterior to the ampulla of Vater Superior to the ampulla of Vater Celiac Hepatic Hepatic artery Infrapyloric (subpyloric) Lateral aortic (lumbar) Node of the foramen of Winslow (epiploic)(omental) Pancreaticoduodenal Peripancreatic (EXCEPT nodes at tail of pancreas) Periportal (portal vein) Proximal mesenteric Retroperitoneal Superior mesenteric

NAACCR 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	No regional lymph node involvement
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)