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**: Inferior mesenteric nodes are coded in CS Mets at DX for cecum, ascending colon, transverse colon, and hepatic flexure . Superior mesenteric nodes are coded in CS Mets at DX for all colon sites. Mesenteric node(s), NOS are coded in CS Lymph Nodes. **Note 3**: Nodal metastasis is very rare in gastrointestinal stromal tumors (GISTs) 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 pericolic fat/adjacent mesentery/mesocolic fat | N1 | NA | RN | RN |
| 100 | OBSOLETE DATA RETAINED AND REVIEWED V0203 Code 100 was defined as "Regional lymph nodes for all colon sites: Colic (NOS), Epicolic (adjacent to bowel wall), Mesocolic (NOS), Paracolic/pericolic, Nodule(s) or foci in pericolic fat/adjacent mesentery/mesocolic fat" in CSv1. Code 100 was defined as "Regional lymph nodes for all colon sites: Colic (NOS), Epicolic (adjacent to bowel wall), Mesocolic (NOS), Paracolic/pericolic" in CSv2:V0201, V0202. All cases should be reviewed and recoded to appropriate codes; see codes 050 and 110. Regional lymph nodes for all colon sites: Colic (NOS) Epicolic (adjacent to bowel wall) Mesocolic (NOS) Paracolic/pericolic |
N1 | NA | RN | RN |
| 110 | Regional lymph nodes for all colon sites: Colic, NOS Epicolic (adjacent to bowel wall) Mesocolic, NOS Paracolic/pericolic |
N1 | NA | RN | RN |
| 200 | OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 210 and 220 Regional lymph nodes, for specific colon sites: Cecum: Cecal, NOS: Anterior (prececal) Posterior (retrocecal) Ileocolic Right colic Ascending colon: Ileocolic Middle colic Right colic Transverse colon and flexures: Inferior mesenteric for splenic flexure only Left colic for splenic flexure only Middle colic Right colic for hepatic flexure only Descending colon: Inferior mesenteric Left colic Sigmoid colon: Inferior mesenteric Sigmoidal (sigmoid mesenteric) Superior hemorrhoidal Superior rectal |
N1 | NA | RN | RN |
| 210 | Transverse colon and flexures: Inferior mesenteric for splenic flexure only Left colic for splenic flexure only Middle colic Right colic for hepatic flexure only Descending colon: Inferior mesenteric Left colic Sigmoid colon: Inferior mesenteric Sigmoidal (sigmoid mesenteric) Superior hemorrhoidal Superior rectal |
N1 | NA | RN | RN |
| 220 | Regional lymph nodes for descending colon: Sigmoid |
N1 | NA | D | RN |
| 300 | Regional lymph nodes for all colon sites: Mesenteric, 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 |