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** **Primary tumor in either left or right liver** Hilar Common bile duct Cystic duct Hepatic, NOS Hepatic artery Hepatic pedicle Hepatoduodenal ligament Portal vein: Porta hepatis Periportal Inferior phrenic nodes **Primary tumor in left liver (segments 2-4) or lobe of liver not stated** Gastrohepatic **Primary tumor in right liver (segments 5-8) or lobe of liver not stated** Periduodenal Peripancreatic **Primary tumor involving both lobes of liver** Gastrohepatic Periduodenal Peripancreatic

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	Regional lymph nodes, NOS Lymph nodes, NOS Stated as N1
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)