CS Lymph Nodes

Notes

**Note 1**: Code only regional nodes and nodes, NOS, in this field. Distant nodes are coded in CS Mets at DX. **Note 2**: Regional nodes include bilateral and contralateral involvement of named nodes. **Note 3**: Determine the size of the largest metastasis in a lymph node as documented in the pathology report to assign codes 100-300, not the size of the lymph node itself. If the size of the metastasis is not documented, determine the size of the largest involved lymph node as documented pathologically or clinically with pathology taking priority. Do not code the size of any node(s) coded in CS Mets at DX. **Note 4**: The assignment of the N category is based both on number and size of metastasis. Use codes as described here if the number and/or size of nodes involved is unknown: * Code 110: Single node involved, size not stated. * Code 210: Multiple nodes involved, size not stated. * Code 200: Single or multiple nodes not stated, size stated and greater than 2 cm but less than or equal to 5 cm. * Code 300: Single or multiple nodes not stated, size stated and greater than 5 cm. * Code 505: Single or multiple nodes not stated, size not stated.
Code Description AJCC 7 N TNM 6 N Summary Stage 1977 N Summary Stage 2000 N
000 No regional lymph node involvement N0 N0 NONE NONE
100 SINGLE regional lymph node, less than or equal to 2 cm:
Iliac, NOS:
Common
External
Internal (hypogastric), NOS:
Obturator
Inguinal, NOS:
Deep inguinal, NOS
Node of Cloquet or Rosenmuller (highest deep inguinal)
Superficial (femoral)
Pelvic, NOS
Sacral, NOS
Presacral
Regional lymph node, NOS

Stated as N1 with no other information on regional lymph nodes
N1 N1 RN RN
110 SINGLE regional node listed in code 100, size not stated N1 N1 RN RN
200 SINGLE regional lymph node listed in code 100, greater than 2 cm but less than or equal to 5 cm
OR
MULTIPLE regional nodes listed in code 100, none greater than 5 cm
N2 N2 RN RN
210 MULTIPLE regional nodes listed in code 100, size not stated N2 N2 RN RN
300 Regional lymph node(s) listed in code 100, at least one greater than 5 cm N2 N2 RN RN
400 Stated as N2 with no other information on regional lymph nodes N2 N2 RN RN
500 OBSOLETE DATA RETAINED AND REVIEWED V0203
See codes 110, 200, 210, 300, and 505

Regional lymph node(s), NOS (size and/or number not stated)
N1 N1 RN RN
505 Regional lymph node(s), NOS:
Size and/or number not stated
(See Note 4 for exceptions)
N1 N1 RN RN
800 Lymph nodes, NOS N1 N1 RN RN
999 Unknown; regional lymph nodes not stated
Regional lymph nodes cannot be assessed
Not documented in patient record
NX NX U U