Clinical N

This input is used for staging


**Note 1:** Code only regional nodes and nodes, NOS, in this field. Distant nodes are coded in M (distant metastasis). **Note 2:** UICC only has a N2, while AJCC has N2a, N2b, and N2c. If a record comes in with N2a, N2b, or N2c, reassign it to N2. N2 and the subcategories of N2 all stage the same way. **Note 3:** Size of the largest metastasis in a lymph node must be known to assign N. You may use a physician’s statement of the N category if this is the only information in the medical record. * If the size of the metastasis is not documented, determine the size of the largest involved lymph node as documented clinically * If the size of the lymph node(s) cannot be determined, assign N1 * Do not code the size of any node(s) assigned in M (distant metastasis) **Regional lymph nodes** Iliac, NOS External Internal (hypogastric), NOS Obturator Inguinal, NOS Deep inguinal, NOS Node of Cloquet or Rosenmuller (highest deep inguinal) Superficial inguinal (femoral) Regional lymph node, NOS Lymph nodes, NOS


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 Metastasis in a single lymph node, 3 cm or less in greatest dimension IPSILATERAL positive regional lymph node(s), not stated if single or multiple

Positive lymph nodes, not stated if ipsilateral, contralateral or bilateral

Stated as N1
c2 cN2 Metastasis in a single lymph node, more than 3 cm but not more than 6 cm in greatest dimension, or in multiple lymph nodes, none more than 6 cm in greatest dimension* Multiple ipsilateral lymph nodes, NOS
Bilateral or contralateral lymph nodes, NOS

Stated as N2 (N2a, N2b, N2c, N2 [NOS])
c3 cN3 Metastasis in a lymph node, more than 6 cm in greatest dimension Stated as N3
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)
\* For this schema, UICC has only the N2 subcategory. AJCC has subcategories N2a, N2b, or N2c.