TABLE 90-2
| Table 90-2. Clinical Tumor Staging Characteristics for Regional Lymph Nodes and Distant Metastases | |
| Regional Lymph Nodes (N) | |
Nx |
Regional lymph nodes cannot be assessed |
N0 |
No regional lymph node metastases |
N1 |
Metastasis in a single ipsilateral lymph node, 3 cm or less in greatest dimension |
N2a |
Metastasis in a single ipsilateral lymph node, more than 3 cm, bu not more than 6 cm in greatest dimension |
N2b |
Metastasis in multiple ipsilateral lymph nodes, none greater than 6 cm in greatest dimension |
N2c |
Metastasis in bilateral or contralateral lymph nodes, none greater than 6 cm in greatest dimension |
N3 |
Metastasis in a lymph node greater than 6 cm in greatest dimension |
Distant Metastases (M) |
|
Mx |
Presence of distant metastasis cannot be assessed |
M0 |
No distant metastasis |
M1 |
Distant metastasis |