Collaborative Stage for TNM 7 - Revised 09/06/2009 [ Schema ]
| Code | Description | TNM 7 Map | TNM 6 Map | SS77 Map | SS2000 Map |
| 000 | None; no regional lymph node involvement | N0 | N0 | NONE | NONE |
| 100 | Regional lymph nodes Cervical NOS Submandibular (submaxillary) Parotid, NOS: Infra-auricular Preauricular Regional lymph node(s), NOS Stated as N1 with no other information | N1 | N1 | RN | RN |
| 800 | Lymph nodes, NOS | N1 | N1 | RN | RN |
| 999 | Unknown; not stated Regional lymph nodes cannot be assessed Not documented in patient record | NX | NX | U | U |