Collaborative Stage Data Set - Revised 08/07/2013 FINAL
| Code | Description | TNM 7 Map | TNM 6 Map | SS77 Map | SS2000 Map |
| 000 | No regional lymph node involvement | N0 | N0 | NONE | NONE |
| 100 | SINGLE regional lymph node: Superficial inguinal (femoral) regional lymph node Inguinal node, NOS (unknown if superficial or deep) Stated as N1 with no other information on regional lymph nodes | ^ | N1 | RN | RN |
| 200 | MULTIPLE or BILATERAL regional lymph nodes: Superficial inguinal (femoral) regional lymph nodes Inguinal nodes, NOS (unknown if superficial or deep) Stated as N2 with no other information on regional lymph nodes | ^ | N2 | RN | RN |
| 250 | Regional lymph nodes, not stated if single or multiple or bilateral: Superficial inguinal (femoral) regional lymph nodes Inguinal nodes, NOS (unknown if superficial or deep) | ^ | N1 | RN | RN |
| 260 | SINGLE regional lymph nodes, NOS Not stated if inguinal or pelvic | ^ | N1 | RN | RN |
| 270 | MULTIPLE or BILATERAL regional lymph nodes, NOS: Not stated if inguinal or pelvic | ^ | N2 | RN | RN |
| 300 | OBSOLETE DATA RETAINED V0200 Deep inguinal node(s) reclassified in AJCC 7th Edition, see codes 310 and 350 Regional lymph node: Deep inguinal, NOS: Node of Cloquet or Rosenmuller (highest deep inguinal) | ERROR | N3 | RN | RN |
| 310 | SINGLE regional node: Deep inguinal, NOS: Node of Cloquet or Rosenmuller (highest deep inguinal) | ^ | N3 | RN | RN |
| 350 | MULTIPLE or BILATERAL regional nodes: Deep inguinal, NOS: Node of Cloquet or Rosenmuller (highest deep inguinal) | ^ | N3 | RN | RN |
| 370 | OBSOLETE DATA REVIEWED V0203 See codes 250 and 380 Inguinal nodes, NOS (unknown if single, multiple, unilateral or bilateral) | ^ | N1 | RN | RN |
| 380 | Regional lymph nodes, not stated if single, multiple or bilateral: Deep inguinal, NOS: Node of Cloquet or Rosenmuller (highest deep inguinal) | ^ | N1 | RN | RN |
| 400 | Single, multiple, unilateral or bilateral regional nodes: Pelvic lymph nodes, NOS: External iliac Internal iliac (hypogastric) Obturator | N3 | N3 | RN | RN |
| 450 | Stated as N3 with no other information on regional lymph nodes | N3 | N3 | RN | RN |
| 500 | OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 260, 270 and 505 Regional lymph node(s), NOS | ^ | N1 | RN | RN |
| 505 | Regional lymph node(s), NOS: Not stated if single or multiple AND not stated if inguinal or pelvic | ^ | N1 | RN | RN |
| 800 | Lymph nodes, NOS | N1 | N1 | RN | RN |
| 999 | Unknown; not stated Regional lymph node(s) cannot be assessed Not documented in patient record | NX | NX | U | U |