Nx | Regional lymph nodes cannot be assessed |
---|---|
N0 | No regional lymph node metastasis |
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 but less than 6 cm in greatest dimension |
N2b | Metastasis in a multiple ipsilateral lymph nodes, none more than 6 cm in greatest dimension |
N2c | Metastasis in bilateral or contralateral lymph nodes, none more than 6 cm in greatest dimension |
N3 | Metastasis in a lymph node more than 6 cm in greatest dimension (Midline nodes are considered ipsilateral nodes) |