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** Intrathoracic Internal mammary Peridiaphragmatic Scalene Supraclavicular nodes

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 Metastasis in ipsilateral bronchopulmonary and/or hilar lymph node(s) Regional lymph nodes, ipsilateral, intrapulmonary:
Hilar:
Bronchopulmonary
Proximal lobar
Pulmonary root
Intrapulmonary:
Interlobar
Lobar
Segmental
Subsegmental
Peri/parabronchial

Regional lymph nodes, NOS

Lymph nodes, NOS

Stated as N1
c2 cN2 Metastasis in subcarinal lymph node(s) and/or ipsilateral internal mammary or mediastinal lymph node(s) Regional lymph nodes, ipsilateral, mediastinal:
Aortic (above diaphragm), NOS:
Aorto-pulmonary window
Ascending aorta
Peri/para-aortic
Phrenic
Subaortic
Carinal:
Tracheobronchial
Tracheal bifurcation
Internal mammary (parasternal)
Mediastinal, NOS:
Anterior
Posterior (tracheoesophageal)
Pericardial
Peri/paraesophageal (below carina)
Peri/paratracheal, NOS:
Lower peritracheal (azygos)
Upper paratracheal
Pretracheal and retrotracheal, NOS:
Precarinal
Prevascular
Pulmonary ligament
Subcardial
Subcarinal

Regional lymph nodes, ipsilateral, mediastinal:
Peridiaphragmatic

Stated as N2
c3 cN3 Metastasis in contralateral mediastinal, internal mammary, or hilar node(s) and/or ipsilateral or contralateral supraclavicular or scalene lymph node(s) 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)