Table 4.
AJCC N staging system (7th edition) and the ND staging system
| Stage | AJCC N staging system (7th edition) | Modified N staging system |
|---|---|---|
| N0 | No regional lymph node metastasis | No regional lymph node metastasis |
| Nx | Regional lymph nodes cannot be assessed | Regional lymph nodes cannot be assessed |
| N1 | Metastasis in a single inguinal lymph node | Metastasis in a single inguinal lymph node or LND<7.0% |
| N2 | Metastasis in multiple or bilateral inguinal lymph nodes | Metastasis in multiple or bilateral inguinal lymph nodes or LND=7.0-16.9% |
| N3 | Unilateral or bilateral ENE of LNM or pelvic lymph node(s) | Unilateral or bilateral ENE of LNM or pelvic lymph node(s) or LND ≥17% |
ENE: extranodal extension, LNM: lymph node metastasis, LND=lymph node density