Pathologic N
This input is used for staging
Notes
**Note 1:** Histological examination of a regional lymphadenectomy specimen will ordinarily include 12 or more lymph nodes. If the 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 for appendix** Celiac Anterior (prececal) Ileocolic Posterior (retrocecal) Right colic Colic, NOS Epicolic (adjacent to bowel wall) Mesenteric, NOS Mesocolic, NOS Paracolic/pericolicNAACCR Item
NAACCR #890Pathologic N | Pathologic N Display | Description | Registrar Notes |
---|---|---|---|
pX | pNX | Regional lymph nodes 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 | In situ case but no pTis is defined by TNM 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) |