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**: For rectosigmoid primaries, middle and superior rectal nodes are coded 200, and inferior rectal nodes are coded in CS Mets at DX; for rectum primaries, the inferior, middle, and superior rectal nodes are coded 200. Rectal nodes, NOS are coded 100 for both rectosigmoid and rectum primaries. **Note 3**: For rectum primaries, obturator nodes and internal iliac (hypogastric) nodes, NOS are coded 200; for rectosigmoid primaries, these are coded in CS Mets at DX. **Note 4**: For rectosigmoid primaries, left colic nodes and colic nodes, NOS are coded 200; for rectum primaries, these are coded in CS Mets at DX. **Note 5**: Nodal metastasis is very rare in gastrointestinal stromal tumors and surgeons generally agree that nodal dissection is not indicated. In the absence of information on regional lymph node status, N0 is appropriate; code 999 is mapped to N0 accordingly.
Code Description AJCC 7 N TNM 6 N Summary Stage 1977 N Summary Stage 2000 N
000 No regional lymph node involvement N0 NA NONE NONE
050 Nodule(s) or foci in perirectal fat N1 NA RN RN
100 OBSOLETE DATA RETAINED AND REVIEWED V0203
See code 050 and 110

Regional lymph nodes :
Rectosigmoid:
Paracolic/pericolic
Perirectal
Rectal
Nodule(s) or foci in pericolic fat/adjacent mesentery/mesocolic fat
Rectum:
Perirectal
Rectal, NOS
Nodule(s) or foci in perirectal fat
N1 NA RN RN
110 Regional lymph nodes:
For all sites:
Perirectal
Rectal
For rectosigmoid:
Paracolic/pericolic
N1 NA RN RN
200 Regional lymph node(s):
For all sites:
Hemorrhoidal:
Middle
Superior
Mesenteric, inferior
Rectal:
Middle
Superior
Sigmoidal (sigmoid mesenteric)
For rectosigmoid:
Colic, NOS
Left colic
For rectum:
Hemorrhoidal:
Inferior
Internal iliac (hypogastric), NOS:
Obturator
Rectal, inferior
Sacral, NOS :
Lateral (laterosacral)
Middle (promontorial) (Gerota's node)
Presacral
Sacral promontory
N1 NA RN RN
300 Regional lymph nodes for all sites:
Mesenteric node(s), NOS
Regional lymph node(s), NOS
N1 NA RN RN
400 Stated as N1 with no other information on regional lymph nodes N1 NA RN RN
450 OBSOLETE DATA RETAINED V0200

Stated as N2 pathologic
ERROR: NA RN RN
800 Lymph nodes, NOS N1 NA RN RN
999 Unknown; regional lymph nodes not stated
Regional lymph nodes cannot be assessed
Not documented in patient record
N0 NA U U