EOD Regional Nodes
Notes
**Note 1:** Code only regional nodes, and nodes, NOS, in this field. Distant nodes are coded in EOD Mets.
**Note 2:** Code 400 for cases with tumor deposits but no identified lymph node metastases. If there are tumor deposits and positive nodes, assign the appropriate code based on the number of positive regional nodes. Do not add the number of tumor deposits to the number of positive regional lymph nodes if one or more lymph nodes contain cancer.
**Note 3:** Code 800 if regional lymph nodes are involved, but there is no indication which ones are involved.
| Code |
Description |
SS2018 N |
| 000 |
No regional lymph node involvement |
NONE |
| 300 |
- Cecal
+ Anterior (prececal)
* Posterior (retrocecal)
* Right colic
- Colic, NOS
- Epicolic (adjacent to bowel wall)
- Ileocolic
- Mesenteric, NOS
- Mesocolic, NOS
- Paracolic/pericolic |
RN |
| 400 |
Tumor deposit(s) in subserosa or mesentery
No regional lymph node metastasis |
RN |
| 800 |
Regional lymph node(s), NOS
Lymph node(s), NOS |
RN |
| 999 |
Unknown; regional lymph node(s) not stated
Regional lymph node(s) cannot be assessed
Not documented in medical record
Death Certificate Only |
U |
(1) Fritz AG, Ries LAG (eds). **SEER Extent of Disease 1988: Codes and Coding Instructions (3rd Edition, 1998)**, National Cancer Institute, NIH Pub. No. 98-2313, Bethesda, MD, 1998
(2) Young JL Jr, Roffers SD, Ries LAG, Fritz AG, Hurlbut AA (eds.). **SEER Summary Staging Manual-2000: Codes and Coding Instructions**, National Cancer Institute, NIH Pub. No. 01-4969, Bethesda, MD, 2001.
(3) Collaborative Stage Work Group of the American Joint Committee on Cancer. **Collaborative Stage Data Collection System User Documentation and Coding Instructions, version 02.05**. American Joint Committee on Cancer (Chicago, IL)
(4) **Appendix**, from the AJCC Cancer Staging System Version 9 (2022). Used with permission of the American College of Surgeons, Chicago, Illinois.
