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Regional lymph node staging |
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| 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) |
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(Adapted from UICC / AJCC TNM Classification of Malignant Tumors, 6th edition, 2002) | |
Harish World Journal of Surgical Oncology 2005 3:21 doi:10.1186/1477-7819-3-21 |
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