Collaborative Stage Data Set - Revised 05/13/2011 FINAL
| Code | Description | TNM 7 Map | TNM 6 Map | SS77 Map | SS2000 Map |
| 000 | No regional lymph node involvement | NA | N0 | NONE | NONE |
| 100 | Regional lymph nodes: Cervical Submandibular (submaxillary) Parotid, NOS: Infra-auricular Preauricular Regional lymph node(s), NOS | NA | N1 | RN | RN |
| 800 | Lymph nodes, NOS | NA | N1 | RN | RN |
| 999 | Unknown; regional lymph nodes not stated Regional lymph nodes cannot be assessed Not documented in patient record | NA | NX | U | U |