Pathologic N

This input is used for staging

Notes

**Note 1:** Histological examination of a regional lymphadenectomy specimen will ordinarily include 3 or more lymph nodes. If the regional lymph nodes are negative, but the number ordinarily examined is not met, classify as pN0. (1) **Note 2:** 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 #890
Pathologic N Pathologic N Display Description Registrar Notes
pX pNX Regional lymph node(s) cannot be assessed Pathologic classification criteria met, evaluation done:
Physician unable to assess N
Surgical resection primary tumor, no regional lymph nodes removed
Involvement of regional lymph nodes not documented
Physician assigns pNX, no other information available to determine N
p0 pN0 No regional lymph node metastasis
p1 pN1 Regional lymph node metastasis Regional lymph nodes, NOS
Lymph nodes, NOS

Stated as N1
c0 cN0 Clinically: No regional lymph node metastasis Use only for TNM defined pTis cases where there is a resection of the primary and the nodes are not evaluated pathologically
88 88 Not applicable Primary site/histology not TNM defined
Death certificate only (DCO) case
<BLANK> BLANK See Registrar Notes Pathologic classification criteria not met
No surgical resection of primary tumor and there isn’t a positive biopsy of a structure in the highest T category and highest N category
Evidence of metastatic disease (pM1), no other workup
Only Pathologic Stage Group documented (no T, N, or M information available)
(1) International Union Against Cancer (UICC) *TNM Classification of Malignant Tumors,* 7th ed., Sobin, LH, Gospodarowicz, M, Wittekind, CH, eds. New York: Wiley, 2009, pg., 116